Answer:
Red is the longest of the visible wavelengths.
One would see red first
The visible spectrum can be characterized by "ROY G BIV".
Or
Red-Orange-Yellow-Green-Blue-Indigo-Violet
From the longest wavelength to the shortest (7000-4000 Angstroms)
Equal volumes of hydrogen and helium gas are at the same pressure. The atomic mass of helium is four time that of hydrogen. If the total mass of both gases is the same, the ratio of the temperature of helium (He) to that of hydrogen (H2) is 1/4. 1/2. 1. 2. 4.
By Using Ideal Gas Equation, we calculate the ratio of the temperature of helium (He) to that of hydrogen (H2) is 4.
According to the ideal gas equation, we have :
PV = nRT
It is given that the Pressure and Volume of both gases are equal, So,
It can be concluded that,
nT = Constant
Let [tex]n_{1}[/tex] and [tex]n_{2}[/tex] be the number of moles of Helium and Hydrogen respectively. Then
[tex]n_{1} T_{1} =n_{2} T_{2}[/tex]
Now,
The total mass of both gases is the same,
So, [tex]m_{1} =m_{2}[/tex]
The mass of the element is the product of the number of moles (m) and the molar masses (M).
So, [tex]n_{1} M_{He} =n_{2} M_{H}[/tex]
[tex]M_{He} =4M_{H}[/tex]
This implies, [tex]4n_{1} =n_{2}[/tex]
Now, using this in equation (1), we have :
[tex]n_{1} T_{1} =n_{2} T_{2}\\\\n_{1} T_{1} =4n_{1} T_{2}\\\\\frac{T_{1} }{T_{2} } =\frac{n_{2} }{n_{1} } = 4[/tex]
Thus, the ratio of the temperature of helium (He) to that of hydrogen (H2) is 4.
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ideally, how will the rubber duck (representing individual water particles in a wave) in the image move in comparison to the propagation of a series of waves moving toward the right?
Ideally, the rubber duck (representing individual water particles in a wave) moves ups and down at same position in comparison to the propagation of a series of waves moving toward the right.
What is wave?A wave is an energetic disturbance in a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, an electric or magnetic intensity, an electric potential, or a change in temperature are a few examples.
The distance separating two successively identical wave components is known as the wavelength. The greatest deviation from the neutral position is called the amplitude.
In wave energy and disturbance moves but the materials of the medium remains in same position. So, the rubber duck (representing individual water particles in a wave) moves ups and down at same position in comparison to the propagation of a series of waves moving toward the right.
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FILL IN THE BLANK. Piaget's stage theory of cognitive development suggests that a child's thinking is fundamentally different - more advanced - in each stage than it was in the previous stage. This demonstrates the concept of _____ change.
a. qualitative
b. discontinuous
c. continuous
d. quantitative
This demonstrates the concept of qualitative change.
Qualitative physics is involved with representing and reasoning about the physical world. The goal of qualitative physics is to seize both the common-sense knowledge of the character on the street and the tacit know-how underlying the quantitative knowledge used by engineers and scientists. The place is now a little over ten years antique, which, as a minimum measured in the span of AI, is a protracted time. So it makes experience to step again and attempt to systematize the work in the field and describe the modern kingdom of art.
Qualitative physics is growing rapidly, and thus any survey is likely to become quickly dated. Physics, one of the crowning successes of the scientific technique, has been carried out. on for masses of years. However recollect: Physicists have already got common sense theories of the arena.
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How much does a 100 kg mass weigh on Earth?.
The weight of the object is 981 Newton.
What is weight?Weight is a measurement of how much gravity is pulling on a body.
The weight formula is as follows: w = mg
Since weight is a force, it has the same SI unit as a force, which is the Newton (N). When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity; while the mass may not change from one location to another, the acceleration caused by gravity does.
Given parameter;
Mass of the object, m = 100kg.
we know: Acceleration due to gravity on earth is 9.81 m/s².
Hence, weight of the object is = mg = 100 kg × 9.81 m/s² = 981 kg·m/s² = 981 Newton.
So, its weight is 981 N.
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24 pts! Its all i have left please help
A straight current-carrying wire is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the wire, the current should be passed in the straight wire...
from bottom to top.
from left to right.
from top to bottom.
from right to left.
In order to produce a clockwise magnetic field around the wire, the current should be passed in the straight wire from top to bottom.
option C is the correct answer
What is Fleming's right hand rule?
Fleming's right hand rule states that if we stretch the thumb, forefinger and the middle finger of right hand at right angles to one another in such a way that the forefinger points in the direction of magnetic field.
According to this rule (Fleming's right hand rule), holding a current carrying wire in your right hand, such that the thumb points in the direction of the current, then the direction in which the fingers wrap the wire will represent the direction of the magnetic lines of force.
Thus, a straight current-carrying wire is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the wire, the current should be passed in the straight wire from top to bottom.
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if it can span 300 ft and has a sag of 15 ft , determine the length of the cable. the ends of the cable are supported at the same elevation.
The length of the cable, 3000 ft
How to determine the length of the cable?Distance is measured in length. Length has the dimension of distance in the International System of Quantities. The majority of measurement systems choose a base unit for length from which all other units are derived. The metre serves as the foundational unit of length in the International System of Units.we know,
[tex]y=\frac{4h}{l^{2} } x(l-x)[/tex]
where,
h, maximum height= 15 ft
l= span = 300 ft
Therefore,
[tex]y=\frac{4h}{l^{2} } x(l-x)[/tex]
[tex]y=\frac{4*15}{300^{2} } x(300-x)[/tex]
[tex]\int\limits {y} =\int\limits^3_0 {\frac{4*15}{300^{2} } x(300-x)} \, dx[/tex]
Therefore, The length of the cable, 3000 ft.
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a) no net force acts on the car during interval b. b) net forces act on the car during intervals a and c. c) opposing forces may be acting on the car during interval b. d) opposing forces may be acting on the car during interval c. e) the magnitude of the net force acting during interval a is less than that during c.
The magnitude of the net force acting during interval C is greater than that during A.
In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull. A force has both value and path, making it a vector quantity.
Pressure is a push or a pull and it affects our daily lives because, without force, people might not be capable of opening and near stuff or lifting up their arms or legs.
Variety of Forces :
* Muscular Forces, muscular tissues feature to produce an ensuing force which is referred to as 'muscular force'.
* Frictional Forces, while an item modifications its national motion, 'frictional pressure' acts upon it.
* Carried out pressure.
* Tension force.
* Spring force.
* Gravitational pressure.
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A sports car is accelerating up a hill that rises 21.7 ° above the horizontal. The coefficient of static friction between the wheels and the road is μs = 0.880. It is the static frictional force that propels the car forward. (a) What is the magnitude of the maximum acceleration that the car can have? (b) What is the magnitude of the maximum acceleration if the car is being driven down the hill? I set up my fbd with the static frictional force acting in the -x direction, the normal force acting perpedicular to the inclined plane, and the weight acting in the -y direction. Without knowing the weight of the car or if it is at a constant velocity, I'm not sure how to go about setting up this problem.
The maximum acceleration that the car can have is 11.17 m/s² and the maximum acceleration the car can have while driving downhill 5.4 m/s².
(a) Mass of the car = m
Acceleration due to gravity = g
Angle of inclination = θ = 21.7°
Acceleration of the car = a
Coefficient of static friction = μ = 0.880
Force pushing the hill is the maximum static force = μ×m×g×cosθ
Force down the hill = m×g×sinθ
Total force = m × a
Thus, equating all the force,
= m × a = (μ×m×g×cosθ) - (m×g×sinθ)
= a = [(μ×m×g×cosθ) - (m×g×sinθ) ] / m
= a = (μ×g×cosθ) - (g×sinθ)
= a = g × [(μ×cosθ) - (sinθ)]
= a = 9.8 × [ (0.88 × cos 21.7) - (sin 21.7)]
= a = 9.8 × [ (0.88 × - 0.96) - 0.29 ]
= a = 11.17 m/s²
(b) While going down the hill, gravity and friction act in the same direction:
Thus, equating all the force,
= m × a = (μ×m×g×cosθ) + (m×g×sinθ)
= a = [(μ×m×g×cosθ) + (m×g×sinθ) ] / m
= a = (μ×g×cosθ) + (g×sinθ)
= a = g × [(μ×cosθ) + (sinθ)]
= a = - 5.4 m/s²
The sign is negative as the car is going downhill.
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when children withdraw from contact with others, they tend to get rejected by others in turn. as these children become adolescents, the avoidance by others .
As these kids grow into teenagers, other people's avoidance of them is likely to get worse. Some kids cut off contact with others, which causes other people to reject them.
How old is adolescence?Overview. Ages 10 to 19 are considered adolescent years, the transitional period between childhood and maturity. It is a distinct period in human development or a critical time for establishing the basis of health. Teenagers go through a rapid period of physical, cognitive, and psychosocial development.
Who falls into this category?Beginning with the commencement of physically normal puberty, adolescence lasts until the acceptance of an adult identity and behavior. According to the Global Health Firm's definition of adolescence, this developmental stage falls roughly between the ages between 10 and 19 years.
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The dots in these cylinders represent the shape and density of the particles in the different states of matter. each dot represents a charged ion, so when two ions are together in pair, they represent a neutral atom. an illustration of 4 beakers labeled a, b, c and d with particles in them. beaker a has singular particles with a lot of space between them. beaker b has particles joined in pairs with a lot of space between them. beaker c has individual particles closer together and in the bottom half of the beaker. beaker d has individual particles against each other in the bottom half of the beaker in a fixed pattern. which container most likely contains a plasma? a b c d
The container which is most likely to have plasma is option A) i.e, blue dots.
There are four physical states of matter, they are solids, liquids, gases and plasma.
The first container is likely to contain a gas. In this state, the neutral atoms or molecules are moving freely, so that the particles occupy the whole container.
The representation corresponding to paired green and orange dots in container 2 represents that they are not free ions as they are paired and they occupy the entire space inside the container.
The molecules or ions are tightly packed in solids. this is represented by the red dots in container D. These substances do not change or adapt to the container.
Plasma is a state that is similar to the that of a gas. But these particles are also free ions. It is represented by the blue dots in container A.
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It is beaker D. with all the red circles at the bottom
what is happening to the velocities of disk stars as distances increase beyond the highlighted point? the stars' velocities are...
To learn about the velocity and disk stars to find the velocities increasing point.
What is velocity?
Velocity is the rate of change in direction of an object in motion as measured by a specific standard of time and observed from a specific point of reference (for example, 60 km/h northbound).
What is disk stars?
The stars on disks are Population I stars. This indicates that they are relatively young stars with circular orbits in the plane of the galaxy. They typically have a lot of metal. Due to the abundance of gas and dust on the disk, vigorous star formation occurs there.
By observing the graph the curve is gradually increasing with increase in distance.
Thus the velocity is increasing with the distance after the highlighted graph.
Therefore, the velocity is increasing with the distance after the highlighted graph.
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how far from the lens must the film in a camera be, if the lens has a 35.0 mm focal length and is being used to photograph a flower 75.0 cm away?
The focal length of the lens is known to be 35 mm, and it is implied that the formed image must be on the opposite side of the object; as a result, the image is real and the distance d is positive.
However, the lens's focal length's sign, or whether it is converging or diverging, is unknown.However, since it is known that the image is real and that the distance d is greater than the focal length f, the convex lens—which has the ability to produce both real and virtual images—is used in this situation. However, it will only produce a real image if the object is farther away from the focal point . We have f=35.0 mm=3.50 cm because d_o > fd > f indicates that the used lens is convex and would have a positive sign.To know more about focal length of the lens -
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to determine the norm of residual for vector d by using the following function, select the correct sentence to fill in the missing part in function calresidual.
The answer to this question will be while i < D (length).
The norm of residuals is a degree of the goodness of healthy, in which a smaller price shows a better match than a bigger price. it's far calculated the usage of the norm function, norm(V,2), where V is the vector of residuals.
The residual for every observation is the distinction between predicted values of y (dependent variable) and discovered values of y. Residual=actual y value−expected y fee,ri=yi−^yi. In linear regression, a residual is a difference between the actual price and the price anticipated with the aid of the version (y-ŷ) for any given point.
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what can be said about the speed of the object when the velocity and acceleration have opposite signs?
Answer: if the acceleration has the opposite sign as the velocity, the object will be slowing down.
Explanation:
object 1 and object 2 have the same mass and are moving at the same speed. true or false? the momentum of object 1 must be the same as the momentum of object 2
object 1 and object 2 have the same mass and are moving at the same speed. TRUE
Why is the given statement true ? What is momentum ?The given statement is true because the momentum of an object is defined as mass multiplied by velocity. And both of these objects have the same mass which means the first condition is satisfied and secondly they have the same velocity too. Thus the second condition is also satisfied.
Thus we can say that the momentum of both the objects will be the same.
As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum. p = mv.
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how long will it take a 5oW heater to melt 2KG of ice at 0 degrees Celcius.
Specific latent heat of fuison of ice = 335000J/KG
The time it takes the heater of 50 W to melt the is 13400 seconds.
What is time?Time is the measured or measurable period during which an action, process, or condition exists or continues :
To calculate the time it will take the heater to melt the ice, we use the formula below.
Formula:
t = mC/P.......... Equation 1Where:
t = Time m = Mass of the iceC = Specific latent heat of fusion of the iceP = Power of the heaterFrom the question,
Given:
m = 2 kgC = 335000 J/kgP = 50 WSubstitute these values into equation 1
t = (2×335000)/50t = 13400 seconds.Hence, the time it takes the ice to melt is 13400 seconds.
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use this information to determine the air temperature at points b through g on the diagram. each point represents a change in height of 1000 meters. point b, for example, is 1000 m higher than point a. the information at the base of the mountain graphic is useful for answering the question, especially the dry and wet adiabatic rates.
The dry and wet adiabatic rates Leeward.
Clouds form when warm air masses which are less dense than cold air masses, rise. The jet stream plays an important role in locating mid-latitude cyclones. The jet stream brings cold air to the northern and southern regions of the United States. A front separates these two air masses.
A front is a boundary separating air masses of different densities, one warmer and often wetter than the other. A warm front occurs when the surface of the front shifts so that warm air occupies an area previously covered by cold air. Endothermic processes absorb heat and cool the surroundings.
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12. why does the sun gradually brighten and how does this brightening affect the location of the habitable zone over time?
Therefore, Europa lies outside the habitable zone of the sun and is therefore not a place where life can exist.
What is habitable zone?
The habitable zone gradually takes on a new shape. How much starlight can warm a planet determines its shape. The physical size and luminosity of an aging star increase in all directions, and as they do, so does their heat, which moves outward with them.
What is sun stage?
The Sun is currently and will remain for the next 4-5 billion years a main-sequence star. It will then develop and cool to become a red giant before shrinking and reawakening to become a white dwarf. The white dwarf star will gradually cool down once its nuclear fuel has run out over many billions of years.
When hydrogen in the core transforms into helium, the density of hydrogen begins to decline over time. This causes the rate of nuclear reactions to slow down in the core, which lowers radiation pressure.
By warming and contracting to maintain the balance while gravity pulls inward, the core compensates. The sun's temperature starts to rise as a result. The brightness of the sun also rises when the temperature starts to rise.
As the habitable zone expands and moves away from the sun, it is affected by the sun's brightness over time.
Earth has been habitable for 4 billion years because its surface temperatures allow liquid water to exist.
Titan is colder than Earth and lacks liquid water that is stable. Titan is not a place where people can live.
The habitable zone of the sun extends only as far as Mars. The surface of Mars is inhospitable.
Europa is heated by the tides, which permits liquid water to exist beneath its ice-covered surface.
Therefore, Europa lies outside the habitable zone of the sun and is therefore not a place where life can exist.
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Part B Which, if any, of these scenarios produce an inverted image? Which, if any, of these scenarios produce an upright image? Sort the following scenarios into the appropriate bins. Reset Help d=5 cm f = 20 cm d d=10 cm f5 cm d d 15 cm J = 5 cm d 10 cm f = 20 cm 15 cm - 20 cm 20 cm 10 cm inverted image upright image Submit Request Answer Part Rank the images on the basis of the magnitude of their magnification Rank these from largest to smallest. To rank items as equivalent, overlap them. View Available Hint(s) Reset Help d 15 cm 10 cm 20 cm d=20 cmd =10 cm f = 10 cm If=5 cm d = 15 cm f=5 cm d = 5 cm f =20 cm 1 20 cm largest smallest Submit
based on how much they have been magnified, the images Sort them in order of greatest to smallest. Overlap things to determine their equality.
m₆>m₁>m₅>m₃=m₂>m₄
Part B:-
By using the lens equation
[tex]\frac{1}{f} = \frac{1}{d} +\frac{1}{i}[/tex]
[tex]i=\frac{fd}{d-f}[/tex](1)
now the equation for magnification is
[tex]m=\frac{-i}{d}[/tex](2)
(i) d=5cm , f=20cm
put values in the (i) equation
[tex]i=\frac{20*5}{5-20}[/tex][tex]=-6.7cm[/tex]
for (2) equation
[tex]m=\frac{-(-6.7)}{5}[/tex]
=1.34 →image upright
(ii) d=10cm f=5cm
[tex]i=\frac{10*5}{10-5}[/tex] [tex]= 10cm[/tex]
m=-10/10=-1→image is inverted
(iii) d=15cm f=5cm
[tex]i=\frac{15*5}{15-5}[/tex] [tex]= 7.5cm[/tex]
[tex]m=\frac{-7.5}{15}[/tex] [tex]= -0.5[/tex]→images is inverted
(iv) d=10cm f=20cm
[tex]i= \frac{10*20}{10-20}[/tex] [tex]=-20cm[/tex]
[tex]m=\frac{-(-20)}{10}[/tex] =2→image is upright
(v) d=15cm f=20cm
[tex]i= \frac{15*20}{15-20}[/tex] = -60cm
[tex]m=\frac{-(-60)}{15}[/tex] = 4→image is upright
(vi) d=20cm f=10cm
[tex]i=\frac{20*10}{20-10}[/tex] [tex]= 20cm[/tex]
[tex]m=\frac{-20}{20}[/tex] = -1 →image is inverted
part c
[tex]\frac{1}{f} =\frac{1}{d} + \frac{1}{i}[/tex]
[tex]i=\frac{df}{d-f}[/tex]
The magnitude of magnification is
m=|-i/d|=|-f/(d-f)|
(i)m₁=|-20/(10-20)|=2
(ii)m₂=|-10/(20-10)|=1
(iii)m₃=|-5/(10-5)|=1
(iv)m₄=|-5/10|=0.5
(v)m₅=|-20/5-20|=1.33
(vi)m₆=|-20/-5|=4
∴m₆>m₁>m₅>m₃=m₂>m₄
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assess what fundamental organizational culture properties affect project successes and failures or become a hindrance to project teams.
Assess organizational review could affect project successes and failures or become a hindrance to project teams.
About project managementProject Management is one of the methods offered for the purpose of managing a project, namely a management method developed scientifically and intensively since the mid-20th century to deal with specific activities in the form of projects.
Project Management is an attempt at an activity so that the purpose of the activity can be achieved efficiently and effectively. Effective in this case is where the results of the use of resources and activities are in accordance with the target which includes quality, cost, time and others.
While efficient means the use of resources and the selection of sub-activities appropriately which includes the amount, type, time of use of other resources and others. Therefore project management in a construction project is something that cannot be simply ignored, because without project management, construction will be difficult to run as expected in terms of cost, time and quality.
Project Management covers the planning process ( planning ) activities, arrangements (organizing), implementation and control (controlling). The process of planning, organizing, implementing and controlling is known as the management process
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A child is on a playground they start to slide down a large slide. At what point is the child in dynamic equilibrium with the slide?(1 point) responses when the child pushes themselves down the slides. When the child pushes themselves down the slides. As the child is in motion as they are sliding down. As the child is in motion as they are sliding down. When the slide ends and the child has stopped moving. When the slide ends and the child has stopped moving. The child will not reach dynamic equilibrium.
When two surfaces glide past one another, a force known as friction is created.Friction forces that oppose the motion of moving objects cause them to expend energy and slow down.
What is the role of sliding friction in the movement?An object rolls on a surface, creating rolling friction. When two surfaces rub against one another, sliding friction occurs. The deformation of surfaces causes rolling friction. Because tiny surfaces connect, sliding friction occurs.
Therefore, When the child pushes themselves down the slides. As the child is in motion as they are sliding down.
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Answer:When the child pushes themselves down the slides.
Explanation: i think im not sure
What is the frequency of a wave with a wavelength of 200?.
The wave's frequency, f=0.5Hz or 1/s, should be regarded as the waves with a wavelength = 200 cm.
What then is the wavelength?Wavelength is the separation between corresponding points (adjacent crests) in successive cycles of a waveform signal traveling through space or over a wire. In wireless systems, the length is typically expressed in meters (m), centimeters (cm), or millimeters (mm).
Since the wavelength is 200 cm or 2m
Also we know that
frequency is reciprocal of wavelength
So,
f=1/2
f=0.5Hz
What role does wavelength play?The wavelength is a crucial characteristic since it governs the nature of the light. Green light spectrum that is distinct from both of them, while red light has a wavelength that is distinct from both blue and green light.
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the ampacity of supply branch-circuit conductors and the current rating of overcurrent protective devices for diagnostic x-ray equipment shall not be less than percent of the momentary rating or percent of the long-time rating, whichever is greater.
The ampacity of supply feeders and the current rating of overcurrent protective devices supplying two or more branch circuits supplying X-ray units shall not bet less than 50 percent of the momentary demand rating of the largest unit plus 25 percent of the momentary demand rating of the next largest unit plus 10 percent of the momentary demand rating of each additional unit.
The ampacity of supply branch-circuit conductors and the current rating of overcurrent protective devices shall not be less than 50 percent of the momentary-rating or 100 percent of the long-time rating, whichever is greater.Where simultaneous biplane examinations are undertaken with the X-ray units, the supply conductors and overcurrent protective devices shall be 100 percent of the momentary demand rating of each X-ray unit.The ampacity of conductors and rating of overcurrent protective devices shall not be less than 100 percent of the current rating of medical X-ray therapy equipment.To know more about overcurrent protection visit:
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what is the diffraction angle in degrees for a setup using a 6,393 angstrom slit with a minima of order 28 and a wavelength of 22 nm?
Diffraction depends on the ratio of wavelength to linear dimension of obstacles in the optical path.
What is a diffraction angle?
Diffraction depends on the ratio of wavelength to linear dimension of obstacles in the optical path. The smaller the value of this ratio, the less diffraction. As an example, consider Fraunhofer diffraction from a single slit. where the width of the slot is the linear dimension of the obstacle. We call the slit an obstacle because only a limited portion of the wavefront in the plane of incidence can pass through it. In fact, we define diffraction as the effect caused by a finite portion of the wavefront.
For a single slit, finding the angular distance between the main maxima and the first minima gives a rough idea of how much diffraction is occurring.
What is wavelength?
Wavelength is the distance between identical points (adjacent peaks) in adjacent cycles of a waveform signal propagating in space or along a line. For wireless systems, this length is usually specified in meters (m), centimeters (cm), or millimeters (mm). For infrared (IR), visible light, ultraviolet (UV), and gamma rays (γ), wavelengths are more commonly specified in nanometers (nm), with units of 10-9 m or Angstroms (Å). , which is in units of 10-10 m.
Therefore, Diffraction depends on the ratio of wavelength to linear dimension of obstacles in the optical path.
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You stand in front of a mirror. How tall does the mirror have to be so that you can see yourself entirely?a. same as your heightb. less than your full height but more than half your heightc. half your heightd. less than half your heighte. any size will do
In other words, you need as much mirror as your height to see a reflection of yourself in a flat mirror. A correctly positioned 3 foot-long mirror is required for a 6 foot-tall guy to see his whole reflection.
What is mirror?
A thing that reflects images is a mirror as well as looking glass. When focused through an eye or camera lens, light that reflects off a mirror will reveal an image of what is in front of it. Mirrors reflect light from an equal but opposite angle, reversing the direction of the image. This enables the viewer to see themselves, objects behind them, and even objects that are in their line of sight but out of it, like objects that are around a corner, but are at an angle from them. Natural mirrors have been around since the beginning of time, such as the water's surface, but for thousands of years, people have been making mirrors from a variety of materials, including stone, metals, and glass.
Ray diagrams were explained and demonstrated for use. The location along a mirror that a person must look in order to see an image of themselves can be determined using ray diagrams. So it is possible to utilize ray diagrams to calculate what area of a plane mirror must be used in order to display an image.
The mirror must be at least half your height in size in order to show your entire image. It really is that easy mirror.
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a cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 7.90 cm. if the cork is 13.5 m from shore, how long does it take a ripple passing the cork to reach the shore?
The time taken for the cork to reach the shore is 85.44 s.
What is the wave's fundamental formula?Write down the wave function as y(x,t)=Asin(kxt+) to determine a sinusoidal wave's amplitude, wavelength, period, and frequency. The equation itself can be used to read the amplitude, which equals A. The angular frequency (T=2) can be used to calculate the wave's period.
Calculation:Frequency of oscillation, f = 2hz
Wavelength of oscillation, λ = 7.90 cm
Distance of the cork from the shore, d = 13.5 cm
The speed of wave is:v = f × λ
v = 2 × 0.079
v = 0.158 m/s
Time taken by the cork to reached the shore is:time = distance / speed
time = 13.50 / 0.158
time = 85.44 s
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Two objects are at rest on a frictionless surface. Object 1 has a greater mass than object 2.
(a) When a constant force is applied to object 1, it accelerates through a distance d. The force is removed from object 1 and is applied to object 2. At the moment when object 2 has accelerated through the same distanced, which statements are true? (Select all that apply.)
1. K1 < K2
2. p1 > p2
3. p1 = p2
4. p1 < p2
5. k1 = K2
6. k1 > k2
(b) When a force is applied to object 1, it accelerates for a time interval Δt. The force is removed from object 1 and is applied to object 2. Which statements are true after object 2 has accelerated for the same time interval Δt? (Select all that apply.)
1. K1 > K2
2. p1 < p2
3. k1 < K2
4. k1 = k2
5. p1 > p2
6. p1 = p2
Linear Momentum & Kinetic Energy
To compare the momentum and kinetic energy of two objects, we need to know the mass of the object and the speed acquired by the moving object. To solve this problem, we need to take advantage of the work-energy theorem and the impulse-momentum theorem.
According to the work-energy theorem:
W
net
=
Δ
K
According to the impulse-momentum theorem, we write:
I
m
p
u
l
s
e
=
C
h
a
n
g
e
i
n
m
o
m
e
n
t
u
m
The momentum of the object is calculated by using the following formula:
|
→
p
|
=
m
v
The kinetic energy of the object is calculated by using the following formula:
K
=
1
2
m
v
2
where m
is the mass of the object, v
is the speed of the object, and K
is the kinetic energy of the object.
The correct relation will be:
(a) K1 = K2
(b) K1 < K2
According to the question,
Potential energy be "P".
Kinetic energy be "K".
(a) Work done towards both the block will be similar.
So,
P₁ = P₂
K₁ = K₂
(b) We know,
α = F/M
or V = a x t
Now,
Kinetic energy = (1/2)mv²
K = 0.5 * M * V²
K = 0.5 * M * F²/M² * t²
K = 0.5 * F² * (t²/M)
Therefore, the kinetic energy of 1 is smaller than kinetic energy of 2 as the force and time will be same. So K of the smaller mass will be greater than the larger mass.
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a volleyball player jumps up to spike the ball over the net. to spike the ball without changing the spin on the ball the athlete will applies a torque to the ball
The term "biomechanics of volleyball" describes the application of this science to the movements used in the sport.
What is biomechanics?The study of how the body functions mechanically is known as biomechanics. By examining the individual components, this field aims to make sense of the intricate nature of human movement. The term "biomechanics of volleyball" describes the application of this science to the movements used in the sport.In volleyball, quickness, power, strength, and finesse are used in complicated combinations. Each of these parts is made up of intricate, little movements, the sums of which are coordinated attempts to strike the volleyball in the desired way. One of the most thrilling shots in volleyball when done well is the spike, which is a fantastic illustration of this.To learn more about Biomechanics refer to:
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Predict the brightness of the light you would see on a screen places at points 1, 2, and 3.
Describe how you might use a picture like the one on the left to support your prediction and explain what is happening at points 1, 2, and 3 on the right. We are interested in your ideas. Write down all the ideas you can think of. You can use the simulation to help you.
The phenomenon taking place here is the interference of light.
We can see the interference-induced formation of two distinct regions in the given figure.
A region has alternating black and white patches. It represents constructive interference.
The other zone is just monotone gray as shown in the figure below. It represents destructive interference.
Now, we need to predict the brightness of the light at points 1, 2, and 3 on the screen.
We can see that point 2 is located in a region of destructive interference. So, we will see an area with zero brightness i.e. a black area on the screen.
Points 1 and 3 are located in the zone of constructive interference. So, we will see an area with high brightness on the screen.
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What happens to an object in each second of free fall?.
An object in each second of free fall than falls a greater distance than it did in the previous second.
In mechanics, "freefall" refers to the condition of a body when it is subject to gravity and can move freely in any direction. In the Sun's gravitational field, the planets, for instance, are falling freely. Because both the ship and the astronaut are falling, weightlessness is felt by an astronaut orbiting the Earth in a spacecraft. Even though they are both subject to Earth's gravitational pull, the spacecraft stays in orbit around the planet thanks to its forward momentum. Only the center of mass is falling freely because gravitational forces are never uniform. Tidal forces are present at all other places of a body because they move in a slightly different gravitational field.
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