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Explain how surface waves can have characteristics of both longitudinal waves and transverse waves.
Answers
Explanation:
Usually when we think of waves, we think of transverse waves. These are waves where points move up and down perpendicular to the motion of the wave. Examples include water waves, whipping a rope, or even doing the "wave" in a crowd. You can think of these as "two dimensional" waves.
Longitudinal waves are waves where points move left or right, parallel to the motion of the wave. In other words, there is compression and expansion of the medium. Examples include sound waves, or pulses in a slinky.
Related Questions
A person is trying to drag a box with a mass of 30 kg on a flat floor using a rope attached to it. The static frictional coefficient between the box and floor is 0.50. The angle between the horizontal direction and the rope is 30 degrees. What is the minimum force the person needs to have to move the box along the floor?
Answers
Answer: F = 131.7N
Explanation:
You are given the following parameters.
Mass M = 30 kg
Coefficient of static friction μ = 0.5
Ø = 30 degrees
When the person is trying to drag the box with force F, the static frictional force Fs will be acting in the opposite direction.
From the figure attached, resolve all forces into horizontal component and vertical component.
Horizontal component:
Fs - F cosØ = 0
Fs = F cosØ
F cosØ = μN ...... (1)
Vertical component:
N + F SinØ - mg = 0
N = Mg - F SinØ ..... (2)
Substitutes m, g and Ø into the equation 2
N = (30 × 9.8) - F × sin30
N = 294 - 0.5F
Substitute N and coefficient of friction into the equation (1)
F cos30 = 0.5 (294 - 0.5F)
Open the bracket
0.8660F = 147 - 0.25F
Collect the like terms
1.116025F = 147
F = 147/1.116025
F = 131.7 N
Therefore, the minimum force the person needs to have to move the box along the floor is 131.7 N
The kinetic energy of an object can be found if the object's _
and _ are known.
Answers
Answer:
The kinetic energy of an object can be found if the object's mass and velocity are know because kinetic energy is energy possessed by a body due to its motion
Explanation:
In an elastic head-on collision, a 0.60 kg cart moving at 5.0 m/s [W] collides with a 0.80 kg cart moving at 2.0 m/s [E]. The collision is cushioned by a spring (k = 1200 N/m).
a) Determine the velocity of each cart after the collision.
b) Determine the maximum compression of the spring.
Answers
Answer:
The answer is given below
Explanation:
u is the initial velocity, v is the final velocity. Given that:
[tex]m_1=0.6kg,u_1=-5m/s(moving \ west),m_2=0.8kg,u_2=2m/s,k=1200N/m[/tex]
a)
The final velocity of cart 1 after collision is given as:
[tex]v_1=(\frac{m_1-m_2}{m_1+m_2})u_1+\frac{2m_2}{m_1+m_2}u_2\\ Substituting:\\v_1=\frac{0.6-0.8}{0.6+0.8} (-5)+\frac{2*0.8}{0.6+0.8}(2)= 5/7+16/7=3\ m/s[/tex]
The final velocity of cart 2 after collision is given as:
[tex]v_2=(\frac{m_2-m_1}{m_1+m_2})u_2+\frac{2m_1}{m_1+m_2}u_1\\ Substituting:\\v_1=\frac{0.8-0.6}{0.6+0.8} (2)+\frac{2*0.6}{0.6+0.8}(-5)= 2/7-30/7=-4\ m/s[/tex]
b) Using the law of conservation of energy:
[tex]\frac{1}{2}m_1u_1+ \frac{1}{2}m_2u_2=\frac{1}{2}m_1v_1+\frac{1}{2}m_2v_2+\frac{1}{2}kx^2\\x=\sqrt{\frac{m_1u_1+m_2u_2-m_1v_1-m_2v_2}{k}}\\ Substituting\ gives:\\x=\sqrt{\frac{0.6*(-5)^2+0.8*2^2-(0.6*3^2)-(0.8*(-4)^2)}{1200}}=\sqrt{0}=0\ cm[/tex]
virtual images can be projected to a screen if you turn the screen slightly true or false
Answers
False
Virtual image cannot be caught on a screen
Calculate the volume of the part of the sphere that will be immersed in the mercury when the density of the sphere is 7800kg/metre cubic and volume of 136centrimetre cubic and the density of the mercury is 13600kg/metre cubic
Answers
Answer:
78 cm³
Explanation:
The Volume Immersed = (density of object/ density of fluid) x Volume of Object
Vi = (7800/13600) x 136 = 78 cm³
A thin spherical shell of metal has a radius of 0.25 meter and carries a charge 0.2 mC. Calculate the electric intensity at a point (i) inside the shell, (ii) just outside the shell (iii) 3 m from the center of the shell. (Ans: zero ; 2.88 x 104 N/C ; 200 N/C) 4. Two large, thin metal
Answers
Answern:no it’s all wrong it’s 3.00 and the third is .22 and the thirds is .15
Explanation:
A new landowner has a triangular piece of flat land she wishes to fence. Starting at the west corner, she measures the first side to be 80.0m long and the next to be 105m. These sides are represented as displacement vectors A and B in the above. She then correctly calculates the length and orientation of the third side, C. What is her result?
Answers
Answer:
C = 93.4m
Ф₃= 54°
Explanation:
if Ф₁ =21° and Ф₃ = 11°
The new landowner has a triangular piece of flat land, and she wishes to fence. The length and orientation of the third side are 92.3 meters, with an orientation of 53.7°.
What is the Vector law of Algebra?Numerous algebraic operations involving vectors are carried out using vector algebra. The Latin word for the carrier is a vector. Points A and B are transported by vectors. The magnitude of the vector is the length of the line connecting the two points A and B, and the vector's direction is the movement from point A to point B. Other names for vectors are Euclidean vectors and spatial vectors. In many different domains, including mathematics, physics, engineering, and others, vectors are used.
Now, according to the question :
Let the given vector is R, and it makes an angle of θ then its components will be :
[tex]R_x[/tex] = R cos θ
[tex]R_y[/tex] = R sin θ
As we know that A + B + C =0
A is given as 80 m with direction 21° below the x-axis and,
B is 105 meters, with a direction of 11° counterclockwise from the positive y-axis.
[tex]A_x\\[/tex] = 80 cos 21°
[tex]A_y[/tex] = -80 sin 21°
similarly,
[tex]B_x\\[/tex] = 105 cos 101°
[tex]B_y[/tex] = -105 sin 101°
C = -(A+B)
C = -( 80 cos 21° + 105 cos 101°) i - (-80 sin 21°+105 sin 101°) j
C = 54.65 i -74.40 j
So the magnitude vector of C will be :
|C| = [tex]\sqrt{Cx^2+Cy^2}[/tex]
|C| = 92.3 m
Now direction will be :
θ = arc tan (Cy/Cx)
θ = 53.7°
Hence, the orientation of the third side will be 53.7° and the length will be 92.3 meters.
To get more information about Vector law of algebra :
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Why do planents revolve around the sun ?
Answers
Answer:
Sun's Gravitational Pull
Explanation:
Planets revolve around the sun because of the Sun's gravitational pull pulling all the planets to revolve around it.
Q1. Tractors are often used on sloping fields, so stability is important in their design. On the diagram, the center of the X marks the center of the tractor.
a) Explain why the tractor has not toppled over.
b) Give two features of the tractor which affects its stability.
Q2. The diagram shows two buses. Bus A is empty. Bus B contains bags of sand upstairs to represent passengers. Each bus has been tilted as far as it can without falling over.
a) Each bus will topple over if it is tilted any further. Explain why this will happen.
b) What difference does it make to the stability of the bus when the upper deck is full of passengers?
c) Why are the bags of sand in bus B only put upstairs?
Q3. A tractor is being used on a rough ground. What is the safest position for its center of mass? it is an emergency I will give you 20 points
Answers
Answer:
a) The tractor has not toppled over because the the center of mass is acting in between the wheels
b) The features which affect its stability are;
1) The location of the center of gravity of the tractor close to the ground
2) The increased spacing between the left and the right wheels of the tractor
Q2. a) The center of mass wheel act in the region to the right away the wheel span (space in between the wheel) which creates a clockwise effect to, topple the buses over
b) It raises the bus's center of mass higher
c) To raise the center of mass to its highest practical level
Q3. At the bottom middle location within the tractor
Explanation:
a) The tractor has not toppled over because the vertical line from the center of gravity to the ground is still in between the wheel base such that since the tractor will topple over by turning clockwise about the right tire due to its weight, the weight of the tractor is currently acting in the anticlockwise direction to the right end tire of the tractor keeping the tractor's tires in good contact with the ground
b) The features which affect its stability are;
1) The location of the center of gravity of the tractor close to the ground
2) The increased spacing between the left and the right wheels of the tractor
Q2. a) When either of the buses are tilted further, the mass of the buses is acting on the tires and in their tilted condition, the mass is acting mainly on the right tire, whereby as the vertical line from the center of mass to the ground is in between the wheel bases the mass of the buses still serve s the restoring force to keep the bus on ground by providing anticlockwise moment where clockwise lotion is required for the bus to topple over
If the buses are tilted further, the vertical line from the center of mass will cross to the other side of the right tire such that the mass now provides clockwise moment turning the buses clockwise and since there are no opposing anticlockwise moment to balance that of the now clockwise moment of the buses it will continue to turn clockwise with the result that they eventually topple over
b) When the upper deck is full of passengers, there will be an appreciable proportion of the total mass of the bus in the upper deck such that the level of the center of mass will be raised up higher
c) Sand bags are only put upstairs because by allowing for the disproportionate distribution of load such that the majority of the load of the bus is concentrated upstairs, the center of mass will be at its maximum height allowing the bus to be tested for stability in the worst case scenario
Therefore, the sands are only put upstairs to raise the center of mass
Q3. Being that the tractor is being used on a rough ground, the safest position will be at the lowest possible location at the middle of both the front and rear wheels and the left and right tires.
sara walks part way around a swimming pool. she walks 50 yards north, then 20 yards east, then 50 yards south. the magnitude of her displacement during this walk is ______ yards
Answers
Answer:
+20 yards
Explanation:
Given:
North = 50 yards
East = 20 yards
South = 50 yards
Required
Calculate the magnitude of displacement
Displacement is a vector quantity and it is a measure of distance taken and the direction of the distance.
Take up directions as positive and down directions as negative.
Similarly, we'll take right direction as positive and left direction as negative.
We understand that;
North is upwards; so, the displacement is +50 yards
East is rightwards; so, the displacement is +20 yards
South is downwards; so the displacement is -50 yards
Hence, her total displacement is
Displacement = +50 yards + 20 yards - 50 yards
Displacement = +20 yards
Hence, Sara's displacement is +20 yards
who performed the coin and feather experiment?
Answers
Answer: Robert Boyle
Explanation:
Galileo's experiment and coin and feather experiment performed by Robert Boyle.
Answer:
Robert Boyle
Explanation:
Robert Boyle performed the experiment of Galileo
Please give me brainliest please
if a room is closed for 2-4 hours then when we open the door we need a little bit of more energy than the actual energy and feel someone is pushing the door from the back side . what is the reason behind it ? which force is that?
Answers
Answer:
The reason is because the pressure of the air inside the room drops with time which makes opening the door to require an increased amount of force to make up for the reduced pressure inside the room
Explanation:
From the kinetic theory of gases we have the following relation;
[tex]v_{rms} = \sqrt{\dfrac{3 \cdot K \cdot T}{m} }[/tex]
[tex]p = \dfrac{n \cdot MW \cdot v^2_{rms} }{3 \cdot V}[/tex]
Where:
K = Boltzmann constant
T = Temperature
m = Mass
MW = Molecular weight
V = Volume
[tex]v_{rms}[/tex] = Root mean square velocity
Whereby the room door is closed, the kinetic energy of the air particles will be used up such that the average velocity of the particles will decrease, given that the volume of the room is constant, the pressure inside the room will drop below the original pressure outside the room such that the force on the door due to the outside pressure is larger than the force on the door from inside the room requiring a larger amount of force to overcome the resistance of the now higher outside pressure force.
3.-¿ Como actuarias tú, si en pleno juego el árbitro toma una decisión, apesar de estar equivocado?¿finalizado el encuentro te despedirias del arbitro? Si - No ¿Porqué?
Answers
Answer:
Comprobar explicación
Explanation:
Si el árbitro toma una decisión en el medio del juego, a pesar de estar equivocado, normalmente, como humano, las emociones están destinadas a superarlo, pero de acuerdo con el reglamento, hay conductas aceptables y una protesta llena de emociones. en el árbitro puede salirse de las manos y conducir a más castigos de acuerdo con los libros de reglas.
Después del partido, por lo general, aún me despediría y expresaría mi desagrado tan cortésmente como pueda, pero porque cuando uno se equivoca, las emociones que lo acompañan pueden volverse increíblemente incontrolables, por lo tanto, es mejor mantener el control y no obtener castigado aún más.
¡¡¡Espero que esto ayude!!!
A 4400 W motor is used to do work. If the motor is used for 200 s, how much work could it do? (Power: P = W/t) 22 J 4200 J 4600 J 880,000 J
Answers
Answer:
880,000 J
Explanation:
P = W/t
4400 W = W / 200 s
W = 880,000 J
Answer:
880,000 J
Explanation:
How are EM waves similar?
They are all forms of light
They all have the same frequency
They all have the same energy level
Answers
Answer:
Electromagnetic waves have crests and troughs similar to those of ocean waves.
Explanation:
The distance between crests is the wavelength. hope this helps you :)
Um automóvel é dirigido ao longo de uma estrada caracterizada por zonas alternadas de velocidades permitidas de 40km/h e 60km/h. Se o motorista mantém rigorosamente essas velocidades nas respectivas zonas, e se todas as zonas têm o mesmo comprimento, qual a velocidade média em km/h, em um trecho correspondente a um número par de zonas?
Answers
Which condition must be met in order for an equation to be balanced?
Answers
Answer:
There must be an equal amount of each element on both sides of the equation. Hope this helps and please marks as the brainliest.
Explanation:
Answer:
The answer is D
Explanation:
Hope this helps!
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Explain how the diffraction of light shows that light behaves like a wave.
Answers
Answer:
Diffraction of light shows that light behaves like a wave. It involves the change in the direction of waves while passing through any obstacle. Diffracted light can produce fringes of light, dark or colored bands (Just like the rainbow which is also a light wave). Diffracted light has certain wavelength, amplitude , frequency and speed which are the basic characteristics of being a wave which shows that light actually behaves like a wave.
draw a burette filled with water to a volume of 28 cm³
Answers
Answer:
you have to draw one
Explanation:
Explanation:
the basic knowledge needed is having the image in your mind the rest will flow
Write
any
to increase
magnitude of current in dynamo
Answers
Answer:
Explanation:
It can be increased by: increasing the rate of rotation. Increasing the strength of the magnetic field. Increasing the number of turns on the coil.
Hope this helps
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What is a small sacle industry?
Answers
A person, with a mass of 50.0 kg, stands on a weighing scale in a lift which is moving
upwards with a uniform acceleration of 5.0 m/s
2
. What would be the reading on the
scale?
(A) 490 N (B) 250 N (C) 740 N (D) 240 N
Answers
Answer:
D
Explanation:
Because I just had that answer
What’s the meaning of Obesity
Answers
Answer:
over weight
Explanation:
being over weight
hope this helps
10). Three - fourth of the volume of a block which is floating in water extends above the surface
of the water. What is the density of the block?
Answers
Answer:
Explanation:
Fill the graduated cylinder partially with water to a level where you can submerge the object and drop the sinker weight into the water. If you don't have a graduated cylinder to fit your object, put a cylinder in a basin, fill it to the top with water and measure the overflow into the basin. Your answer will be less accurate because of the number of times the water has been moved. Note the amount of displacement in milliliters (ml) caused by the sinker and string.
Measure the mass of your object (say a cork) on a balance scale in grams (g). Be sure the object is dry when it is measured. Record its weight. Attach the sinker with the string to the object. If you use a staple or pin, be sure to include that when you measure the displacement of the sinker in step one.
a car travels 30 miles in two hours, what is its speed?
Answers
Answer:
15 mph
Explanation:
t ÷ d
time ÷ distance
30÷2
=15
Answer:
15 mph
Explanation:
Speed can be found using the following formula.
s=d/t
where d is the distance and t is the time.
The car traveled 30 miles in 2 hours. Therefore, the distance is 30 miles and the time is 2 hours.
d=30 miles
t=2 hours
s= 30 miles/2 hours
Divide 30 by 2
s=15 miles/hour
The car's speed is 15 miles per hour.
A gas baloon bursts when comes to a high altitude.... Plss answer it
Answers
Answer:yess
Explanation:as weather balloons travels from the earth's surface, the air pressure around ballons decreases slowly.As the air gets thinner,the gallons casing gets tighter.
This is due to gas expanding within balloon.The expanding gas causes the balloons to reach maximum height and it burst.
4. A train is travelling at a speed of 60 km/ h. Brakes are applied so as to produce a uniform
acceleration of −0.5 m /s2
. Find how far the train will go before it is brought to rest.
Answers
Answer:
33.33 m
Explanation:
Applying Newton's equation of motion,
v² = u²+2as...................... Equation 1
Where v = final velocity of the train, u = initial velocity of the train, a = acceleration of the train, s = distance.
make s the subject of the equation
s = (v²-u²)/2a................ Equation 2
Given: v = 0 m/s ( brought to rest), u = 60 km/h = 60(1000/3600) m/s = 16.67 m/s, a = -0.5 m/s²
Substitute this values into equation 2
s = (0-16.67)/-0.5
s = -16.67/-0.5
s = 33.33 m
Why are circuit breakers and fuses important?
Answers
Answer:
A fuse and circuit breaker both serve to protect an overloaded electrical circuit by interrupting the continuity, or the flow of electricity. ... Fuses tend to be quicker to interrupt the flow of power, but must be replaced after they melt, while circuit breakers can usually simply be reset.
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Describe each Newton Law.
Answers
Answer:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Explanation:
Provided the diameter of the fire hose is 7.0 cm, and the water running through the hose flows at 420 L/min, how much force does she need to hold the nozzle, if its diameter is 0.75 cm?
Answers
Answer:
the amount of force needed to hold the nozzle is 1100 N
Explanation:
Given that;
The diameter of the fire horse is 7.0cm
The radius of the fire horse is d/2 = 7.0/2 = 3.5 cm = 0.035 m
the water running through the hose flows at 420 L/min = 0.42 m³/ 60 sec
The diameter of the nozzle = 0.75 cm
The radius of the nozzle = d/2 = 0.75/2 = 0.375 cm = 0.00375 m
Amount of force needed to hold the nozzle = ??
Using equation of continuity product
[tex]A_1v_1 = A_2v_2[/tex]
where
[tex]A_1[/tex] = cross sectional area of the hose
[tex]v_1[/tex] = velocity of water flow at hose
[tex]A_2[/tex] = cross sectional area of the nozzle
[tex]v_2[/tex] = velocity of water flow at nozzle
Making [tex]v_1[/tex] the subject of the formula; we have
[tex]v_1 = \dfrac{A_2v_2}{A_1}[/tex]
Also making [tex]v_2[/tex] the subject of the formula:
[tex]v_2 = \dfrac{A_1v_1}{A_2}[/tex]
Also; from newton's law; we all know that F = ma
where ;
m = mass
a = acceleration
[tex]a = \dfrac{\Delta v}{t} \\ \\ a = \dfrac{v_2-v_1}{t}[/tex]
So ;
[tex]F = m \dfrac{v_2-v_1}{t}[/tex]
Also ; mass = density × volume
[tex]m =\rho *V[/tex]
[tex]F = \rho V \dfrac{v_2-v_1}{t}[/tex]
[tex]F = \dfrac{\rho V}{t}[ \dfrac{A_1v_1}{A_2}- \dfrac{A_2v_2}{A_1}][/tex]
Replacing [tex]A_2v_2[/tex] by [tex]A_1v_1[/tex] from above ; so
[tex]F = \dfrac{\rho V}{t}[ \dfrac{A_1v_1}{A_2}- \dfrac{A_1v_1}{A_1}][/tex]
[tex]F = \dfrac{\rho V}{t} A_1 v_1 [ \dfrac{1}{A_2}- \dfrac{1}{A_1}][/tex]
where the product of cross section area of velocity is equal to the volume of water and its time flow;
SO;
[tex]A_1v_1 = \dfrac{V}{t}[/tex]
Replacing that into what we have above; we have:
[tex]F = \dfrac{\rho V}{t} \dfrac{V}{t} [ \dfrac{1}{A_2}- \dfrac{1}{A_1}][/tex]
[tex]F ={\rho }( \dfrac{V}{t})^2 [ \dfrac{1}{A_2}- \dfrac{1}{A_1}][/tex]
Where;
A = πr²
[tex]F ={\rho }( \dfrac{V}{t})^2 [ \dfrac{1}{\pi r^2_2}- \dfrac{1}{\pi r^2_1}][/tex]
[tex]F ={(1000*10^3 \ kg/m^3) }( \dfrac{0.42 m^3 }{60 sec})^2 [ \dfrac{1}{\pi (0.00375)^2}- \dfrac{1}{\pi (0.035)^2}][/tex]
F = 1100 N
Thus; the amount of force needed to hold the nozzle is 1100 N
