The motion of rolling down involves many factors like mass, radius, gravitation, etc.
This all indicates about the moment of inertia.
The moment of inertia is a measurement of how much the object resists angular rotation.
Inertia is a property of object by which it tries to come in to rest when an external force is applied on the object. When the object is rotating then in that case the inertia acting on the body , which tries to resist its motion is called moment of inertia.
It is calculated by Mass M, Radius R and Length L.
The moment of inertia of solid sphere is 2/5 MR²The moment of inertia of hollow cylinder is 1 ⁄2 M (r₂² + r₁²).The moment of inertia of hollow sphere is 2/3 MR²The moment of inertia of ring is MR²The moment of inertia of solid cylinder is 1/2 (MR²)As the moment of inertia is the resistance to rotational motion we see that the object with least moment of inertia will reach the bottom first.
Matching the two columns, we get:
a) Time taken to reach the bottom is maximum for ring.
We also know the larger the moment of inertia, the smaller is the angular acceleration.
b) Angular acceleration is maximum for solid sphere.
c) Kinetic energy at the bottom is same for hollow and solid cylinder.
d) Rotational kinetic energy is maximum for solid sphere.
Therefore, after matching all these columns we get that these are directly related to moment of inertia.
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The figure below shows a constant magnetic field in a circular region which is pointing out of the page and increasing in magnitude at a constant rate. The magnetic field vanishes outside of the circular region. Two closed loops appear in the figure, one entirely outside the circular region (but not encircling it), and another entirely inside the circular region. Which of the following statements concerning the two loops false? Neither of the two loops experiences a net force. Only the interior loop experiences forces which tend to crush it. Both of the loops have currents running clockwise around them. Both of the two loops experience induced electric fields.
The correct answer is c that is both of the loops have currents running clockwise around them.
Since loop inside the region has an increasing magnetic field so it has clockwise current but the loop outside the magnetic region doesnt have current.
Powering lamps or other electrical devices always involves creating a loop in which electrical current flows. A circuit is made up of various parts that are wired together.
The battery or another power source moves the circuit's current. In a current loop, a dc power source is used to supply the current signal, which then travels through the transmitter, controller, and back to the power supply in a series circuit.
It was decided at random that the current would pass from the positive terminal to the negative terminal. However, when electrons were later discovered, it was revealed that they had a negative charge attached to them. Consequently, the direction of electron flow is the opposite of the direction of flow of conventional current.
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Two construction workers are attempting to pull a slab of concrete off of the ground. Each of the workers are pulling up with a force of 225 n, while the slab of concrete applies a gravitational force of 400 n in the opposite direction, remaining stationary. If the pulling forces applied to the slab of concrete are assigned a positive value, what is the net force of the scenario, and in which direction will the slab of concrete move?.
The slab will travel higher if the pulling force, which is each 225 N, is given a positive number, increasing the scenario's net force to 50 N.
What is the force overall or net force?
The resultant force is the total force exerted on an item. It represents the total force applied on the item.
There are three factors at work on the slap concrete:
400 N of gravitational force
225 N of pulling power was used by one construction worker.
Construction workers' 225 N pulling power 2
These forces are working against one another. While the pulling forces exerted by the construction workers are acting upward, gravitational force is acting downward.
The construction workers' pulling forces are now given positive values. The gravitational force will be given a negative number since it operates in opposition to the pulling forces.
Thus, the force that results may be computed as follows:
225 - 400+ 225 = 50 N
50 N of positive force is the outcome. The slab will move in upward direction.
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in addition to friction and the pressure-gradient force, which other force is influential in the control of wind on earth?
In addition to friction and the pressure-gradient force, the other force which is influential in the control of wind on earth is Coriolis force.
What is Coriolis force?
The wind's direction is influenced by how the earth rotates on its axis. The Coriolis force is what is known as. It significantly affects the wind's direction of movement.
The pressure gradient force causes winds to cross isobars at right angles, however because of the rotation of the planet, winds are diverted from their intended course.The Coriolis effect, often known as the Coriolis force, is a deviation caused by the rotation of the earth.
As a result, according to Farrell's Law, winds in the northern hemisphere are diverted to the right of their route, whereas those in the southern hemisphere are diverted to the left. The air does not appear to have a deflection force until it is moved, and it grows with wind speed, air mass, and latitude.
In low-pressure locations, the wind blows around it because the Coriolis force and the pressure gradient force operate in opposition to one another. The pressure gradient force is perpendicular to an isobar (cyclonic conditions).
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the solid rod is subjected to the loading shown. determine the state of stress at point a, and show the results on a differential volume element located at this point.
A body's intrinsic ability to fend off the consequences of an external load is known as stress.
Find the stress levels at points B and C, and then display the findings on a differential volume element?A body's intrinsic ability to fend off the consequences of an external load is known as stress.The ratio of the applied force to the cross-sectional area is used to compute the normal stress, which acts perpendicular to the body's cross-sectional area.Rz=20kN is the standard reaction in the z-direction.Equation R x = describes the typical reaction in the x-direction.The formula for calculating normal stress is as follows:σ = F/AAxial and tangential stress are the two different forms. The only dimension (the radius, not the length) that is provided indicates that axial stress may be present. The area is therefore A = r2 =. (0.75 in) ² = 1.767 in².The result is that = F/A = 500 lb/1.767 in2 = 282.94 psi.
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if you plot the absorbance measurements of solutions vs. their concentrations, what is the slope equal to? select one: wavelength, for any path length molar absorptivity, if the path length is 1 cm wavelength, if the path length is 1 cm molar absorptivity, for any path length
If you plot the absorbance measurements of solutions vs. their concentrations, the slope is equal to molar absorptivity, if the path length is 1 cm
A = ε c l
A = Absorbance
ε = Molar absorption coefficient
c = Molar concentration
l = Optical path length
A ∝ ε c
Since A is only proportional to absorptivity and and not wavelength, out of the given options only option 2 is correct.
Therefore, if you plot the absorbance measurements of solutions vs. their concentrations, the slope is equal to molar absorptivity, if the path length is 1 cm
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for a mass oscillating on a spring, at what positions do the (a) velocity and (b) acceleration of the mass have their maximum values?
a)At the mean position
b)At the extremes positions
What is acceleration?At the equilibrium position, the acceleration (a) has zeroed out and the velocity is at its highest point. This varying acceleration, which is always pointed in the direction of the equilibrium position and is proportionate to the displacement from the equilibrium position, is what distinguishes simple harmonic motion.
given that the motion of the mass is oscillation.
1. The mass has its highest velocity and lowest acceleration at its average location.
There will be no net force acting on the mass.
2. In the extreme position, the mass's acceleration and velocity are both at their maximum.
There won't be zero net force acting on the mass.
Consequently, at the mean position and at the extreme positions.
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the mass of solute per 100 ml of solution is abbreviated as (m/v). mass is not technically the same thing as weight, but the abbreviation (w/v) is also common.
The mass of solute in step with a hundred mL of solution is abbreviated as m/v.
Mass is not technically the equal issue as weight, however, the abbreviation (w/v) is also commonplace. Mass percent: The mass percent is used to express the awareness of an answer whilst the mass of a solute and the mass of a solution is given: Mass percentage=Mass of SoluteMass of answer×one hundred%
Mass the fluid, locate its extent, and divide mass with the aid of extent. To mass the fluid, weigh it in a container, pour it out, weigh the empty box, and subtract the mass of the empty container from the full field. To locate the volume of the fluid, you simply degree it very carefully in a graduated cylinder.
The common mass of one H2O molecule is eighteen.02 amu. The number of atoms is a precise range, and the number of moles is a specific quantity; they do now not have an effect on the range of vast figures. The common mass of 1 mole of H2O is 18.02 grams. that is stated: the molar mass of water is 18.02 g/mol.
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sort each item into the appropriate bin according to whether it is more common in spiral arms or about equally common within and between the spiral arms in a spiral galaxy's disk.
Each item is sorted into whether it is more common in spiral arms or about equally common within and between the spiral arms in a spiral galaxy's disk
More common in spiral arms
Ionization nebulaeDense, dusty gas cloudsStar formationYoung starsEqually common within and between spiral arms
Old starsAccording to spiral density wave theory, spiral arms are a long-lived structure and rotate like a rigid body with a given pattern speed, while the stars rotate around the Galactic center with a velocity that depends on the radius of the orbit.
Therefore, each item is sorted above into whether it is more common in spiral arms or about equally common within and between the spiral arms in a spiral galaxy's disk
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The time to assemble a certain type of a computer board from a certain assembly line, has a normal distribution. The assembly times for a random sample of 20 boards are measured. The sample mean and sample standard deviation of observed times are: X &=35 minutes and s=2.2 minutes. a. Find a 90% confidence interval for the true average assembly time for a board. b. Find a 90% confidence interval for the true variance of assembly time F2. c. Find a 90% confidence interval for the true standard deviation of assembly time F.
The 90% confidence interval for the true average assembly time for a board is (34.19 minutes, 35.81 minutes).
What is average?
The ratio of a sum of the values in a given set to all the values in the set is the mean value, which is the definition of the average. The average formula has numerous practical uses. If we were asked to determine the average male height throughout India or the average age of the men and women in a group, we would add up all the data and divide it by the total number of data points. In mathematics, the central value of the a set of data is expressed as the average of a list of data.
A) The 90% confidence interval for the true average assembly time for a board is (34.19 minutes, 35.81 minutes).
B) The 90% confidence interval for the true variance of assembly time is (3.42 minutes, 7.06 minutes).
C) The 90% confidence interval for the true standard deviation of assembly time is (1.84 minutes, 2.65 minutes).
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How many bit strings of length n, where n is a positive integer, start and end with 1s?.
There is two possible bits 0,1
What is meant by positive integer ?The positive integers are the numbers 1, 2, 3,..., which are also known as counting numbers or natural numbers. Any number greater than zero is a positive number.
A positive integer is defined as a whole number greater than zero. All counting numbers are included in the set of positive integers (that is, the natural numbers).
If an integer is greater than zero, it is considered positive. Integer that is positive Numbers are either counting numbers or natural numbers (for example, 1, 2, 3,...). The set of positive integers and the set of natural numbers are the same. As a result, we can define a positive integer as any whole number greater than zero, such as 1, 2, 3, 4, 5, or 6.
First bit = 1 way
second bit=2 way...….nth bit=1 way so total=1*2*2............1=2^n-2 ways where n>=2
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What are the 7 types of electromagnetic waves in order of increasing frequency?.
They can be radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, in that order of increasing frequency/decreasing wavelength.
The radio, visible light, and X-ray wave frequencies are all included in the electromagnetic (EM) spectrum. All electromagnetic waves are composed of photons, which move through space before interacting with matter in one way or another. EM waves are all instances of the same phenomena, notwithstanding the sciences' broad classification of them into seven fundamental categories.
The lowest frequency waves in the electromagnetic spectrum are radio waves. Other signals can be transmitted by radio waves to receivers, which then convert them into useful data. There are many things that emit radio waves, both natural and man-made.
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which option best describes a wave moving faster?responses particles farther apart particles farther apart particles closer together particles closer together particles at low temperatures particles at low temperatures particles with low energy
The option that best describes a wave moving faster is when particles are closer together, 2nd option.
What increases the speed of a wave?Wave speed is determined by factors such as increase in temperature, frequency and the structure of the particles. When the temperature is increased the speed of waves increases but when reduced it lowers in speed.
Doubling the frequency of the source of the wave ensures an increase of wave speed and vise versa. Wave speed is travels faster in solid particles and slower in gas because they have closer packed particles.
The correct question is:
Which option best describes a wave moving faster?
responses:
particles farther apart
particles closer together
particles at low temperatures
particles with low energy
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Answer:
B particles are closer together
Explanation:
How would such a decrease effect the benefits on a salary of 54000?.
The Social Security payment might be reduced by 13% as one conceivable response to a declining Social Security payroll. Benefits would drop by $1,404 a year.
An example of a government benefitGovernment benefits include unemployment compensation, Supplemental Nutritional Support Program payments, Social Security benefits, and any other money or monetary value provided to a person by a Federal, State, or local government agency for the purpose of financial assistance.
An insurance check is what?A Benefits Check-up will inform you of your eligibility for assistance with Medicare premiums, prescription prices, utility bills, phone bills, and other charges. The programs for elder employment, property tax relief, home energy assistance, and nutrition and food stamp programs might also be included.
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What is the correct order of events in mitosis quizlet?.
The correct order of events in mitosis is prophase, metaphase, anaphase, and telophase.
Mitosis is the process by which a single cell divides to produce two daughter cells. The actual cell division occurs during this phase. This phase is also referred to as the M phase. The order of events involved in mitosis is:
Prophase: During this phase, the chromosome look condensed. At the end of the phase, the nuclear envelope, Golgi complex, and endoplasmic reticulum are not apparent.Metaphase: During this phase, the thick and coiled chromosomes start to line up on the metaphase plate.Anaphase: During this phase, the centromeres split and the chromatids start to separate. They then move towards the opposite poles.Telophase: During this phase, the chromosomes cluster at opposite spindle poles, and nucleolus, Golgi complex, and ER start to reform.To know more about mitosis:
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You are standing on an airless celestial body, one that is large enough to be approximately spherical. You have a cannon that you can adjust to launch a cannon ball at any speed you specify. Which of the following statements are true? Hint: There are 2 correct statements.
If you give it enough speed and aim it parallel to the ground the ball will go into a circular orbit. (Watch out, it may hit you in the back.)
If you launch the ball at low speed, it will move along an eccentric ellipse with the center of the body at one focus and most of the orbit underground.
If you give it enough speed and aim it parallel to the ground the ball will go into a circular orbit and provides angular acceleration is correct statement.
Angular acceleration is the rate of change of angular velocity over time. Radians per second is a frequently used measuring unit. Angular acceleration, also referred to as rotational acceleration, occurs when a body rotates. One can use a quantitative vector to express the change in angular velocity per unit of time.
An acceleration that is at an angle is a pseudo scalar. Positive angular acceleration is a rise in clockwise angular speed, whereas negative angular acceleration is a rise in counterclockwise angular speed. The acceleration vector is parallel to the plane of rotation since it is perpendicular to it. By increasing angular velocity clockwise, one can produce acceleration velocity that points away from the observer.
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How was radiogenic heat generated?.
The radioactive decay of elements within the Earth's mantle and crust outcomes in the production of daughter isotopes and the launch of geoneutrinos and warmth power, or radiogenic heat.
Sure elements, referred to as radioactive factors along with potassium, uranium, and thorium, damage down via a process known as radioactive decay, and release energy. This radioactive decay in Earth's crust and mantle constantly adds heat and slows the cooling of the Earth.
Radiogenic heating The thermal electricity released due to spontaneous nuclear disintegrations. in the Earth, the major isotopes concerned these days are of the factors uranium, thorium, and potassium, but diverse short-lived isotopes might also have been essential at some point in the early formation of the Earth.
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Two weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P. The tension in the wire is T.
In Above:
T = P
P = T + 25 N
P = T + 100 N
T > P
P + T = 125 N
P is closest to:
245 N
125 N
1225 N
25 N
187.5 N
T is closest to:
980 N
100 N
125 N
150 N
75 N
If two weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P and a tension in the wire is given by P = T + 25 N
For an object moving with constant speed,
a = 0
For 25 N object,
F = P - T - W
F = Net force
P = Pulling force
T = Tension force
W = Weight
W = 25 N
F = P - T - W
m a = P - T - 25 N
0 + 25 = P - T
P = T + 25 N
For 100 N object,
W = 100 N
F = T - W
0 = T - 100
T = 100 N
P = T + 25 N
P = 100 + 25
P = 125 N
Therefore,
P = T + 25 NP is closest to 125 NT is closest to 100 NThe given question is incomplete. The complete question is:
Two weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P. The tension in the wire is T. The weights are shown in the image attached.
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a nozzle with an area of 0.3 cm2 is attached to a garden hose with an area of 1.8 cm2. the flow rate through the nozzle is 0.18 l/s.
A nozzle with an area of 0.3 cm² is attached to a garden hose with an area of 1.8 cm². The flow rate through the nozzle is 0.18 l/s and the flow rate through the garden hose is 0.108* 10⁻³m³/s.
We know that the equation of continuity as Q = A*v
From the above equation, the relation between flow rate and area can be written as Q₁A₂ = Q₂A₁
Given that, flow rate of the nozzle Q₁ = 0.18 l/s = 0.18*10⁻³ m³/s
flow rate of the garden hose Q₂ = ?
area of the nozzle A₁ = 0.3 cm² = 0.3*10⁻⁴ m²
area of the garden hose A₂ = 1.8 cm² = 1.8* 10⁻⁴ m²
Substitute the values in the above equation,
0.18* 10⁻⁴* 0.18*10⁻³ = 0.3*10⁻⁴* Q₂
0.18* 0.18* 10⁻³ = 0.3*Q₂
Q₂ = 0.108* 10⁻³m³/s
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a 10 g bullet is fired at 400 m/s into a 10 kg wood block and becomes embedded. a. if the block sits on a frictionless surface, what is the velocity of bullet block? b. if instead the block sits on a wooden table with coefficient of friction
When a particle of mass m moves at speed v, its linear momentum is defined as... In a block of wood (m = 5.00 kg), a 10.0g bullet comes to a stop.
What is the speed of the bullet plus block right when it hits the ground?The projectile penetrates the block. Following the collision, the bullet and wood combination is moving at a speed of 0.600 m/s.
Does the bullet's change in momentum match that of the block of wood?The momentum of the block with the bullet after the hit will be equal to the momentum of the block with the bullet before the hit, per the law of conservation of linear momentum.
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42. two masses, one with mass m, and the other with mass 2m, are attached to a light rigid rod as shown below. when the system is released from rest, the rod begins to rotate with an angular acceleration of:
The rod rotates with an angular acceleration of [tex]\frac{g}{11L}[/tex].
Calculation:
We know,
Torque = I × α
Where, I = moment of inertia
α = angular acceleration
Now calculating the net torque on the system:
Net torque = 3mgL-2mgL = mgL (in clockwise direction)
So, moment of inertia of the system is:
I = 2m[tex]L^{2}[/tex] + 9m[tex]L^{2}[/tex] = 11m[tex]L^{2}[/tex]
So, I = 11m[tex]L^{2}[/tex] , T= mgL
and T = Iα
α = [tex]\frac{mgL}{11mL^{2} }[/tex]
α = [tex]\frac{g}{11L}[/tex]
Hence, [tex]\frac{g}{11L}[/tex] is the correct answer.
What is torque?
A force that can rotate an object about an axis is referred to as torque. Just as in linear kinematics, force drives an object's rate of motion, torque drives an object's rate of motion toward an angular acceleration.
As a vector quantity, torque exists. Based on the force acting on the axis, the torque vector's direction is determined.
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lift can be described as the difference in elevation between the surface of the static water supply and the:
The static lift, which only exists when the pump is not in use, is the vertical distance between the pump's Centre line and the elevation of the water source. the pump's elevation is lower than the water elevation,
There is a positive static lift. The static lift is negative if the pump is situated below the water's surface level. The term "vertical position," "vertical location," or "level" refers to a position along a vertical axis that is above or below a specific vertical datum (reference level).
The vertical distance between pressures is constant, and this is the static lift. However, certain systems could have a variable operating pressure that depends on the height of the system and the pump's Centre line.
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the first law of thermodynamics for a closed system can be characterized in words as a. (change in energy in a system)
first law of thermodynamics for a closed system can be characterized in words as a change in energy in a system zero.
what is first law of thermodynamics?The first law of thermodynamics, also known as the law of conservation of energy, states that energy can neither be created nor destroyed, but it can be changed from one form to another. According to this law, some heat given to the system is used to change the internal energy while the rest is used in doing work by the system.
The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system , plus the net work done on the system .
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when alpha particles of kinetic energy e are incident on nuclei of gold atoms, the smallest distance between an alpha particle and a nucleus is x. what is the smallest separation distance when the alpha particle kinetic energy is doubled to 2e
smallest separation distance when the alpha particle kinetic energy is doubled to 2e is x/2.
what is distant of closest aproach?The distance of closest approach of two objects is the distance between their centers when they are externally tangent. The objects may be geometric shapes or physical particles with well defined boundaries
At distance of closest approach speed of -particles is zero.At the instant of closest approach the initial kinetic energy of the particle will be completely converted into electric potential energy
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figure 8-19 gives the potential energy function of a particle. (a) rank regions ab, bc, cd, and de according to the magnitude of the force on the particle, greatest first. what value must the mechanical energy emec of the particle not exceed if the particle is to be (b) trapped in the potential well at the left, (c) trapped in the potential well at the right, and (d) able to move between the two potential wells but not to the right of point h? for the situation of (d), in which of regions bc, de, and fg will the particle have (e) the greatest kinetic energy and (f) the least speed?
Studying the graph of the Potential Energy of the particle,
(a))AB>CD=BC=DE
b)Mechanical Energy should not exceed 5 J
c)Mechanical Energy should not exceed 5 J
d)Mechanical Energy should not exceed 6 J
e)In region FG particle will have maximum Kinetic Energy
f)In region DE particle will have a minimum speed
(a) We know, x = -dU(x)/dx
The magnitude of the force is equal to the magnitude of the slope of the U(x) curve.
Consequently, the force's size increases with slope steepness:
AB > CD > BC = DE
(b) The particle is imprisoned and is unable to move past the location where its kinetic energy is zero or where its mechanical energy is equal to its potential energy.
So, the particle will be trapped within the left potential well if mechanical energy does not exceed 5 J.
(c) Particle will be trapped in the potential well at the right if mechanical energy does not exceed 5 J.
(d) Particle can move between the two potential wells but not to the right of point H if mechanical energy is between 5 J and 6 J, so it should not exceed 6 J.
(e) In the scenario in (d), the region FG is where the particle will have the most kinetic energy and the least potential energy.
(f) For the situation in (d) the particle will have the least speed where it has the least kinetic energy, which is where it has the greatest potential energy, which is in the region DE.
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TRUE/FALSE. two objects are said to be in thermal equilibrium. this means that the two objects have the same temperature have the same speed have the same thermal energy have the same pressure have the same internal energy
The two objects are said to be in thermal equilibrium when they have the same temperature, speed, pressure, and thermal and internal energy. This statement is true.
What is thermal equilibrium?When two components come into thermal contact but stop influencing one another’s temperatures, this is known as thermal equilibrium.
For example:
If a bottle of iced strawberry syrup is set on the table in the dining room, then the two objects are said to be in thermal contact. Meanwhile, they can be said to be in thermal equilibrium when the temperatures are the same after several hours.When a cup of hot coffee is on the table, then its temperature can be the same as the surrounding air after a period of time.Learn more about thermal equilibrium:
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A heavy dart and a light dart are launched vertically by identical ideal springs. Both springs were initially compressed by the same amount. There is no significant air resistance. Which of the following statements about these darts are correct? (There could be more than one correct choice.)
the light dart goes higher than the heavy dart
at maximum height, both darts have the same gravitational potential energy
The correct statement is that the light dart goes higher than the heavy dart when both are thrown vertically by identical ideal springs initially compressed by the same amount.
ReasoningWhen the same force is applied to bodies with different masses, different accelerations are achieved.
The force is directly proportional to the acceleration experienced by the body, and the constant of proportionality of the body used corresponds to its mass.
According to the formulaF = m. a
In a situation where there is no significant air resistance when a given force is applied to a body of mass m, the force is directly proportional to the acceleration experienced by the body, and the body's constant of proportionality used corresponds to its mass.
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What are 4 types of waves?.
The various types of electromagnetic waves are as follows: Radio waves, X-rays, microwaves, and ultraviolet rays.
A wave is a dynamic disturbance that propagates and causes one or more quantities to depart from equilibrium. Quantities may oscillate regularly around an equilibrium (resting) value at certain frequency if a wave is periodic.
A travelling wave is one in which the entire waveform moves in one direction; in contrast, a standing wave is one in which two periodic waves are overlaid and move in the opposing directions. In a standing wave, there are some points where the wave amplitude seems reduced or even zero, and these positions have null vibration amplitudes.
A wave equation (standing wave field comprising two opposing waves) or a one-way wave equation (for single wave propagation in a certain direction) is frequently used to describe waves.
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the motor of an elevator puts out 1,104 w of power. what is the mass of the elevator in kg if it lifts 135 m in 65 s at a constant speed? assume g
The mass of the elevator in Kilograms is 54.24 Kg.
The power applied by the elevator on the mass is 1104 W.
The height to which the mass is taken is 135m in the time period of 65 seconds.
We know,
Power applied is equal to the work done per unit time,
So,
P = MgH/t
Where, P, M, g, H and t are Power, mass, acceleration due to gravity, height and time respectively.
Now, putting values,
1104 = M x 9.8 x 135 / 65
M = 54.24 Kg.
So, the mass of the elevator is 54.24 kg.
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can hubbles law be used to determine the distance of a centauri star and other stars relatively near the sun
The right response is D because one can use Hubble's law to calculate how far a galaxy cluster is from its nearby neighbors.
What Hubble's law ?According to Hubble's law, the speed at which various galaxies are moving away from us is proportional to how far away they are from the Earth. This observation in physical cosmology. Edwin Hubble, an American astronomer, was the one who drafted the law.
He found that the distance between galaxies and our planet affects how quickly they move away from us. It is the first observable evidence of the universe's expansion and is frequently used as a partial justification for the Big Bang theory.
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What are the 3 types of waves?.
The three types of wave motions are transverse waves, longitudinal waves and surface waves.
The type of wave in which the motion of particles in a medium is perpendicular to the wave's direction is known as a transverse wave. Example of it is ripples on the surface of water.
The type of wave in which the motion of particles in a medium is in the same direction as that of a wave is known as longitudinal wave. Example of it is an electromagnetic wave.
The type of wave that occurs along the boundary of any two media or substances is called a surface wave. Example of it is a seismic wave.
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