Which of these quantities is constant in uniform circular motion?
A.speed
B.Velocity
C.acceleration
D.displacement

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 1.4 \times {2.2}^{2} \\ = 0.7 \times 4.84 \\ = 3.388 \: \: \: \: \: \: \: \: \: [/tex]

We have the final answer as

Hope this helps you

Answer:

im not sure

Explanation:

Answer:

Concept: Physics analysis

Answer:

the  moment of inertia is 380.14 kg-m^2

Explanation:

The computation of the moment of inertia is as follows:

The net moment of inertia is

= MR^2 ÷ 2 + m_p d_p^2 + m_d d_d^2

= 135 × 1.95^2 ÷2 + 63.7 ×  1.05^2 + 30.1 × 1.33^2

= 380.14 kg-m^2

hence, the  moment of inertia is 380.14 kg-m^2

We simply applied the above formula so that the correct value could come

And, the same is to be considered

Answer:

To investigate into how the height of a ramp affects the speed of a toy car rolled down a hill or slope because the higher the ramp the more Gravitational potential Energy (GPE), the more kinetic energy converted and the car will go faster. So the ramp increases, the velocity will also increase.

Explanation:

Answer:

[tex]a=16.32\ m/s^2[/tex]

Explanation:

Given that,

The radius of the track, r = 57 m

The speed of a race car, v = 30.5 m/s

We need to find the centripetal acceleration of the car. Its formula that is use to find it is given by :

[tex]a=\dfrac{v^2}{r}\\\\a=\dfrac{(30.5)^2}{57}\\\\=16.32\ m/s^2[/tex]

So, the car's centripetal acceleration is [tex]16.32\ m/s^2[/tex].

Answer:

4th

Explanation:

Answer:

4th

Explanation:

Answer:

T₂ = 36.36°C

Explanation:

The complete question is:

A 0.5 kg block of aluminum (Caluminum = 900J/kg*C)is heated to 200 C. The block is then quickly placed in an insulated tub of cold water at 0C (Cwater=4186J/kg*C) and sealed. At equilibrium, the temperature of the water and block are measured to be 20C.

A)     If the original experiment is repeated with a 1.0 kg {kg} aluminum block, what is the final temperature of the water and block?

Answer: We will apply the law of conservation of energy here:

Heat Loss by Aluminum Block = Heat Gained by Water

m₁C₁ΔT₁ = m₂C₂ΔT₂

where,

m₁ = mass of aluminum block

C₁ = Specific Heat Capacity of Aluminum Block = 900 J/kg °C

ΔT₁ = Change in Temperature of Aluminum Block

m₂ = mass of water

C₂ = Specific Heat Capacity of Water = 4186 J/kg °C

ΔT₂ = Change in Temperature of water

Therefore, for initial given condition:

m₁ = 0.5 kg

ΔT₁ = 200°C - 20°C = 180°C

m₂ = ?

ΔT₂ = 20°C - 0°C = 20°C

Therefore,

(0.5 kg)(900 J/kg °C)(180°C) = m₂(4186 J/kg °C)(20°C)

m₂ = 81000 J/(83720 J/kg)

m₂ = 0.97 kg

Now, we have the mass of water. So, we can solve for the final equilibrium temperature if the mass of block is changed to 1 kg. So, for the new state:

m₁ = 1 kg

m₂ = 0.97 kg

ΔT₁ = 200°C - T₂

ΔT₂ = T₂ - 0°C

T₂ = Final Equilibrium Temperature = ?

Therefore,

(1 kg)(900 J/kg °C)(200°C - T₂) = (0.97 kg)(4186 J/kg °C)(T₂ - 0°C)

180000 J  - (900 J/°C)(T₂) = (4050 J/°C)(T₂)

180000 J = (900 J/°C)(T₂) + (4050 J/°C)(T₂)

T₂ = (180000 J)/(4950 J/°C)

T₂ = 36.36°C

Answer:

The height of the platform is 22.686 m.

Explanation:

Given;

initial velocity of Janet, u = 2.63 m/s

time of her motion, t = 1.9 s

The height of the platform is given by;

h = ut + ¹/₂gt²

substitute the given values and solve for height "h"

h = (2.63 x 1.9) + ¹/₂(9.8)(1.9)²

h = 4.997 + 17.689

h = 22.686 m

Therefore, the height of the platform is 22.686 m.

Answer:

cell body → dendrite → axon → axon terminals

Explanation:

im in edgunity

Answer:

Explanation:To describe a damped harmonic oscillator, add a velocity dependent term, bx, where b is the vicious damping coefficient.

Answer:

it is being accelerated

Explanation:

Answer:

A

Explanation:

D. A beam balance does not measure mass; it measures weight. The gravitational force of attraction between the earth and an object depend on the mass of the object. ... The beam balance measures the force F exerted by the mass on the beam balance

Answer:

is it a spear

Explanation:

Answer:

The speed of waves on this wire is 329.14 m/s

Explanation:

Given;

tension of the wire, T = 650 N

mass per unit length, μ = 0.06 g /cm  = 0.006 kg/m

(convert the unit of mass per length in g/cm to kg/m by dividing by 10 = 0.06 / 10 = 0.006 kg/m)

The speed of waves on this wire is given as;

[tex]v = \sqrt{\frac{T}{\mu} } \\\\v = \sqrt{\frac{650}{0.006} }\\\\v = 329.14 \ m/s[/tex]

Therefore, the speed of waves on this wire is 329.14 m/s

Answer:

d. (1/8πε0)Q/a

Explanation:

The potential difference [tex]v = \dfrac{1}{4 \pi \epsilon _0} \dfrac{Q}{r}[/tex]

[tex]= (\dfrac{1}{4 \pi \epsilon _0}Q) \dfrac{1}{r}[/tex]

Suppose we separate the quantity [tex](\dfrac{1}{4 \pi \epsilon _0}Q)[/tex] which is dimensionally and equally the same as [tex](\dfrac{1}{8 \pi \epsilon _0}Q)[/tex]. Then, we will have [tex]\dfrac{1}{r}[/tex] and [tex]\dfrac{1}{a}[/tex] as the same dimension.

Therefore, the correct option is:

d. (1/8πε0)Q/a

Answer:

The momentum before collision and momentum after collision is equal in a frame of reference moving at 10.0 m/s in the direction of the moving car.

Explanation:

[tex]m_1[/tex] = Mass of moving car = 1990 kg

[tex]u_1[/tex] = Velocity of moving car in stationary frame = 20 m/s

[tex]m_2[/tex] = Mass of stationary car = 1540 kg

[tex]u_2[/tex] = Velocity of stationary car in stationary frame = 0 m/s

v = Combined velocity in stationary frame

Momentum conservation for stationary frame

[tex]m_1u_1+m_2u_2=(m_1+m_2)v\\\Rightarrow v=\dfrac{m_1u_1+m_2u_2}{m_1+m_2}\\\Rightarrow v=\dfrac{1990\times 20+0}{1990+1540}\\\Rightarrow v=\dfrac{3980}{353}\ \text{m/s}[/tex]

In frame moving at 10 m/s the velocities change in the following ways

[tex]u_1=20-10\\\Rightarrow u_1=10\ \text{m/s}[/tex]

[tex]u_2=0-10\\\Rightarrow u_1=-10\ \text{m/s}[/tex]

[tex]v=\dfrac{3980}{353}-10\\\Rightarrow v=\dfrac{450}{353}\ \text{m/s}[/tex]

Momentum before collision

[tex]m_1u_1+m_2u_2=1990\times 10+1540\times -10\\\Rightarrow m_1u_1+m_2u_2=4500\ \text{kg m/s}[/tex]

Momentum after collision

[tex](m_1+m_2)v=(1990+1540)\times \dfrac{450}{353}\\\Rightarrow (m_1+m_2)v=4500\ \text{kg m/s}[/tex]

The momentum before collision and momentum after collision is equal. So, the momentum is conserved in a reference frame moving at 10.0 m/s in the direction of the moving car.

Answer:

lol

Explanation:

lolllll i need points sorry

Answer:

False.

Explanation:

Given that if mechanical energy is converted to thermal energy, then the spring would not compress as far as it would otherwise. This will cause the spring constant to be lower than it really is.

This statement is false. Because if mechanical energy is converted to thermal energy, there will be distortions in the solid pattern of the spring. And this will make the spring to compress.

Also, no matter what may happen to the spring, the spring constant remains constant. That is, unchanged.

Answer:

B. Nuclear to Electrical

Explanation:

Atoms are split at power plants to create electricity. The energy conversion in this process is from nuclear to electrical energy.

Answer:

Add items to the box

Explanation: I did the test

Answer:

Add some Items to it.

Explanation:

A lever, wheel, inclined plane, pulley, wedge, screw, and axle are all types of simple machines.

A simple machine can be described as a mechanical device that changes the direction or magnitude of a force. The simplest mechanisms use mechanical advantage to multiply force. A simple machine such as Lever, Wheel and axle, Pulley, Inclined plane, Wedge, and Screw.

A simple machine utilizes a single exerted force to do work against a single load force. Ignoring friction, the work done is equal to the work done by the force.

Simple machines are termed the elementary "building blocks" of which all more complicated machines are composed. The mechanical advantage of a machine is the product of the mechanical advantages of the simple machines of which it is composed.

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Answer:

    λ = 482.05 nm

Explanation:

The diffraction phenomenon and the diffraction grating is described by the expression

         d sin θ = m λ

where d is the distance between two consecutive slits, λ the wavelength and m an integer representing the order of diffraction

in this case they indicate the distance between slits, the angle and the order of diffraction

         λ = [tex]\frac{d sin \theta }{m}[/tex]d sin θ / m

let's calculate

         λ = 1.00 10⁻⁶ sin 74.6 / 2

         λ = 4.82048 10⁻⁷ m

Let's reduce to nm

         λ = 4.82048 10⁻⁷ m (10⁹ nm / 1 m)

         λ = 482.05 nm

Answer:

λ = 7.333 x 10⁻⁷ m = 733.3 nm

Explanation:

We can use the formula of fringe spacing from Young's Double Slit Experiment, to find the wavelength of light:

Δx = λL/d

where,

Δx = fringe spacing = 1.6 cm = 0.016 m

λ = wavelength of laser light = ?

L = Distance between slits and screen = 4.8 m

d = slit separation = 0.22 mm = 0.00022 m

Therefore, using these values in the given equation, we get:

0.016 m = (λ)(4.8 m)/(0.00022 m)

λ = (0.016 m)(0.00022 m)/(4.8 m)

λ = 7.333 x 10⁻⁷ m = 733.3 nm

Answer:

75joules

Explanation:

Workdone = force x distance

workdone = 25 x 3

workdone = 75joules

Answer:

They both require the same amount of work.

Explanation:

Work is said to be done if the force applied to a body cause the boody to move through a distance. Mathematically;

Workdone = Force * Distance

Workdone = mass * acceleration due to gravity * Distance

For the 100kg sack lifted through a distance of 2m:

Workdone = 100 * 9.8 * 2

Workdone = 980 * 2

Workdone = 1960Joules

For 50kg sack lifted through a distance of 4m;

Workdone = 50 * 9.8 * 4

Workdone = 200 * 9.8

Workdone  = 1960Joules.

Since the workdone in carry both sack is the same, hence they both require the same amount of work.

Answer:

I wud respond no, actually it registers ur temperature

Answer:

Yes

Explanation:

This is a scientific model as it represents complex objects, events, and a physical process. It has detail and an image that is relevant and helps to understand the process if that's water cycle.

A circuit is complete when there is a continuous path for electricity to travel from one end of the energy source to the other end.

Electric circuit: a way for current to travel. A battery or generator, a device that provides energy to the charged particles that make up the current, a device that uses current, such as a lamp, an electric motor, or a computer, and the connecting wires or transmission lines make up an electric circuit. Ohm's law and Kirchhoff's rules are two fundamental laws that quantitatively define how electric circuits function.

Several categories are used to categorise electric circuits. One-way current only flows through a direct-current circuit. As in most residential circuits, an alternating-current circuit transports current that pulses back and forth repeatedly every second.

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Answer:

free points let's gooo