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san4es73 [151]
3 years ago
14

A wave has a frequency of 540 Hz and is traveling at 340 m/s. What is its wavelength?

Physics
1 answer:
EastWind [94]3 years ago
8 0

Answer:

wavelength of wave = 62.69 cm

Explanation:

Given

frequency of wave = 540 Hz = 540 s^{-1}

Speed of wave = 340 ms^{-1}

wavelength of wave = ?

We know that for all waves, the relationship between wavelength λ, frequency f and speed v is same and given by the equation:

v = fλ

Hence wavelength λ  = v/f

                                   = 340 ms^{-1} / 540 s^{-1}

                                   = 0.6296 m

                                    = 62.69 cm

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3 years ago
A 1,100kg car is going at 22 m/s. What force is needed to stop it in 20<br> seconds?
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3 years ago
A 20-kg child starts at the center of a playground merry-go-round that has a radius of 1.5 mm and rotational inertia of 500kg⋅m2
Lemur [1.5K]

Answer:

w = 0.189 rad/ s

Explanation:

This exercise we work with the conservation of the moment, the system is made up of the merry-go-round and the child, for which we write the moment of two instants

Initial

         L₀ = I₀ w₀

Final

          L_{f} = I w

         L₀ = L_{f}

         I₀ w₀ = I_{f} w

         .w = I₀/I_{f}   w₀

The initial moment of inertia is

        I₀ = 500 kg. m2

The final moment of inertia

         I_{f} = 500 + m r²

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Initial angular velocity

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6 0
2 years ago
suppose the same chest is at rest. you push it horizontally with force of 110N but it does not budge. What is the contact force
Radda [10]

Answer:

110 N

Explanation:

When a force is applied on a body and body does not move, it means the body remains at rest.

In this condition, there is a contact force between the body and the floor which is called static friction.

Th static friction force is a self adjusting force and comes into play when the body is at rest.

Here, the applied force is 110 N and the chest is not moving, that means a static friction force is acting between the chest and the floor. This static friction force is the force of contact between the chest and the floor. The static friction force is equal to the applied force when the body does not move.

So, the contact force between the chest and the floor is 100 N.

4 0
3 years ago
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