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larisa [96]
3 years ago
11

Which of the following represents a fully plastic collision? 1. Two billiard balls hit each other then move in opposite directio

ns. 2. Two train cars hit then detach. 3. A ball hits a wall with no loss of energy. 4. A bullet hits a block and becomes embedded. 5. None of these.
Physics
1 answer:
Nutka1998 [239]3 years ago
3 0

Answer:

Option (4)

Explanation:

There are two types of collision.

Perfectly elastic collision: the collision in which the momentum and kinetic energy is conserved. There is no loss of energy in other forms of energy.

Perfectly plastic collision: The collision in which the momentum is conserved and kinetic energy is not conserved. The two bodies stick after the collision.

Here, the bullet hits the block and then embedded in the block, it is the example of plastic collision.

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2) 1.5×10-2 m

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A 4.0 m length of gold wire is connected to a 1.5 V battery, and a current of 4.0 mA flows through it. What is the diameter of t
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Explanation:

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Length of gold wire, l = 4 m

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Resistance in terms of resistivity is given by :

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Also, V = IR

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\dfrac{V}{I}=\dfrac{\rho l}{A}

A is area of wire,

\dfrac{V}{I}=\dfrac{\rho l}{\pi r^2}, r is radius, r = d/2 (diameter=d)

\dfrac{V}{I}=\dfrac{\rho l}{\pi (d/2)^2}\\\\\dfrac{V}{I}=\dfrac{4\rho l}{\pi d^2}\\\\d=\sqrt{\dfrac{4\rho l I}{V\pi}} \\\\d=\sqrt{\dfrac{4\times 2.44\times 10^{-8}\times 4\times 4\times 10^{-3}}{1.5\times \pi}} \\\\d=18.2\ \mu m

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6 0
3 years ago
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Answer:

The magnitude of angular acceleration is 232.38\ rad/s^2.

Explanation:

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So, the magnitude of angular acceleration is 232.38\ rad/s^2. Hence, this is the required solution.

6 0
3 years ago
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