GEAS CHAPTER 2 2

You are sitting in a frictionless barber chair. The barber decides to have some fun with you, so he spins the chair. As you spin, you find that you can slow down by extending your arms and legs. You have:

• Increased your angular momentum

• Decreased your angular momentum

• Increased your moment of inertia

• Changed the direction of the momentum vector

Which quantity is equal to the derivative of the velocity with respectol time?

• Instantaneous velocity

• Average acceleration

• Instantaneous acceleration

• Average velocity

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

• Velocity

• Momentum

• Impulse

• Acceleration

Which of the following statements is NOT true about acceleration?

• Acceleration is uniform for straight line motion

• For circular motion. Acceleration is constant in magnitude and direction

• Acceleration is uniform ifthe velocity changes by equal amount or equal time

• The average acceleration cannot be used in precise calculations unless the acceleration is uniform

When white light passes through a red plate of glass and then through a green plate of glass which one of the following things occur?

• The light is totally absorbed

• The light that emerges is a combination of red and green

• The light that emerges lacks only its red and green components

• The light that emerges is green

Ratio of incident to transmitted radiation through a grid ratio of patient dose with and without grid

• Bucky factor

• Damadian factor

• Grid ratio

• Roentgen equivalent

Which of hte folowing phrasescompletesthe folowing statement? The strength of hte electric field between two oppositely charged parallel plate

• Maximum midway between the plates

• Maximum near the positively charged plates

• Constant between the plates except near the edges

• Zero midway between the plates

Which of the following is true of the net force exerted on an object zero?

• The acceleration is zero and the velocity is zero

• The acceleration is zero and the velocity remains constant

• The acceleration is zero and the velocity is variable

• Both the acceleration and velocity are variable

Diffraction and interference demonstrate which of the folowing?

• Particle nature of light

• Wave nature of light

• Polarization of light

• Refraction of light

The liberation of heat by the passage of a current through an electric conductor due to its resistance is known as

• Joule's Law

• Joule's Effect

• Joule-Kelvin Effect

• Joule-Thomson Effect