OAT OAT: Physics Principles Questions and Answers

Question 1

A ray of light travels from air (n ≈ 1.00) into a block of glass (n ≈ 1.50). Which of the following best describes the behavior of the light ray as it enters the glass?

Accepted Answer

It bends toward the normal.

Answer

It bends away from the normal.

Answer

It does not bend and continues along its original path.

Answer

It is completely reflected at the surface.

Question 2

A projectile is launched from the ground with an initial velocity at an angle above the horizontal. Neglecting air resistance, what is the vertical component of its velocity at the highest point of its trajectory?

Accepted Answer

0 m/s

Answer

Equal to the initial vertical velocity.

Answer

Equal to the horizontal component of velocity.

Answer

Equal to the initial launch speed.

Question 3

A resistor in a circuit has a resistance of 20 Ω and a current of 0.5 A flowing through it. What is the voltage drop across the resistor and the power it dissipates?

Accepted Answer

10 V, 5 W

Answer

5 V, 10 W

Answer

10 V, 2.5 W

Answer

40 V, 10 W

Question 4

Which of the following correctly ranks the given types of electromagnetic radiation from longest wavelength to shortest wavelength?

Accepted Answer

Radio waves, Infrared, Visible light, X-rays

Answer

Gamma rays, X-rays, Ultraviolet, Microwaves

Answer

Ultraviolet, Visible light, Infrared, Radio waves

Answer

Microwaves, Gamma rays, Radio waves, Infrared

Question 5

In a thermodynamic process, 500 J of heat is added to a system, and the system performs 200 J of work on its surroundings. What is the change in the internal energy of the system?

Accepted Answer

300 J

Answer

-700 J

Answer

-300 J

Answer

700 J

Question 6

A 10 kg box is pushed across a horizontal floor with a constant force of 50 N. A frictional force of 20 N opposes the motion. What is the acceleration of the box?

Accepted Answer

3.0 m/s²

Answer

5.0 m/s²

Answer

7.0 m/s²

Answer

2.0 m/s²