Answer the Questions:

1. You are watching a music concert and listening to the same concert with an ear bud. How far must you stand from the stage so that the sound waves and radio waves are synchronized in your ears?Assume that the radio wave must travel the circumference of the Earth before you hear it. Round your answer to the nearest whole number.

Circumference of the Earth = 40,000,000 m

Speed of light = 300,000,000 m/s

Speed of sound = 345 m/s

2. Centripetal Acceleration is:

a. Directly proportional to the velocity.

b. Directly proportional to the radius of curvature

c. Inversely proportional to the velocity.

d. None of the above

3. Which of these is not a state of matter

a. Solid

b. Liquid

c. Plasma

d. Ice

4. The velocity of sound in a certain medium is 1000 m/s. If sound wave has a frequency of 500 hz, the wavelength would be.

a. 200 m

b. 500 m

c. 1.2 m

d. 500,000 m

5. An X ray and a the red light from a laser

a. have the same frequency.

b. are types of electromagnetic waves.

c. need krypton to be produced.

d. have nothing in common

6. Ohm's Law states that:

a. Voltage = Current x Resistance

b. Voltage = Current / Resistance

c. Current = Voltage x Resistance

d. None of the above

7. Energy is measured in units of:

a. Watts

b. Newtons

c. Kelvin

d. None of the above

8. Which of the following is the Carnot Efficiency?

a. Work Output / Work Input

b. (Input Temperature - Output Temperature) / Input Temperature

c. Input Temperature / Output Temperature

d. Work Input / Work Output

9. In order to double kinetic energy, the speed should be

a. Increased by a factor of two

b. Increased by a factor of 1.414

c. Decreased by a factor of two

d. Decreased by a factor of 1.414

10. A diver climbs up the stairs to the diving tower. The work he does climbing the stairs is:

a. Equal to half his kinetic energy just as he hits the water

b. Equal to his kinetic energy just as he hits the water

c. Equal to half his potential energy just as he hits the water

d. Equal to his potential energy just as he hits the water

11. For a given person, as the time needed to run up a flight of stairs decreases, the power ___.

a. Increases then decreases

b. Decreases

c. Increases

d. Remains the same