Past Mechanics I Test

1.)Which object is elastic:

A spring
Gum
A rock

2.)How much does an object that displaces two pounds of water weigh underwater?

20 pounds
0 pounds
2 pounds

3.)Attraction between like substances is called what?

Cohesion
Adhesion
Stickyness

4.)What is heat?

A measure of temperature
A transfer of energy
A unit of energy

5.)When placed on the same stove with the same amount of heat being applied, iron will reach 100 degrees Celsius faster than water. Which has the higher specific heat capacity?

Iron
Water

6.)A good heat conductor has:

Loosely bonded outer electrons
Tightley bonded outer electrons

7.)The temperature of an object is:

Proportional to the wavelength the object radiates
Inversely proportional to the wavelength the object radiates
Does not depend on the wavelength the object radiates

8.)What change of phase is the opposite of evaporation?

Melting
Condensation
Solidification

9.)What is evaporation throughout a liquid called?

Condensation
Boiling
Extreme Evaporation

10.)What is the ideal efficiency of a heat engine with its resevoir at 100 degrees Celsius and its sink at 10 degrees Celsius?

10% efficient
110% efficient
90% efficient

11.)What is the speed of a wave with a wavelength of 1m and a period of 4s?

4 m/s
1 m/s
.25 m/s

12.)In what type of wave is the motion of the medium at right angles to the motion of the wave?

Longitudinal wave
Transverse wave
Sound wave

13.)In a standing wave, how many nodes are in one complete wavelength? (Assume that the beginning of the wave is a node.)

1
2
3

14.)What types of substances can trans m it sounds?

Elastic substances
Solids only
Gases only

15.)A sound wave hits a wall at an angle of 26 degrees. At what angle does it bounce off?

64 degrees
154 degrees
26 degrees

16.)What beat frequency will an object vibrating at 200 Hz make with an object vibrating at 180 Hz?

10 Hz
20 Hz
30 Hz