The first law of thermodynamics is concerned with the conservation of

Q-1;  A car is moving along a straight horizontal road at a speed of 20 meters per second. The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 10 seconds. The mass of the car is:

1) 1250 kilograms

2) 2500 kilograms

3) 5000 kilograms

4) 10,000 kilograms

ANSWER: 2 -- 2500 KILOGRAMS

Q-2;  A girl throws a 0.1 kilogram ball at a wall. The ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces straight back with a velocity of 4 meters per second. The change in the momentum of the ball is:

1) 0.1 kilogram-meters per second

2) 0.4 kilogram-meters per second

3) 0.5 kilogram-meters per second

4) 0.9 kilogram-meters per second

ANSWER: 4 -- 0.9 KILOGRAM-METERS PER SECOND

Q-3;  A satellite of mass "M" is in orbit around the earth. If a second satellite of mass "2M" is to be placed in the same orbit, the second satellite must have a velocity

which is:

1) half the velocity of the first satellite

2) the same as the velocity of the first satellite

3) twice the velocity of the first satellite

4) four times the velocity of the first satellite

ANSWER: 2 -- THE SAME AS THE VELOCITY OF THE FIRST SATELLITE

Q-4;  Which of the answers listed below best completes the statement:

The rate at which any part of a wave travels from one place to another determines the wave's:

1) propagation velocity

2) period

3) amplitude

4) frequency

ANSWER: 1 -- PROPAGATION VELOCITY

Q-5;  A spring with a force constant of 100 Newtons per meter is loaded with a mass of 1.0 kilogram. The period of vibration of this system is:

1) .03 seconds

2) .06 seconds

3) .31 seconds

4) .63 seconds

ANSWER: 4 -- .63 SECONDS

Q-5; : The first instrument used for measuring temperature was the gas thermoscope invented by:

1) Galileo

2) Centigrade

3) Fahrenheit

ANSWER: 2 -- GALILEO

Q-6;  The first law of thermodynamics is concerned with the conservation of

1) energy

2) momentum

3) charge

4) matter

ANSWER: 1 -- ENERGY

Q-7; Which of the following best completes the statement: The calorie is the amount of heat needed to raise:

1) 1 gram of water 1 degree Celsius

2) 1 gram of water 1 degree Rankin

3) 1 kilogram of water 1 degree Celsius

4) 1 kilogram of water 1 degree Kelvin

ANSWER: 1 -- 1 GRAM OF WATER 1 DEGREE CELSIUS