SC 101 Test 2

Total Flash Cards » 25
 
1. 

When a chocolate bar is cut in half, its density is

 

unchanged

 
2. 

If the volume of an object were to double while its mass stays the same, its density would

 

half

 
3. 

Water pressure is greatest

 

against the bottom of a submerged object

 
4. 

Pumic is a volcanic rock that floats. Its density is

 

equal to the density of water

 
5. 

The reason that buoyant force acts upward on a submerged object is that

 

upward pressure against the bottom is greater than downward pressure against the top of the submerged object

 
6. 

What is the buoyant force acting on a 10 ton ship floating in the ocean?

 

10 tons

 
7. 

When gas in a container is squeezed to half its volume and the temperature remains the same, the gas pressure

 

doubles

 
8. 

Atmospheric pressure is caused by

 

weight of the atmosphere

 
9. 

A rising balloon is buoyed up with a force equal to the

 

weight of air it displaces

 
10. 

Temperature is related mostly to the

 

average molecular kinetic energy in a substance

 
11. 

The lowest temperature possible in nature is

 

-273*C

 
12. 

Heat energy is measured in units of

 

both Joules and calories

 
13. 

As a system becomes more disordered, entropy

 

increases

 
14. 

A substance that heats up relatively quickly has a

 

low specific heat capacity

 
15. 

The column of mercury in a mercury thermometer would rise when the temperature

 

increases

 
16. 

A substance can absorb heat energy by the process of

 

conduction, convection, and radiation

 
17. 

You're served coffee at a restaurant before you're ready to drink. In order for it to be the hottest when you're ready, add cream

 

right away

 
18. 

If you want to cook eggs by boiling them while in the mountains, then compared to sea level cooking, you should

 

boil the eggs for a longer time

 
19. 

The unit of electric charge, the coulomb, is the charge of

 

a specific large number of electrons

 
20. 

When the distance between two charges is halved, the electrical force between the charges

 

quadruples

 
21. 

The electrical force on a 2C charge is 60N. What is the value of the electric field at the place where the charge is located?

 

30 N/C

 
22. 

If you use 10J of work to push a coulomb of charge into an electric field, its voltage with respect to its starting position is

 

10V

 
23. 

An ampere is a unit of electrical

 

current

 
24. 

the current through a 10 ohm resistor connected to a 120V power supply is

 

10.0A

 
25. 

A 10 ohm resistor has 5A current in it. What is the voltage across the resistor?

 

50V