20 POINTS needs done ASAP!!!!!!!!
1. On which surface of a submerged object does the surrounding fluid exert pressure?
A. all surfaces
B. the top surface
C. no surfaces
D. the bottom surface
2. Is a ramp in a parking garage a type of simple machine?
A. Yes, it is a lever.
B. Yes, it is a wedge.
C. Yes, it is an inclined plane.
D. No, it is not a machine.
3. How is thermal energy different from heat?
A. They are different names for the same type of energy.
B. Thermal energy is a form of energy, while heat is a form of energy transfer.
C. Heat is a form of energy, while thermal energy is a form of energy transfer.
D. Thermal energy is measured in °K, while heat is measured in °C.
4. Why is trapped air a good insulator?
A. It reduces heat transfer.
B. It is actually a poor insulator.
C. It stops heat transfer.
D. It increases heat transfer.
5.How are first-class levers different from third-class levers?
A. First-class levers do not increase the input force.
B. First-class levers increase the input force.
C. First-class levers change the direction of the force.
D. First-class levers do not change the direction of the force.