Q: Repeating experiments improves the likelihood of accurate results because the overall results are OPTIONS:
- less likely to prove the hypothesis correct.
- more likely to prove the hypothesis correct.
- less likely to be correct due to fewer errors being made.
- more likely to be correct due to fewer errors being made.
A: more likely to be correct due to fewer errors being made.

Within a substance, atoms that collide frequently and move independently of one another are most likely in a
OPTIONS:
- liquid.
- solid.
- gas.
- crystal.

gas.

Q: The students were told that the net applied force from the engine was the same for each vehicle tested. Based on this information, which vehicle had the greatest acceleration (a = F/m)? ---- OPTIONS:
- vehicle 1
- vehicle 2
- vehicle 3
- vehicle 4

A: vehicle 1

How does the tilt of Earth's axis and its rotation affect the weather?
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OPTIONS:
- The tilt of Earth allows Earth to absorb all of the Sun's radiation as it rotates.
- The tilt allows certain latitudes of Earth to be heated at a greater rate while Earth rotates.
- The tilt of Earth allows Earth to rotate fast enough to allow surface cooling to occur at night.
- The tilt allows energy to be evenly distributed throughout the atmosphere while Earth rotates.

The tilt allows certain latitudes of Earth to be heated at a greater rate while Earth rotates.

Question:
A 72 W navigation unit on a commercial aircraft has a 24 V power supply and uses 3 A of electric current. What is the electrical resistance of the navigation unit?
OPTIONS:
- 4 ohms
- 8 ohms
- 13 ohms
- 22 ohms
Answer:
8 ohms

*Question*: Signs in many stores and restaurants warn that microwaves are in use. What is the main reason for this warning? OPTIONS:
- Some people do not like food cooked in microwave ovens.
- Microwaves sometimes affect people's sense of sight.
- Microwaves sometimes cause hair or teeth to fall out.
- Some people have pacemakers that may be affected by microwaves.
*Answer*:
Some people have pacemakers that may be affected by microwaves.