AnswersFall 24 GSE Physical Science B ICElectric Charge

Electric Charge — Cumulative exam Answers

3 verified answers
41
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On a test, Helena is defining energy. Which must she include in order to get her answer marked correct?

A
making objects more compact
B
the ability to do work
C
carrying through matter and space
D
the bonds of atoms
42
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Two objects are held close together. When they are released, they move toward one another. Which conclusion is supported by this evidence?

A
The objects are both positively charged.
B
The objects are both negatively charged.
C
The objects have no charge.
D
The objects have opposite charges.
43

Which sound would most likely have the lowest pitch?

A
a bird chirping
B
a vacuum-cleaner running
C
a lawn mower running
D
a dog barking
44

Which best explains why a black T-shirt gets warmer in the Sun than a white T-shirt?

A
Darker colors reflect more energy from colliding particles than lighter colors do.
B
Darker colors absorb more energy from colliding particles than lighter colors do.
C
Darker colors reflect more energy from electromagnetic waves than lighter colors do.
D
Darker colors absorb more energy from electromagnetic waves than lighter colors do.
45

Which change will decrease the electric force between two positively charged objects?

A
moving them closer together
B
moving them farther apart
C
adding neutrons
D
removing electrons
46

Why do nuclear power plants use fission instead of fusion?

A
Scientists have not yet gotten a fusion reaction to happen on Earth.
B
Per gram of fuel, fission releases more energy than fusion.
C
The energy from fusion cannot yet be converted to electricity.
D
Fusion requires conditions that use too much energy to maintain.
47

Incisors (front teeth) act as wedges in the human body. Which change would increase the mechanical advantage of incisors?

A
a decrease in the distance of the teeth from the fulcrum
B
an increase in the distance of the teeth from the fulcrum
C
an increase in the thickness at the widest part of the teeth and no change in the length of the teeth
D
an increase in the length of the teeth and no change in the thickness at the widest part of the teeth
48

Which term refers to the ability to do work?

A
energy
B
power
C
force
D
motion
49

The thermal energy in a hot iron flows into a shirt. What can possibly be said about this situation?

A
The iron is warmer than the shirt.
B
The iron has less energy than the shirt.
C
The iron is 92°C and the shirt is 96°C.
D
The iron has less heat than the shirt.
50

A probe is launched from Earth and lands on Mars. The gravitational acceleration on Mars is 3.7 m/s2.

A
The mass of the probe remains the same, but the weight of the probe increases.
B
The mass of the probe remains the same, but the weight of the probe decreases.
C
The mass of the probe increases, but the weight of the probe remains the same.
D
The mass of the probe decreases, but the weight of the probe remains the same.

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