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Which best explains why Greg’s hands get warm as he holds a bowl of hot soup?

A
Thermal energy from the soup moves to Greg’s hands.
B
Heat energy is absorbed by the soup from Greg’s hands.
C
Thermal energy from the surrounding air moves to Greg’s hands.
D
Heat energy is created from the thermal energy in Greg’s hands.
42
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Which best describes a difference between electric current and static electricity?

A
Static electricity is continuous, and electric current is not continuous.
B
Electric current involves the movement of electrons, and static electricity involves the movement of protons.
C
Electric current is continuous, and static electricity is not continuous.
D
Static electricity involves the movement of electrons, and electric current involves the movement of protons.
43

Briana builds a circuit that has a resistance of 8 point 0 cap omega What voltage should she apply to have a current of 0 point 8 cap A ?

A
7 point 2 V
B
10 V
C
0 point 1 0 V
D
6 point 4 V
44

Which is an example of negative acceleration?

A
a snowboarder who increases speed when traveling downhill
B
a skateboarder who reduces speed when moving up a hill
C
a biker who maintains a constant speed through a race
D
a runner who fluctuates speed by increasing and decreasing speed
45

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 have no charge.
C
The objects have opposite charges.
D
The objects are both negatively charged.
46

A flashlight has a resistance of 2 point 4 cap omega What voltage is applied by the batteries if the current in the circuit is 2 point 5 cap A ?

A
4 point 9 V
B
0 point 9 6 V
C
6 point 0 V
D
1 point 0 V
47

Which best explains why no current is induced?

A
The magnet needs to be held above the coils of wire.
B
The wire needs to be straight, not coiled.
C
The magnet needs to be moved through the coils of wire.
D
The wire needs to be coiled less tightly.
48

Which best illustrates how the carrier wave would likely appear after pulse modulation?

A
Image with description A radio wave going left to right. The waves are wide and equal distance as well as equal distance above and below the middle line.
B
Image with description A radio wave going left to right. The waves are tightly close together and equal distance as well as equal distance above and below the middle line.
C
Image with description A radio wave going left to right. The lines are equal distance apart and equal distance from the middle line. Occasionally, a wave does not cross the middle line but instead arcs back making a double wave on one side of the line.
D
Image with description A radio wave going left to right. There are two sets of waves separated by a solid line. The lines are equal distance apart and equal distance from the middle line.
49

Which best describes the graph?

A
Linda started out moving, and then stopped moving after 6 seconds.
B
Linda never moved the entire trip.
C
Linda started moving away from the start point, and then moved closer.
D
Linda’s path results in a negative slope.
50

Marcus plucks at an outstretched coil and observes the wave motion. What is the motion of the particles in this kind of wave?

A
The particles will move side to side over large areas.
B
The particles will move up and down over small areas.
C
The particles will move side to side over small areas.
D
The particles will move up and down over large areas.

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