A fan cools the CPU in a computer.
Energy passes from one person’s hand to another person when they shake hands.
Warm air that is less dense rises to the ceiling of a room.
A snake’s body temperature increases when the snake lies in the sun.
The waves interfere with one another constructively and destructively.
The waves refract as they travel through the openings.
The waves reflect back and forth as they travel through the openings.
The waves change in frequency when they meet one another.
Showed how to make a compass point in a direction other than north
Was the first to show electric current flowing in a straight wire
Showed that electricity and magnetism are related
Proved that magnetism is an extremely weak force compared with electricity
The machine uses nuclear decay to treat a patient with radiation therapy.
The machine uses nuclear decay to generate diagnostic images of a patient.
The machine uses the photoelectric effect to introduce photons into a patient’s organs.
The machine uses the photoelectric effect to take pictures of a patient’s organs.
Reflects toward the lightbulb from the photoelectric surface
Ejects electrons from the photoelectric surface
Absorbs electrons from the photoelectric surface
Causes electrons to move from the lightbulb toward the photoelectric surface
Half as much
Two times as much
Four times as much
The strong nuclear force and the electromagnetic force are the same.
The strong nuclear force is weaker than the electromagnetic force.
The strong nuclear force is stronger than the electromagnetic force.
The strong nuclear force and the electromagnetic force are negligible.
The voltage across the resistor decreases until it becomes zero.
The voltage across the resistor increases until it reaches a constant value.
A fuse in the circuit blows after approximately 30 seconds.
The resistance decreases as the voltage increases.