Which pair of objects will have an attractive electric force?
Pair Object 1 Charge Object 2 Charge
A -2 -1
B -3 +1
C +3 +1
D +1 +2(1 point)
Responses
Pair A
Pair A
Pair D
Pair D
Pair C
Pair C
Pair B
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exam question.
Pair B
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Which statement regarding sound traveling in air is correct?
(1 point)
Responses
As the wavelength increases, the frequency also increases.
As the wavelength increases, the frequency also increases.
The frequency of a sound does not affect the speed at which it travels.
The frequency of a sound does not affect the speed at which it travels.
A loud sound travels faster than a quiet sound.
A loud sound travels faster than a quiet sound.
A wave with a shorter wavelength is always faster than one with a longer wavelength.
The frequency of a sound does not affect the speed at which it travels.
Which statement about the effect of temperature on the speed of sound is correct?(1 point)
Responses
Changes in temperature have no effect on the speed of sound.
Changes in temperature have no effect on the speed of sound.
As temperature increases, the speed of sound increases because the medium becomes denser.
As temperature increases, the speed of sound increases because the medium becomes denser.
As temperature increases, the speed of sound decreases because molecules in the medium collide less frequently.
As temperature increases, the speed of sound decreases because molecules in the medium collide less frequently.
As temperature increases, the speed of sound increases because molecules in the medium collide more frequently.