You drop a rock in a pond, and the water waves travel away from the rock with a certain speed. You drop a heavier rock in the water. The speed of the waves in the water from the heavier rock

a. remains unchanged
b. increases
c. decreases
d. cannot be determined


A

Physics & Space Science

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Which of the following statements is true of the dynamo effect?

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A temperature of 0 Kelvin means there is essentially no motion at the atomic level.

Answer the following statement true (T) or false (F)

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Space telescopes looking for transiting planets look for small drops in brightness; these drops are:

A) less than 10%. B) less than 1%. C) less than 0.01%. D) less than 0.0001%. E) any size.

Physics & Space Science

A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC, and no other charges are present

(k = 1/4??0 = 8.99 × 109 N • m2/C2 ) The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to A) zero. B) 674 kV. C) 1130 kV. D) 3380 kV. E) 9380 kV.

Physics & Space Science