A wave having a frequency of 1000 Hz vibrates at

A) less than 1000 cycles per second.
B) 1000 cycles per second.
C) more than 1000 cycles per second.
D) none of the above


Answer: B

Physics & Space Science

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Slanting Surfaces Without Friction: A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?

What will be an ideal response?

Physics & Space Science

Some substances emit radiation without any need to expose the material to other energy sources. We call these substances

A. rotationally symmetric. B. thermal equilibrium. C. naturally radioactive. D. noble gases.

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Calculate the current through the feedback resistor for the circuit shown below if the input voltage is doubled.

a) 10mA
b) 2mA
c) 5mA
d) None

Physics & Space Science

Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?

A) Alpha B) Beta minus C) Beta plus D) Gamma E) X-rays.

Physics & Space Science