George is studying a mechanical wave. He counts thirty crests of the wave pass through a point in 10 seconds. If What is the frequency of this wave?
Select one:

2 Hz.

20 Hz.

3 Hz.

30 Hz.

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2