Question

What is the period, T, of a wave produced by a tuning that makes 400 vibrations in one second? Group of answer choices

2.0 s
0.0025 s
0.005 s
10 s
5.0 s

Answer 1

T=0.0025s

Step-by-step explanation:

Vibrations per second is the definition of the S.I. unit Hertz (Hz), which is a frequency. This means that 400 vibrations in one second refers to a frequency of 400Hz. We can get our period T in seconds by using the formula T=1/f, which for our case is:

T=1/f=1/400Hz=0.0025s