Question

1. what is the frequency of an object that has 4 crests every 2 seconds?

0.5 hz
-0.5 hz
2 hz
-2 hz

Explanation:

Step1: Recall frequency formula

Frequency \( f \) is the number of cycles (or crests, in this case) per unit time. The formula is \( f=\frac{\text{number of crests}}{\text{time}} \).

Step2: Substitute values

Number of crests = 4, time = 2 seconds. So \( f = \frac{4}{2}=2 \) Hz. Frequency is a positive quantity as it represents the rate of occurrence, so negative values are invalid here.

Answer:

2 Hz (the option with "2 Hz")