Answer:

Explanation:
Work is given by the equation
. Plugging in given values, we get:
.
The number of oscillations of the toy in a second is 1.25.
<h3>What is frequency?</h3>
- This is the number of complete oscillation of an object is a given period.
The given parameter:
- Frequency of the toy, F = 1.25 Hz
The frequency of an object is calculated as follows;

where;
- n is the number of oscillations
- t is the time of motion
The number of oscillations of the toy in a second is calculated as follows;

Learn more about frequency here: brainly.com/question/10728818
Answer:1.) Mars
2.) Venus
3.)Craters
4.)Mercury
5.)Venus
6.)Another planet (hypothesis)
7.) Iron oxide
Explanation:
Answer:
made with the material that is water proof
Answer:
ultrasound: high pitch, above the human range of hearing, reflects back
infrasound: longitudinal waves, in the human range, low pitch
Explanation: