Answer:
The frequency of wave is 4 hertz.
Explanation:
Given,
wave length = 8m
speed of sound ( v) = 32 m/s
frequency ( f) = ?
we know,
v = f × lambda
or, 32 = f × 8
or, f = 32/8
or, f = 4 Hertz.
A place that is very close to the equator since the equator is closest to the sun.
Answer:
<u>735 J</u>
Explanation:
<u>Formula</u>
Gravitational Potential Energy (GPE) = mgh
<u>Given</u>
- m = 15 kg
- h = 5 m
- g = 9.8 m/s
<u>Solving</u>
- GPE = 15 x 5 x 9.8
- GPE = 75 x 9.8
- GPE = <u>735 J</u>
One of the common source is C. <span>Spraying crop fields with pesticides
After spraying the crops with pesticides, the waste will fall and absorbed by the ground.
This will contaminate all substance that exists (nutrients that needed by the plants) in that ground and make that area became toxic for years.</span>
