<h2>
<em><u>Answer</u></em>:</h2>
<h3>A <u>measuring tape</u> can be used to measure the circumference of your waist.</h3>
Answer:
150J
Explanation:
work output/work input=100%
so just make work output the subject
Answer: Noise above 70 dB can cause hearing damage
Explanation:
Answer:
Thank you so much.
Explanation:
Please give me brainliest :) I will greatly appreciate it :D
Explanation:
Power is defined as the rate at which work is done in per unit time.
Mathematically, 
It is given that work done by engine is 4,560,000 J and time is 20 minutes.
There is 60 seconds in 1 minute. So, convert minutes into seconds as follows.

= 1200 seconds
Calculate power output of the engine as follows.
= 
= 3800 J/s
or, = 3800 Watt
Therefore, the power output of the engine is 3800 Watt.