Answer:
<h3>The answer is 50 kg</h3>
Explanation:
The mass of the skater can be found by using the formula

f is the force
a is the acceleration
From the question we have

We have the final answer as
<h3>50 kg</h3>
Hope this helps you
Answer:
A,C,F/Air,water,orginisams in water
Explanation:
The correct answer is B. it measures the tendency of a radioisotope to decay radioactively.
The answer would be D. Good luck my dude
My guess is b for the question