In my opinion,I think the answer is b.You can control variables more easily by doing different things for different purposes.
<span>It gains an electron.</span>
Answer:
<h3>The answer is 3 kg</h3>
Explanation:
The mass of the object 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>3 kg</h3>
Hope this helps you
Answer:
the time between successive meridian transits of the sum at a particular place