Answer:
B. Air
Explanation:
I'm taking the exam rn ^^
Answer:
The answer is option D. Stored in the chemical bonds.
Hope it helps............
Answer:
T= 4.24sec
Explanation:
We are going to use the formula below to calculate.

Where T is period
L is length of rod
g is acceleration due to gravity =
From the problem, the rod is pivoted at 1/4L which means that three quarter of the rod was used for the oscillation. lets call this

= 4.4625m
thus
T= 4.24sec
Answer:
<h2>
2.8×10^-3</h2>

<u>0.0028125N</u><u> </u>