4. E
5. D
6. F
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Answer:
2,500 watts
Explanation:
I got this answer right on a test. I hope it works for you to.
Answer:
2.7 s
Explanation:
The period of the motion of a massless loaded spring is given by

where m is the mass of the load and k is the force or spring constant.
Using values in the question and converting to appropriate units,

For number one she is going to observe the contraction of the ballon
For number two she is going to observe the expansion of the ballon
Answer:
1.697s
Explanation:
We use the second equation of free fall under gravity as follows;

Since the ball fell freely, u = 0m/s, therefore equation (1) reduces to

Given that h is the total height the ball falls through in time t seconds.
However, according to the stated problem the ball falls halfway in 1.2s, this simply implies that the ball falls through a distance of
in 1.2s. Hence we can write the following, given that
;

We can now proceed to find the time t for which it falls through h = 14.112m as follows;
