62 liters or 62.640 if you need decimal.
The answers penciled in on the sheet are fine ... 1500 Hz and 0.0006 sec.
If you want to get super-technical about it, you could count the number of full cycles on the WHOLE graph, from one side to the other. At the right end, near 0.01 sec, you can notice an extra 1/4 of a cycle there. So it's actually 15 and 1/4 cycles in 0.01 sec.
That makes the frequency (15.25 cycles) / (0.01 sec) = 1,525 Hz .
and the period ( second / 1525) = 0.000656... second.
But I think it would be OK if you didn't do that, and just call it 1500 Hz and 0.0006s.
The difference is only 1.6% , and the engineer in me says that's not enough to worry about.
Answer:
Input power, Ip = 4 Watts
Explanation:
Given the following data;
Power output = 0.8 Watts
Efficiency = 20%
To find the power input of the sunlight onto the solar panel;
Mathematically, the efficiency of a machine is given by the formula;
Substituting into the formula, we have;
Cross-multiplying, we have;
Input power, Ip = 4 Watts
Depends .. are you having surgery ?
