Answer:
<h2>The answer is 9 W</h2>
Explanation:
The power used by an object can be found by using the formula

w is the workdone
t is time taken
From the question we have

We have the final answer as
<h3>9 W</h3>
Hope this helps you
Radio waves have the lowest radiant energy, hope this helps :]
Answer:
1×10^2
Explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
As we know that :

Power, is in Meter. So divide focal length by 100
