The time taken by the runner to do the work is 1.42 seconds.
Given the data in the question;
- Work done;

- Power;

- Time elapsed;

<h3>Power</h3>
Power can be simply referred to as the quantity of energy transferred per unit time.
It is expressed as;

Where W is work done and t is time elapsed.
To determine the time it took the runner to do the work, we substitute our given values into the expression above.

Therefore, the time taken by the runner to do the work is 1.42 seconds.
Learn more about Power and Work: brainly.com/question/2962104
1.<span>from low potential to high potential
2. </span><span>A circuit is an unbroken loop of conductive material through which electrons flow continuously.
</span>3. There are two, a series circuit and a parallel circuit.
This is a series because they are all connected
Answer:
-78.4 cm
Explanation:
We can solve the problem by using the lens equation:

where
p is the distance of the object from the lens
q is the distance of the image from the lens
f is the focal length
Here we have
p = 80.0 cm
q = -39.6 cm (negative, because the image is on the same side as the object , so it is a virtual image)
Substituting, we find f:


This would be a cold front that forms when a warm air mass meets the area of a cooler air mass, although it should be noted that this doesn't always feel "cold".