Alawnmower engine running for 20 min does 4560000 j of work. what is the power output of the engine? (power: p = w/t) a: 3800 w b: 228,000 w c: 91,200,000 w d: 547,200,000 w

Power output, P = 3800 watts

Explanation:

It is given that,

Work done by the lawnmover engine, W = 4560000 J

Time taken, t = 20 min = 1200 sec

We have to find the power output of the engine. Power of an engine is given by work done per unit time taken i.e.

P = 3800 Watts

Hence, the power output of the engine is 3800 watts.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

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