Alawnmower engine running for 20 min does 4,560,000 j of work. what is the power output of the engine? (power: p = w/t)

3800 w
228,000 w
91,200,000 w
547,200,000 w

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

You can decrease the resistance of a length of wire by

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples