A boat motor propels a boat with a force of 7.4 x 103N at an avg. speed of 20. m/s. What is the power developed by the motor?

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.