(12) 5) Explain, in terms of the definition of power, why energy consumption is
sometimes listed in kilowatt-hours rather than joules. What is the relationship
between these two energy units?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road