Find the efficiency of a motor vehicle engine if at a speed of 45km/ h

the engine consumes 12 litres of

petrol per

100km

and develops a power of

16hp

. The density of the petrol is

0.8g / cm . The heat

value of petrol is

45kJ / g

Which is the most accurate name for the ionic compound cas?

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.

Based on this activity, is kinetic energy always transformed into potential energy?