Two elevators, A and B, move at a constant speed. Elevator B moves with twice the speed of elevator A. Elevator B weighs twice as much as elevator ?A. Compared to the power needed to lift elevator A, the power to lift elevator B is

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..

no

explanation:

no i dont know how to solve this you should probably try to google the answer