If V_ab is the potential difference across the resistive coil of resistance R, Pis the power input to the coil, E is the energy required to boil a cup of water, and t is the time needed to heat a cup of water using the electric device, which of the following quantities are known in this problem?a. tb. Rc. Vabd. Rinte. Ef. Ig. Ph. E

3.2x10^7

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.