Imagine a carnot engine has a hot reservoir of 680 k and a cold reservoir of 220 k. what is the efficiency of the engine? 58.3% 75.9% 62.3% 72.1% 67.6%

the other person's right, it's E. 67.6% for plato users :)

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.

answersysvol bloat;