Initial temp
final temp.
hydrogen peroxide yeast
26.5 degrees c 38.8 degrees c
vinegar
baking soda 25 degrees c 21.3 degrees c
which one is endothermic? which one is exothermic? explain how you know.
cer.

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.

ya te mando la respuesta