The heliocentric model a. was developed by Ptolemy and supported by his mathematical equations. b. was supported by Johannes Kepler's observation that planets follow an elliptical orbit. c. states that the Earth is the center of the Universe, and the Moon and planets revolve around it. d. was widely accepted during the Middle Ages (about 476-1400 C. E.).

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.

total distance/total time

(85 + 82)/(5+3)

167/8

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