The evolution from subgiant to red giant As you learned in Part B, a nonburning helium core surrounded by a shell of hydrogen-burning gas characterizes the subgiant stage of stellar evolution. As time goes on, the star continues to evolve, and eventually, it becomes a red giant. Rank the stages a star goes through as it evolves from a subgiant into a red giant, from latest to earliest.
Rank the stages a star goes through as it evolves from a subgiant into a red giant, from latest to earliest.
a) The shell of hydrogen surrounding the star's nonburning helium core ignites.
b) Pressure in the star's core decreases.
c) Pressure from the star's hydrogen-burning shell causes the nonburning envelope to expand.
d) The star's nonburning helium core starts to contract and heat up.
e) The star becomes a red giant.
f) The surface of the star becomes brighter and cooler.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

measure their densities same density, same sub

pecialized keyboards

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.