A physics student predicts based on the conservation of energy that if a pendulum is released from a height that it will return to the same height. If the student tests this hypothesis, explain what will happen and why?
A)
The pendulum is a closed system and will return to the same height
because of the conservation of energy. B)The pendulum is an open system will not return to the same height
because the conservation of energy does not apply.
C)
The pendulum is a closed system and will not return to the same height
because the potential energy will be transformed into kinetic energy.
D)The pendulum is an open system will not return to the same height
because of some energy is transformed into heat and absorbed by the
surroundings.

It’s D

Explanation:

Because I took the USA test prep and got it right

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.