How does an increase in thermal energy affect molecules? they stop moving. they begin to vibrate more. they decrease in temperature. they lose kinetic energy.

Option (b) is the correct answer.

Explanation:

When thermal energy of a substance increases then molecules of the substance start to vibrate more vigorously.

As a result, there will be increase in kinetic energy of particles. Also, force of attraction will decrease between the molecules.

Thus, we can conclude that an increase in thermal energy affect molecules as they begin to vibrate more.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000