The second law of thermodynamics states that thermal energy can flow from colder objects to hotter
a. by convectionb. only if work is done on the systemc. spontaneously
d. when thermal expansion takes place

The correct option is b.

Explanation:

The second law of the thermodynamics states that thermal energy can flow from the colder objects to hotter objects.

It is not possible to transfer heat from the colder body to hotter body without any work.

Energy will not flow spontaneously from the object at low temperature to an object at higher temperature.

Therefore, the correct option is b.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~