Which observations correctly describe the second law of thermodynamics? Check all that apply.

Thermal energy that is not used to do work is often released to the surroundings.

Thermal energy flows from a cooler object to a warmer object.

Thermal energy flows from a warmer object to a cooler object.

Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.

Thermal energy flows when two objects in contact have a temperature difference.

Answers: 1,3,4,5

a. Thermal energy that is not used to do work is often released to the surroundings.

c. Thermal energy flows from a warmer object to a cooler object.

d. Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.

e. Thermal energy flows when two objects in contact have a temperature difference.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

explanation:

to push or pull an object in a certain direction is known as force. a force in moving an object from one place to another.

force depends on the mass of an object. so, more is the mass of an object more will be the force required to move the object.

thus, we can conclude that the use of force to move an object is push or pull.