A heat engine is a device that uses heat to produce useful work.
C. is correct. when you make a pizza, you see the the meat or pepperoni or cheese heating up and sometimes melted. (thats physical). on the inside the crust in heated and the toppings are cooked (chemical)
Force. Force is measured by newtons, probably because he came up with the equations to calculate force.
Hope this helps!
Answer:
They are Transverse Waves.
