Advertising claims sometimes state that adding something mechanical to a car's engine will allow it to recover 100 percent of the energy that comes from burning gasoline. you should be skeptical of such claims because they violate thea. first law of thermodynamics. b. activation energy requirements of all chemical reactions. c. second law of thermodynamics. d. law of conservation of matter.

C. second law of thermodynamics.

Explanation:

One of the consequences of this law is that there is no process of energy transformation 100% efficient. Some energy will always be lost in in the form of heat, which will be used to raise the temperature of some engine component, or its surroundings, and we will not be able to take advantage of it.

you can cut your hand off if your not

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.