Which of the following statements describe the transfer of energy a. collision of atoms causing nuclear reactions b. a car speeding up from 5 mi/hr to 40mi/hr c. a weightlifter lifting 100 lb. bell from his chest to a certain hight d. a transformer stepping down the voltage of electricity in power lines

C. A weightlifter lifting 100 lb. bell from his chest to a certain height

Explanation:

When weight lifter lift the weight from one position to other higher position then in that case the weightlifter has to do some work in order to lift against gravity

That work is given as

here we know that force is F = mg

so here work done will be

so here the work done by the weight lifter is the potential energy stored in the weight which is lifted upwards.

So here energy is transferred by the weightlifter which is stored in the weight

b

explanation:

bc its just b

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me