If two carts collide, what type of collision will conserve both momentum and kinetic energy?
a. head on c. none
b. inelastic d. elastic
39. the impulse experienced by a body is equivalent to the body’s change in
a. velocity c. momentum
b. kinetic energy d. force

For the first one I believe it would be D. And for 39 it would be c

an energy transformation flow diagram is shown

where is it ?

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