Assuming 50% efficiency, 150 kcals of chemical energy would result in of kinetic energy.
A.
50 kcals
B.
75 kcals
C.
100 kcals
D.
150 kcals

Please select the best answer from the choices provided.

A
B
C
D

the first, second, and fifth options

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

area of focus

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.