Answer: a = 1, b = 9, c = 6, d = 4
Explanation:
With no velocity, total mechanical energy is all gravity potential energy
PE = mgh = 80.0(9.81)(25) = 19,620 J = 1.96e4 J
Moment about D=0
or,T1*6a-5w*3a-9w*2a=0
T2+T1=5w+9w
Answer:
the formula is efficiency = output / input × 100%
The light must be either very dim or else non-existent.
We can't see the light wave or the label.