Answer:
A) 9000 Joules
B) 450 Watts
Explanation:
Work equals change in energy:
W = ΔPE
W = mgΔh
W = (600 N) (15 m)
W = 9000 J
Power is work per time:
P = W/t
P = (9000 J) / (20 s)
P = 450 W
Electrical energy = Q x V
Energy = 2 x 40
= 80
The correct answer is B.
It would be difficult for plants to absorb and hard to drink
F = m*a
a = v/t
a = 9.0 m/s / 2.0 s
a = 4.5 m/s^2
F = 100 kg * 4.5 m/s^2
F = 450 N
Sig figs = 500 N?
Heat,that is when heat from fire or hot object heats