Heat absorbed to raise the temperature is given by
here
m = mass
c = 7.11 J/g C
Q = 138 KJ
Now by using the above formula we will have
So the amount of the substance will be 3.88 kg
We calculate the power as follows:
<span>P=C*v^3,
where C = constant and v is the velocity,
lets find the C first, from the given conditions
P = C*v^3
500= C(10)^3
C=500/(10)^3 = 0.5
</span>
P = 0.5 *(12)^3 = 864 kW
Hope this answers the question. Have a nice day.
At the center, when the bob is hanging straight down
True. His third law is that there is an equal and opposite reaction for every action.