Suppose scientists discover two new moons.The average surface temperature of one of the moons is –180°C, but the temperature can
2 answers:
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Answer:
Explanation:
As we know that area of the circle at any instant of time is given as
now in order to find the rate of change in area we will have
here we know that
rate of change of radius is given as
radius of the circle is given as
now we have
The amount of heat needed to increase the temperature of a substance by 
is given by
where
m is the mass of the substance
is its specific heat capacity
is the increase of temperature
The sample of silver of our problem has a mass of
. Its specific heat capacity is 
and the increase in temperature is
Therefore, the amount of heat needed is
where
m is the mass of the substance
The sample of silver of our problem has a mass of
Therefore, the amount of heat needed is