energy at the rate of 400 watt. How many seconds do we need to start the second half of the match? coefficient of volume
energy at the rate of 400 watt. How many seconds do we need to start the second half of the match? coefficient of volume
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Transcribed Image Text:Two teams of robots are
playing a football match
with a copper ball. Tha
ball has a mass of 80 kg
and the volume is 4000
cm³. In the half time, we
3
found that the volume of
the ball is raised to 4005
cm3 . It was increased
due to the friction of the
ball with the metal field.
The second half of the
match would begin when
the temperature of the
Transcribed Image Text:ball comes back to the
initial temperature. If we
keep the ball, it losses
energy at the rate of 400
watt. How many seconds
do we need to start the
second half of the match?
coefficient of volume
expansion of copper =
%3D
50 x 10–6K-1
Specific heat of copper =
400Jkg¯'K-1
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