During light activity, a 70-kg person may generate 200 kcal
/h. assuming that 20% of this goes into useful work and the
other80% is converted to heat, calculate the temperature rise of
thebody after 1.00 h if none of this heat were transferred to
theenvironment.

Explanation:

m = Mass of person = 70 kg

c = Specific heat of human body =

= Change in temperature

Time taken is 1 hour

Heat is given by

The rise in temperature is

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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.