Solar Irradiance is1400 W/m squared?
What is the temperature of a square meter of sand and a square metre of water over an hour on a sunny day, if the mass of the substance is 100kg in each case.
What is the temperature of a square meter of sand and a square metre of water over an hour on a sunny day, if the mass of the substance is 100kg in each case.
za
Favorite Answer
You don't give us enough information, but energy input = 1400 x 3600 J. (Actually the solar constant at the earth's surface is nearer 1 kW per sq m).
Mass = 100 kg.
So the temperature rise (not temperature) is 1400 x 3600 /(100 x sp ht cap of either sand or water)
You put in the figures and do the rest.
A different approach is to equate the power input (1400 W) with the power radiated (= Stefan's constant x emissivity x temperature^4)
It isn't clear what you are actually asking.