ICSE − Q & A

This one too-
The rate at which solar energy is received by every square metre of area directly facing the sun is 1400 W. A rectangular solar heater of side 2m by 2.5m working at 50% efficiency utilizes this energy to heat water filled completely in a cubical containers of side 1 m. What is the time required (in seconds) to raise the temperature of water by 1 degree Celsius. The heat capacity of the container assumed to be negligible and assume the sun to be directly overhead on the container.

Thanks

I miss the old res papers and the friends you could make here.

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