Water heater

Problem by zainul abidin
30 Nov 1999 00:00 WIB
A water heater is powered by solar power. If the total area of the solar panel is $8 {\rm cm}^2$ and the powered delivered by the sunlight is $550 {\rm W/m}$, how long does it take to increase the temperature of $1.0 {\rm m}^3$ of water from $20.0^o$ C to $40.0^o$ C?