A 10kg block of material is heated by an electric heater rated at 90w lf the temperature of the block rais by 15⁰c and no heat energy last to the surrounding for how many long is the heater switehed on
A 10kg block of material is heated by an electric heater rated at 90w lf the temperature of the block rais by 15⁰c and no heat energy last to the surrounding for how many long is the heater switehed on
Answer:
2.1 % 10kg heat ,.......,?
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