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Anonymous users2024-01-241) The volume of water after the electric water heater is filled with water:
v=30L=30×10-3
The quality of the water after the M3 electric water heater is filled with water:
m=ρv=1×103kg/m3
m330kg, heat absorbed by water in electric water heater:
Q suck. cm△t=
J/（kg?30kg (80 -20 ) = J, 2) with an electric heater to supply this heat, i.e., Q suction. PJ1800W
4200s=70min．
Answer: (1) If the water heater is full of rated capacity water, heat the water from 20 to 80 after the power is turned on, and it needs to be supplied.
J of heat; 2) To supply this heat, the electric water heater should work for 70min
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Anonymous users2024-01-23P= J
1800W4200s=70min．
Answer: (1) If the water heater is full of rated capacity water, heat the water from 20 to 80 after the power is on, and the heat of J needs to be supplied;
2) To supply this heat, the electric water heater should work for 70min
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No, try to buy one that can be disassembled, otherwise it will be dirty.
This is normal, okay, like that kind of living in the school, after the crutches are snapped, do you still take them away if you don't throw the toilet after the snap?