A tank of liquid is heated by a heater. The heater delivers 2.7MJ of energy in 30 minutes. what is the average power output of the heater?
assume 80% of the energy is delivered to the liquid. How long will it take to transfer 1MJ of energy to the liquid?
F.4 physics
2013-12-30 4:37 am
回答 (1)
2013-12-30 4:46 am
✔ 最佳答案
E=Pt2.7M=P*30*60
2700000=P*1800
P=1500
E=Pt
1M=1500*80%*t
t=833s (corr. to 3 sig. fig.)
收錄日期: 2021-04-29 19:38:26
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