PHY..............
2006-12-26 10:16 pm
An ice-makignmachine takes away latent heat from water at 0'C at a rate of 800W . How many cubes of ice ( each of 12g ) can be formed in a minute ?
回答 (2)
2006-12-28 6:08 am
✔ 最佳答案
The energy that making ice cubes is:P=E/t
800=E/60
E=48000
The mass of the ice cubes is:
E=ml (f)
48000=3.34 X 10^5 X m
m=0.143712574...kg
We can be formed
m X 1000 / 12
=11.98760479
Therefore, 11 ice cubes can be formed in a minute.
2006-12-26 10:24 pm
用 E=Pt, E=800x60=48000
之後用E=mL... 張48000除左個L 就知有幾多kg，再x1000 轉番去g，then 除12
之後用E=mL... 張48000除左個L 就知有幾多kg，再x1000 轉番去g，then 除12
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