Posts by I

Total # Posts: 25

physics - waves
A five-slit system with 7.0 um slit spacing is illuminated with 630 nm light. Find the angular positions of the third and sixth minima.

physics
How much work does a refrigerator with a COP of 3.8 require to freeze 660 g of water already at its freezing point?

physics
The balloon contains 0.30 mol of helium starts at a pressure of 125 kpa and rises to an altitude where the pressure is 55.0 kpa, maintaining a constant 300 {\rm K} temperature. A)By what factor does its volume increase? B)How much work does the gas in the balloon do?

physics
How much energy becomes unavailable for work in an isothermal process at 440 K, if the entropy increase is 25 J/K

physics
You have exactly 1 L of ethyl alcohol at room temperature 23 C. You put it in a refrigerator at 4 C.What's its new volume?

physics
An open container holds ice of mass 0.540 kg at a temperature of -18.7 c The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 790 J/minute. The specific heat of ice to is 2100 J/kg . K and the heat of fusion for ice is 334 * 10^3 ...

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