What is the change in entropy of the ice when a 0.050-kg ice cube at 0°C melts? The latent heat of fusion for water is 80 cal/g
What will be an ideal response?
15 cal/K
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A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
A. a net force to the left. B. a net force to the right. C. a net force upwards. D. no net force but a slight shift of the inner conductor to the left and the outer conductor to the right. E. no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.
The temperature is such that the rms speed of nitrogen molecules is 900. m/s at 750. mm Hg pressure
If the pressure increases to 780. mm Hg while the temperature remains constant, what is the rms speed now? [Molecular weight of nitrogen molecule is 28.]
Why are star clusters ideal sites to study stellar evolution?
What will be an ideal response?
If three vectors add to zero, they must all have equal magnitudes
A) True B) False