A piece of copper wire has a resistance per unit length of6.1510-3? /m. The wire is wound into a thin, flat coil of numerous turns that has a radius of0.180m. The ends of the wire are linked to a 12.0-V battery. Find out the magnetic field strength at the center of the coil.

Question2

Establish relative humidity if vapor pressure is 6mb and saturation vapor pressure is 24mb.

Find out relative humidity if vapor pressure is 12mb and saturation vapor pressure is 12mb.

Establish relative humidity if mixing ratio is 10g/kg and temperature is 25 degrees Celsius.

Question3

A student (m = 59 kg) falls freely from rest and strikes the ground. Throughout collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Suppose that the only force acting on him all through the collision is that due to the ground.