Right angles to a horizontal magnetic field
A piece of wire with mass per unit length 68 {\rm g/m} runs horizontally at right angles to a horizontal magnetic field. A 6.4 {\rm A} current in the wire results in its being suspended against gravity.
What is the magnetic field strength?
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At what angle will the second intensity maximum occur if the incident radiation has a wavelength of 505. nm?
Calculate: (a) The amount of heat the pump captures from the ambient air over that period of time in kJ; (b) The coefficient of performance of the heat pump.
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