An l 1-m-long vertical copper tube ofinner diameter di 18 mm and wall thickness 1 2 mm contains liquid water at t 0°c. on a winter day air at v = 2.5 m/s, t, : -20°c is in cross flow over the tube. determine the heat loss per unit mass from the water when the tube is full of water, in w/kg. evaluate the properties of copper at 300 k. w/kg the tolerance is +/-2%

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

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