A thermal tap used in contain apparatus consist of a silica
rod, which fits inside at
aluminium tube whose internal
diameter is 8 mm out 0°c.
When the temperature is raised the
fit is no longer exact. Calculate
What change in temperature is necessary
to produce a channel whose cross-
Section is equal to that of a
tube of 1 mm internal
diameter.
Linear expansivity of stica = 8x10^-4 k^-1
Linear expansivity of Aluminium = 26x10^-4 k^-1

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:

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

a 2,000 calorie based diet.