Two cylindrical containers are placed on a turntable. canister A is empty; canister B contains lead shots. each canister is the same distance r from the centre and the coefficient of static friction is uniform. what happens when the speed of the turntable is increased?

a) only the lighter container slides outward off the turntable; the heavier one stays on.
b) only the heavier container slides outward off the turntable; the lighter one stays on.
c) both containers slide off the turntable at the same turntable speed.
d) the lighter container slides inwards.
e) the heavier container slides inwards.

c) both containers slide off the turntable at the same turntable speed.

Explanation:

The greater the mass of the cylinder, the greater the centrifugal force acting on it. That makes up for the greater force needed to move the heavier cylinder.

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: