Two points are located on a rigid wheel that is rotating withdecreasing angular velocity about a fixed axis. point a islocated on the rim of the wheel and point b is halfway between therim and the axis. which one of the following statements concerningthis situation is true?
both points have the same centripetal acceleration.
both points have the same tangential acceleration.
the angular velocity at point a is greater than that of pointb.
both points have the same instantaneous angular velocity.
each second, point a turns through a greater angle than pointb.

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:

not too sure thinking all accelerations are pointed down

i believe the answer is electric potential.

explanation: