Willie’s class found that the cart will move when pushed with 50 Newton’s of force. When Willie pushes on the cart with 10 Newton’s of force, why didn’t the cart move?

The cart does not move because it is applying the same force as Willie is applying to it. When he pushes with 50 N (Newtons) of force his force is greater than the cart's. When he pushes the cart with 10 N, the force he is applying and the cart is applying is equal.

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:

its c i just checked it