The impulse formula allows us to relate the concepts of mass and velocity (an objects momentum) to that of: 1: The motion of an object
2: An objects position in space
3: force acting on an object over time
4: the direction an object travels

3: force acting on an object over time

Explanation:

The impulse formula is: change in momentum = force x time

Δp = f x t

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:

real, smaller and upside-down.   so the answer should be b.