The driver of a 1000. kg car looked down to check the text message that came in and didn't see that a 2000. kg truck in front had stopped.

a. After the collision, the truck travelled 10.0 m/s. What was the final
momentum of the truck?

b. After the collision, the car travelled 2.0 m/s. What was the final momentum
of the car?

c. What was the final momentum of the combination?

d. What was the initial momentum of the combination?

e. How fast was the car traveling before the collision?

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:

a displacement distance is size of displ