A 0.35 kg tennis ball is traveling towards a brick wall with a velocity of + 1.2 m/s. The ball rebounds from the wall with a velocity of -2.9 m/s. Determine the change in momentum of the tennis ball during the collision.
O +1.4 kg m/s
O +2.8 kgm/s
O - 2.8 kg m/s
0 - 1.4 kg m/s

answer; ///i believe that the correct answer is (carbon); good luck

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:

pecialized keyboards