In an exciting game, a baseball player manages to safely slide into second base. The mass of the baseball player is 77.7 kg and the coefficient of kinetic friction between the ground and the player is 0.48. If it took the player 1.6 s to come to rest. A. Find the magnitude of the frictional forceB. If the player takes 1.4s to come to rest what was his initial velocity
C. What was his initial velocity (in m/s)?

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:

c)as speed changes, wavelength and frequency change.

everything changes!