A 75-kg snowboarder has an initial velocity of 5.0 m/ s at the top of a 28° incline. After sliding down the 110-m long incline (on which the coefficient of kinetic -
friction is =0.18), the snowboarder has attained a velocity v. The snowboarder then
slides along a flat surface at the bottom of the slope (on which kinetic-friction is 0.15) and comes to rest after a distance "x".
• Use Newton’s second law to find the snowboarder’s acceleration while on the incline
and while on the flat surface.
• Then use these accelerations to determine x. A+ for shown work, thanks:)

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: