What is the cyclist'speed (a) to begin with (b)after the accelerates (3) Describe how the graph shows acceleration .
(4) Does the cyclist speed up more quickly than he slows down explain your answer .
(5)Describe the motion of the cyclist in terms of his velocity and acceleration during stage A, B,and D of the journey.
(6)Calculate the cyclist's acceleration during stage B and D .
(7)Calculate the distance covered during the whole journey. ​

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: