Simpson drives his car with an average velocity of 45.2 km/h to the east. How long will it take him to drive 149 km
on a straight highway?
Answer in units of h.
How much time would Simpson save by
increasing his average velocity to 95.9 km/h
to the east?
Answer in units of min

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:

the part of the wave he is travelling on is the crest

see earlier answer

attach the statements so i can answer : )