Adodge stealth is driving at 57 mph on a highway. it passes a bmw going the same direction. the bmw is moving 11 mph backward relative the dodge. what is the velocity of the bmw? let the positive direction be forward. (show all work)

The speed of the BMW with respect to an inertial reference system is:

Where

= speed with respect to the inertial reference system (road)

= Speed of the mobile reference system with respect to the inertial system.

= Speed of the object in relation to the mobile reference system.

=?

= 57 mph

= -11 mph

mph

The speed of the BMW is 46 mph

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:

i think the answer would be reserve.