Adriver drives for 30.0 minutes at 80.0 km/h, then 45.0 minutes at 100 km/h. she then stops 30 minutes for lunch. she then travels for 30 minutes at 80 km/h. (a) sketch a plot of her displacement versus time and speed versus time. (b) calculate her average speed

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:

battery with hi vtge high val resist in series

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

1 is a answer of a question