1. A plane travels at +390 km/h for 5 hours, and then at –450 km/h for 4 hours. Determine which of the following are true. a) The plane travelled a total distance of 3750 km
b) The plane finished 150 km away from where it started
c) The plane finished 3750 km away from where it started
d) At the end of the journey the plane was at a location that it had passed over earlier in the journey

2. Calculate the plane's average velocity over the 9 hours of the flight. Show your working and round your answer to one decimal place.

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:

a, c, d, e are all applying about success strategies.

show the wavelengths of a wave. show the crests of a wave.