A mouse being chased by a hawk runs back and forth along a straight hedge. First she runs for 5.0 seconds to the north at 3.3m/s, then for 2.0 seconds to the south at 6.1 m/s, then she dives into a hole. a. what is her average speed and her average velocity?
b. taking north as the positive direction, plot her velocity as a function of time
c. assume she starts at x=0, plot her position as a function of time.

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: