The rate at which an object moves is called speed or velocity depending if the direction does or doesnt matter
Answer:
Magnetic field, B = 0.0196 T
Explanation:
A current of 0.6 amps flows through a solenoid 6500 turns and 25 cm long. What is the value of the magnetic field inside it?
We have,
Current, I = 0.6 A
Number of turns in the solenoid, N = 6500
Length of solenoid, l = 25 cm = 0.25 m
The magnetic field inside the solenoid is given by :

So, the value of the magnetic field inside the solenoid is 0.0196 T.
His average speed is 45 miles an hour