Can somebody me again! picture attached

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.