In the ionsphere , electrons execute 1.4×10^6 revolution in a second. Find the strength of the magnetic flux density B in this region ​

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

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

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.