1. A school bus moves at 15 m/s relative to Logan standing on the street. If Harrison walks towards the front of the bus at 3 m/s relative to the bus, how fast is Harrison moving relative to Logan, observing
on the street?

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?