A crate of mass 50kg is pushed along a floor with a force of 20N for a distance of 5m. Calculate the work done. (Hint: use the basic math equation for calculating the work done by a constant force)

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?

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?