A person is pulling a wagon of heavy rocks for the garden with a force of 12 N. Another person wants to help and pushes the wagon from behind with a force of 8 N. The frictional force is 6 N. What is the net force on the wagon?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc