A catapult fires a 0.015kg stone at 70m/s. The spring constant of the catapult is 150N/M. Find the exrtention of the catapult.

What can you increase the strength of an electromagnet by

The energy equivalent of the rest mass of an electron is

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?