What does Newtons first law of motion say about objects at rest and objects in motion?

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?

Smallest intensity of a stimulus that you can detect 50 percent of the time is

The ability to make things happen is also called a. heat b. force c. matter d. energy