A bar is 20 cm long. A 100 g mass is placed on one end and a 150 g mass on the other. Where is the balance point of the bar.

The slope of a velocity time graph over any interval of time gives the during that interval

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

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?