. If force (F), work (W) and velocity (v) are taken as fundamental quantities. What is the dimensional formula of time (T)?

The dot diagram represents the motion of the motorcycle as it moves from left to right

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?

Convection currents are caused by differences in what two things?