If the satellite is travelling in the same direction as the earth, what is the interval between successive times at which it will appear vertically ahead to an observer at a
fixed point on the equator?
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Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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?