The acceleration due to gravity on the surface of mars is about one third the acceleration due to gravity on earth’s surface.
the weight of a space probe on the surface of mars is about?
a. one third its weight on earth’s surface.
b. nine times greater than its weight on earth’s surface.
c. three times greater than its weight on earth’s surface.
d. the same as its weight on earth’s surface.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

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?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the