The orbit of a certain a satellite has a semimajor axis of 1.5 x 107 m and an eccentricity of 0.20. Its perigee (minimum distance) and apogee (maximum distance) are respectively:. a. 3.0 x 10^6 m, 1.2 x 10^7 m
c. 1.2 x 10^7 m, 1.8 x 10^7 m
c. 9.6 x 10^6 m, 1.8 x 10^7 m.
d. 1.0 x 10^7 m, 1.2 x 10^7 m.
e. 6.0 x 10^6 m, 9.0 x 10^6 m.

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

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.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell