What are the types of energy sources based on
time of replacement ? write down their names
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Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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.

As the distance from a magnet increases, what happens to the magnet force?