Assignment A copper wire of 3m length and 1mm diameter is subjected
to a tension of 5kg weight. Calculate the elongation produced in the
wire, if Young's modulus of elasticity of copper is 120G pa
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Which planet do you think would be easiest for humans to colonize some day?

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?