Penzias and wilson’s discovery of the cosmic microwave background (cmb) is a nice example of scientific serendipity—something that is found by chance but turns out to have a positive outcome. what were they looking for and what did they discover?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Why is the use of carbon-14 limited

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr