Is the star with the longest total lifetime also the farthest from earth? explain.

(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.)

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

What happens to an isotope during radioactive decay?