A Lego train moves 1.25 m east and then 0.75 m west along its track in 8 seconds. Determine the average speed and the average velocity of the train

(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.)

Ascientific blank must be testable and capable of being proven false?

The radius of an atom is closest in size to a