Gravity decreases with distance. which statement is also true?
orbital speed increases with distance.
orbital speed decreases with distance.
orbital speed remains constant with distance.
orbital speed varies based on the functions of friction.

Phase changes are chemical changes. true or false

(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 is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?