Are the isotopes that make up the air we breathe stable or unstable?

Air flows upward in the wick of a lantern because of the liquid property called

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?