A car has an i total speed of 7m/s. it's speed increases by 21m/s. It took 2.1 seconds for the speed to change. What is the acceleration

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

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?

What causes the formation of ocean currents?