The speed of an automobile increases from 18.0 m/s to a speed of 30.0 m/s over a time period of 6.0 seconds. What is t average rate at which the speed of this car is changing (HINT: the acceleration) during this time period

Explain the consequences of this addiction to the brain tissue

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.