A cloud of interstellar gas is rotating. Because the gravitational force pulls the gas particles together, the cloud shrinks, an
d, under the right conditions, a star may be formed. Would the angular velocity of the star be less than, greater than, or equal to the angular velocity of the rotating gas? Equal to
It is well known that a gas cloud is very vast in relation to the diameter of the star, and that is why the angular momentum is maintained, the angular velocity must increase as size decreases. This is why the star will rotate much faster than the angular velocity of the gas cloud.
Rate of a reaction is defined as the rate of change of concentration per unit time.
Thus for reaction:
The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.