Critical mass depends on all of the following

a. the catalyst.
b. the polarity.
c. the shape.
d. the density.

check all that apply.
ples

The two required components for a generator are

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?