Water flows from a pipe with large diameter into a pipe with smaller
diameter.
The speed of the water in the small tube is

the speed in the large tube

Same situation. The pressure in the small tube is

the pressure in the large tube

A ping pong player puts "topspin"
on the ball as he hits it to you by causing it to rotate such that the top of
the ball is spinning towards you. Where will the ball strike the table compared
to if it were not spinning?

In the reading assignment for today, Ralph noticed two different
equations labeled "Bernoulli's Equation". One said, "*P*_{1} +
½ *r* *v*_{1}^{2}
+ *rgh*_{1} = *P*_{2}
+ ½ *r* *v*_{2}^{2}_{
}+* rgh*_{2}", the other said, "*P*
+ ½ *r* *v*^{2}
+ *rgh* = *C*". He wants to know how they can
both be the same equation when they look so different. And what does *C*
stand for, anyway? What
can you tell him?