Water flows from a pipe with large diameter into a pipe with smaller
The speed of the water in the small tube is
☑ greater than
☐ less than
☐ equal to
the speed in the large tube
Same situation. The pressure in the small tube is
☐ greater than
☑ less than
☐ equal to
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?
☐ closer to you
☑ farther from you
☐ same distance
In the reading assignment for today, Ralph noticed two different equations labeled "Bernoulli's Equation". One said, "P1 + ½ r v12 + rgh1 = P2 + ½ r v22 + rgh2", the other said, "P + ½ r v2 + 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?
They both represent conservation of energy. The first says that energy is conserved between two points of a flow. The second basically says that the total energy is constant, regardless of which two points you choose.
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