The water pressure to an apartment is increased by the water company. The water enters the apartment through an entrance valve at the front of the apartment.
Where will the increase in the static water pressure be greatest when no water is flowing in the system?
A) at a faucet close to the entrance valve
B) at a faucet far from the entrance valve
C) It will be the same at all faucets.
D) There will be no increase in the pressure at the faucets.
Question 2
A 5-kg ball collides inelastically head-on with a 10-kg ball, which is initially stationary. Which of the following statements is true? (There could be more than one correct choice.)
A) The magnitude of the change of velocity the 5-kg ball experiences is greater than that of the 10-kg ball.
B) The magnitude of the change of velocity the 5-kg ball experiences is equal to that of the 10-kg ball.
C) Both balls lose all their momentum since the collision is inelastic.
D) The magnitude of the change of velocity the 5-kg ball experiences is less than that of the 10-kg ball.
E) The magnitude of the change of the momentum of the 5-kg ball is equal to the magnitude of the change of momentum of the 10-kg ball.
Classification of blood pressure for adults age 18 and older
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