Adding Pressure to Fluids

Fluids and Dynamics WS #6

Name:______Block:____ Adding Pressure to Fluids!!! 1. Why might your eardrums “pop” when you quickly change altitude?

2. Why is water pumped into a submarine?

3. What happens when the weight of an object is greater than the buoyant force?

4. A spray bottle like the one shown here must first be pumped several times before it will be able to shoot water. (a) What is the purpose of the pumping?

(b) What is the role of air pressure in making water shoot from the bottle?

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5. Fill in the blanks! Use the terms in the vocabulary box to fill in the blanks. You can use each term as many times as necessary. You will not need to use all the terms. Vocabulary

1 atm Buoyant Float Lower 10 atm Convection Gravity Pressure 10 m Decreases Higher Rise Buoyancy Density Increases Sink a. In a tube filled with water, the pressure is ______at the top and______at the bottom. b. In a tube filled with air, the pressure is ______at the top and______at the bottom. c. For water, air, and all other fluids, pressure ______with depth. d. The pressure of air at sea level is called ______. e. With each 10 m that you go deeper in water than sea level, the pressure goes up by ______. f. The tendency for objects to rise or float in a fluid is called______. g. Buoyancy occurs because of differences in ______of the object and the fluid. h. Objects rise or float in a fluid because the fluid exerts a

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______force on them. i. If the ______force is greater than the force of______the object will rise. j. If the buoyant force is equal to the force of ______the object will ______.

6. Examine the following pictures and answer questions about them below Why is the fluid coming out of the bottom hole at a more forceful rate than that at the bottom?

a. b. i. There is 1 atm of pressure added to a diver at sea level, what about 10 m?

ii. How about the diver at 25 m?

7. Answer the following questions about buoyancy. The larger the arrow, the bigger that force is!

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Is the boat sinking of floating? Is the submarine sinking of floating

8. Matching!

9. Mrs. Hayward is going glamping (Fancy camping)! She wakes up in the morning to let the air out of her air mattress. She lies down on it and undoes the plug. Draw a diagram of Mrs. Hayward and indicate where the high and low pressure is.

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