Q: A submersible is at a depth of 3345 m in seawater with a density of $$1.03 \ \mathrm{g/cm^3$}. $$What is the pressure experienced by the submersible at this depth? (Use $$g = 9.8 \ \mathrm{m/s^2$}$$ and $$1 \ \mathrm{atm} = 1.013 \times 10^5$ \ \mathrm{Pa})$$

$$3.3 \times 10^7$ \ \mathrm{Pa}$$

Q: A column of mercury in a barometer is $$76.0 \ \mathrm{cm}$$ high. What is the atmospheric pressure in $$\mathrm{Pa}$$? (Density of mercury $$= 13,600 \ \mathrm{kg/m^3$}$$, $$g = 9.8 \ \mathrm{m/s^2$})$$

$$1.01 \times 10^5$ \ \mathrm{Pa}$$

Q: A pressure of $$1 \ \mathrm{bar} is $$equivalent to:

$$1.00 \times 10^5$ \ \mathrm{N/m^2$}$$

Question 1

Which of the following statements correctly distinguishes a fluid from a solid?

Accepted Answer

A fluid takes the shape of its container and can flow, while a solid maintains its own shape.

Question 2

A submersible is at a depth of 3345 m in seawater with a density of $$1.03 \ \mathrm{g/cm^3$}. $$What is the pressure experienced by the submersible at this depth? (Use $$g = 9.8 \ \mathrm{m/s^2$}$$ and $$1 \ \mathrm{atm} = 1.013 	imes 10^5$ \ \mathrm{Pa})$$

Accepted Answer

$$3.3 	imes 10^7$ \ \mathrm{Pa}$$

Question 3

Which equation correctly expresses the pressure at a depth $$h in a $$fluid of density $$\rho$$ under gravity $$g$$?

Accepted Answer

$$P = \rho g h$$

Question 4

An IV bag is used to administer fluid to a patient. If the blood pressure in the vein is $$18 \ \mathrm{mmHg}$$, what minimum height above the entry point should the IV bag be placed so that fluid enters the vein? (Assume fluid density $$= 1.0 \ \mathrm{g/cm^3$}$$, $$g = 9.8 \ \mathrm{m/s^2$}$$, $$1 \ \mathrm{mmHg} = 133 \ \mathrm{Pa})$$

Accepted Answer

$$0.29 \ \mathrm{m}$$

Question 5

Pascal’s Principle states that:

Accepted Answer

Pressure applied to a confined fluid is transmitted undiminished to every part of the fluid and the walls of the container.

Question 6

A hydraulic lift has a main cylinder of diameter $$2.00 \ \mathrm{cm}$$ and a secondary cylinder of diameter $$12.0 \ \mathrm{cm}. If a$$ $$2000 \ \mathrm{kg}$$ car is on the secondary cylinder, what force must be applied to the main cylinder to lift the car? ($$g = 9.8 \ \mathrm{m/s^2$})$$

Accepted Answer

$$272 \ \mathrm{N}$$

Question 7

Which of the following is NOT considered a classical fluid?

Accepted Answer

Ionized plasma

Question 8

A tire gauge measures the pressure inside a tire. If the gauge reads $$200 \ \mathrm{kPa}$$, what is the absolute pressure inside the tire? (Atmospheric pressure $$= 101 \ \mathrm{kPa})$$

Accepted Answer

$$301 \ \mathrm{kPa}$$

Question 9

Which of the following is the correct conversion for $$1 \ \mathrm{atm} to$$ $$\mathrm{mmHg}$$?

Accepted Answer

$$1 \ \mathrm{atm} = 760 \ \mathrm{mmHg}$$

Question 10

A column of mercury in a barometer is $$76.0 \ \mathrm{cm}$$ high. What is the atmospheric pressure in $$\mathrm{Pa}$$? (Density of mercury $$= 13,600 \ \mathrm{kg/m^3$}$$, $$g = 9.8 \ \mathrm{m/s^2$})$$

Accepted Answer

$$1.01 	imes 10^5$ \ \mathrm{Pa}$$

Question 11

Which formula correctly defines density ($$\rho$$)?

Accepted Answer

$$\rho = \dfrac{m}{V}$$

Question 12

A pressure of $$1 \ \mathrm{bar} is $$equivalent to:

Accepted Answer

$$1.00 	imes 10^5$ \ \mathrm{N/m^2$}$$

Question 13

Which of the following is a real-world application of Pascal’s Principle?

Accepted Answer

Hydraulic car lift

Question 14

If the pressure at the bottom of a swimming pool is $$120 \ \mathrm{kPa}$$ and the atmospheric pressure is $$101 \ \mathrm{kPa}$$, what is the gauge pressure at the bottom?

Accepted Answer

$$19 \ \mathrm{kPa}$$

Question 15

Which of the following best describes an amorphous solid?

Accepted Answer

A solid with a static orientation that technically flows very slowly

Question 16

A protein membrane in a cell is best described as:

Accepted Answer

Flows like a liquid but with static orientation like a solid

Question 17

Which of the following is the correct unit for pressure in the SI system?

Accepted Answer

$$\mathrm{N/m^2$}$$

Question 18

A barometer is used to measure atmospheric pressure. If the mercury column drops, what does this indicate?

Accepted Answer

Atmospheric pressure has decreased

Question 19

If a fluid has a density of $$1.0 \ \mathrm{g/cm^3$}$$, what is its density in $$\mathrm{kg/m^3$}$$?

Accepted Answer

$$1000 \ \mathrm{kg/m^3$}$$

Question 20

Which of the following is true about gases compared to liquids?

Accepted Answer

Gases can be compressed easily, while liquids cannot.

Fluids: Properties, Pressure, and Applications

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