Applied Physics

Dale Ewen, Neil Schurter, P. Erik Gundersen

Chapter 13

Fluids - all with Video Answers

Educators

Section 1

Hydrostatic Pressure

Problem 1

Find the pressure (in $\mathrm{lb} / \mathrm{in}^{2}$ ) at the bottom of a tower with water $50.0 \mathrm{ft}$ deep.

Prabhu Ramji

Prabhu Ramji

Numerade Educator

Problem 2

Find the height of a column of water where the pressure at the bottom of the column is $20.0 \mathrm{lb} / \mathrm{in}^{2}$

Prabhu Ramji

Numerade Educator

Problem 3

Find the density of a liquid that exerts a pressure of $0.400 \mathrm{lb} / \mathrm{in}^{2}$ at a depth of 42.0 in.

Prabhu Ramji

Numerade Educator

Problem 4

(a) Find the total force on the bottom of a water-filled circular cattle tank $0.750 \mathrm{~m}$ high with radius $1.30 \mathrm{~m}$ where the weight density of water is $98 \overline{0} 0 \mathrm{~N} / \mathrm{m}^{3}$
(b) Find the total force on the side of the tank.

Prabhu Ramji

Numerade Educator

Problem 5

What must the water pressure be to supply water to the third floor of a building (35.0 ft up) with a pressure of $40.0 \mathrm{lb} / \mathrm{in}^{2}$ at that level?

Susan Hallstrom

Susan Hallstrom

Numerade Educator

Problem 6

A small rectangular tank 5.00 in. by 9.00 in. is filled with mercury. (a) If the total force on the bottom of the tank is $165 \mathrm{lb}$, how deep is the mercury? (Weight density of mercury $=0.490 \mathrm{lb} / \mathrm{in}^{3} .$ ) (b) Find the total force on the larger side of the $\tan k$

Prabhu Ramji

Numerade Educator

Problem 7

Find the water pressure (in $\mathrm{kPa}$ ) at the 25.0 -m level of a water tower containing water $50.0 \mathrm{~m}$ deep.

Prabhu Ramji

Numerade Educator

Problem 8

Find the height of a column of water where the pressure at the bottom is $115 \mathrm{kPa}$.

Prabhu Ramji

Numerade Educator

Problem 9

What is the height of a column of water if the pressure at the bottom of the column is $95.0 \mathrm{kPa} ?$

Prabhu Ramji

Numerade Educator

Problem 10

What is the mass density of a liquid that exerts a pressure of $18 \overline{0} \mathrm{kPa}$ at a depth of $30.0 \mathrm{~m} ?$

Prabhu Ramji

Numerade Educator

Problem 11

What is the mass density of a liquid that exerts a pressure of $178 \mathrm{kPa}$ at a depth of $24.0 \mathrm{~m} ?$

Prabhu Ramji

Numerade Educator

Problem 12

(a) Find the total force on the bottom of a cylindrical gasoline storage tank $15.0 \mathrm{~m}$ high with radius $23.0 \mathrm{~m}$. (b) Find the total force on the side of the tank.

Prabhu Ramji

Numerade Educator

Problem 13

What must the water pressure be to supply the second floor (18.0 ft up) with a pressure of $50.0 \mathrm{lb} / \mathrm{in}^{2}$ at that level?

Prabhu Ramji

Numerade Educator

Problem 14

Find the water pressure at ground level to supply water to the third floor of a building $8.00 \mathrm{~m}$ high with a pressure of $325 \mathrm{kPa}$ at the third-floor level.

Prabhu Ramji

Numerade Educator

Problem 15

What pressure must a pump supply to pump water up to the 30 th floor of a skyscraper with a pressure of $25 \mathrm{lb} / \mathrm{in}^{2}$ ? Assume that the pump is located on the first floor and that there are $16.0 \mathrm{ft}$ between floors.

Prabhu Ramji

Numerade Educator

Problem 16

A submarine is submerged to a depth of $3550 \mathrm{~m}$ in the Pacific Ocean. What air pressure (in $\mathrm{kPa}$ ) is needed to blow water out of the ballast tanks?

Prabhu Ramji

Numerade Educator

Problem 17

A filled water tower sits on the top of the highest hill in a town (use Fig. 13.6 for Problems 17-21). The cylindrical tower has a radius of $12.0 \mathrm{~m}$ and a height of $50.0 \mathrm{~m}$.
Find the total force on the bottom of the water tower.

Prabhu Ramji

Numerade Educator

Problem 18

A filled water tower sits on the top of the highest hill in a town (use Fig. 13.6 for Problems 17-21). The cylindrical tower has a radius of $12.0 \mathrm{~m}$ and a height of $50.0 \mathrm{~m}$.
Find the total force on the sides of the water tower.

Prabhu Ramji

Numerade Educator

Problem 19

A filled water tower sits on the top of the highest hill in a town (use Fig. 13.6 for Problems 17-21). The cylindrical tower has a radius of $12.0 \mathrm{~m}$ and a height of $50.0 \mathrm{~m}$.
Find the pressure (in $\mathrm{kPa}$ ) on the bottom of the water tower.

Prabhu Ramji

Numerade Educator

Problem 20

A filled water tower sits on the top of the highest hill in a town (use Fig. 13.6 for Problems 17-21). The cylindrical tower has a radius of $12.0 \mathrm{~m}$ and a height of $50.0 \mathrm{~m}$.
What is the water pressure (in $\mathrm{kPa}$ ) at the fire station?

Prabhu Ramji

Numerade Educator

Problem 21

A filled water tower sits on the top of the highest hill in a town (use Fig. 13.6 for Problems 17-21). The cylindrical tower has a radius of $12.0 \mathrm{~m}$ and a height of $50.0 \mathrm{~m}$.
What is the water pressure (in $\mathrm{kPa}$ ) at the school?

Prabhu Ramji

Numerade Educator

Problem 22

A cylindrical grain bin $24.0 \mathrm{ft}$ in diameter is filled with corn whose weight density is $45.1 \mathrm{lb} / \mathrm{ft}^{3} .$ How tall can the bin be for the floor to support $94.0 \mathrm{lb} / \mathrm{in}^{2}$ of pressure?

Prabhu Ramji

Numerade Educator