Chapter 16, Fluids at Rest Video Solutions, Schaum's Outline of Applied Physics

Problem 1

The pressure of the atmosphere at sea level corresponds to which one or more of the following?
(a) $1.013 \mathrm{~Pa}$
(c) $1013 \mathrm{mbar}$
(b) $98 \mathrm{~N} / \mathrm{m}^2$
(d) $14.7 \mathrm{lb} / \mathrm{in}^2$

Nicole Wood

Numerade Educator

03:24

Problem 2

The output piston of a hydraulic press cannot exceed the input piston's
(a) displacement
(c) work
(b) velocity
(d) force

Prabhu Ramji

Numerade Educator

02:12

Problem 3

A $2-\mathrm{N}$ stone dropped into a lake sinks. The buoyant force on the stone is
(a) 0
(c) $2 \mathrm{~N}$
(b) less than $2 \mathrm{~N}$
(d) more than $2 \mathrm{~N}$

Baskar P

Numerade Educator

01:37

Problem 4

. Seawater has a density 3 percent greater than that of freshwater. A boat will float
(a) higher in seawater than in freshwater
(b) at the same level in seawater and in freshwater
(c) lower in seawater than in freshwater
(d) any of the above, depending on the shape of the boat's hull

Shahab Ullah

Numerade Educator

01:57

Problem 5

. The density of copper is $8.9 \times 10^3 \mathrm{~kg} / \mathrm{m}^3$. The volume of a $15 \mathrm{~g}$ copper bracelet is
(a) $0.6 \mathrm{~cm}^3$
(c) $17 \mathrm{~cm}^3$
(b) $1.7 \mathrm{~cm}^3$
(d) $134 \mathrm{~cm}^3$

Mirza Aslam Beig

Numerade Educator

02:22

Problem 6

. Ethanol has a specific gravity of 0.79 . One liter of ethanol weighs
(a) $0.79 \mathrm{~N}$
(c) $7.7 \mathrm{~N}$
(b) $1.3 \mathrm{~N}$
(d) $12.4 \mathrm{~N}$

Kartik Indoliya

Numerade Educator

09:20

Problem 7

A gallon of water and a gallon of antifreeze solution weigh, respectively, 8.4 and $9.2 \mathrm{lb}$. The antifreeze solution has a specific gravity of
(a) 0.095
(c) 0.91
(b) 0.80
(d) 1.1

Keenan Mintz

University of Miami

02:57

Problem 8

The air in a vertical cylinder $20 \mathrm{~cm}$ in diameter that is open at the top supports a $20-\mathrm{kg}$ piston. The absolute pressure on the air is
(a) 0.0064 bar
(c) 1.019 bar
(b) 0.062 bar
(d) 1.075 bar

Cathy Geisel

Numerade Educator

03:47

Problem 9

A restaurant lobster tank is filled with seawarer of density $1.03 \mathrm{~g} / \mathrm{cm}^3$ to a depth of $60 \mathrm{~cm}$. If there are no lobsters in the tank, the gauge pressure on its bottom is
(a) $6.1 \mathrm{~Pa}$
(c) $6.1 \mathrm{kPa}$
(b) $0.62 \mathrm{kPa}$
(d) $107.4 \mathrm{kPa}$

Kudakwashe Mapiki

Numerade Educator

03:10

Problem 10

Six lobsters are put in the tank of Question 16.9 and enough water is removed to keep its depth at $60 \mathrm{~cm}$. The gauge pressure on the tank bottom is now
(a) smaller
(c) greater
(b) the same
(d) any of the above, depending on the mass of the lobsters

Zulfiqar Ali

Numerade Educator

01:46

Problem 11

. A $20 \mathrm{~g}$ spoon is put into a dish filled with water to the brim, and $3.0 \mathrm{~cm}^3$ of water overflows. The weight of the spoon in the water is
(a) $0.03 \mathrm{~N}$
(c) $0.20 \mathrm{~N}$
(b) $0.17 \mathrm{~N}$
(d) $0.23 \mathrm{~N}$

Ajay Singhal

Numerade Educator

01:41

Problem 12

A wooden plank $2.5 \mathrm{~m}$ long. $40 \mathrm{~cm}$ wide, and $60 \mathrm{~mm}$ thick floats in water with $15 \mathrm{~mm}$ of its thickness above the surface. The plank's mass is
(a) $15 \mathrm{~kg}$
(c) $60 \mathrm{~kg}$
(b) $45 \mathrm{~kg}$
(d) $441 \mathrm{~kg}$

Akshaya Rs

Numerade Educator

02:03

Problem 13

A hydraulic press has an input piston $10 \mathrm{~mm}$ in diameter and an output piston $50 \mathrm{~mm}$ in diameter. An input force of $80 \mathrm{~N}$ gives an output force of
(a) $3.2 \mathrm{~N}$
(c) $400 \mathrm{~N}$
(b) $16 \mathrm{~N}$
(d) $2000 \mathrm{~N}$

Arun Bana

Numerade Educator

02:03

Problem 14

. Pushing the input piston of the press in Question 16.13 through $40 \mathrm{~mm}$ causes the output piston to be pushed by
(a) $1.6 \mathrm{~mm}$
(c) $40 \mathrm{~mm}$
(b) $8 \mathrm{~mm}$
(d) $200 \mathrm{~mm}$

Arun Bana

Numerade Educator