Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 4AC
Wind tunnels are used to measure the aerodynamic properties of prototype models. (a) If a fan generates a wind speed of 25.0 mi/h inside an 8.75-ft2 section of a wind tunnel, what is the wind speed as the air enters the narrower, 4.35-ft2 section of the wind tunnel? (b) Explain why it is often windier on city streets surrounded by tall buildings than in more open areas.
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Prairie dogs are burrowing rodents. They do not suffocate in their burrows,
because the effect of air speed on pressure creates sufficient air
circulation. The animals maintain a difference in the shapes of two
entrances to the burrow, and because of this difference, the air blows past
the openings at different speeds, as the drawing indicates. Assuming that
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Vg = 1.1 m/s
VA = 8.5 m/s
Prairie dogs are burrowing rodents. They do not suffocate in their burrows, because the effect of air speed on pressure creates sufficient air circulation. The animals maintain a difference in the shapes of two entrances to the burrow, and because of this difference, the air blows past the openings at different speeds, as the drawing indicates. Assuming that the openings are at the same vertical level, find the difference in air pressure between the openings and indicate which way the air circulates.
Prairie dogs are burrowing rodents. They do not suffocate in their burrows,
because the effect of air speed on pressure creates sufficient air
circulation. The animals maintain a difference in the shapes of two
entrances to the burrow, and because of this difference, the air blows past
the openings at different speeds, as the drawing indicates. Assuming that
the openings are at the same vertical level, find the difference in air
pressure between the openings and indicate which way the air circulates.
ve = 1.1 m/s
V. - 8.5 m/s
Chapter 13 Solutions
Applied Physics (11th Edition)
Ch. 13.1 - Find the pressure (in lb/in2) at the bottom of a...Ch. 13.1 - Find the height of a column of water where the...Ch. 13.1 - Find the density of a liquid that exerts a...Ch. 13.1 - (a) Find the total force on the bottom of a...Ch. 13.1 - What must the water pressure be to supply water to...Ch. 13.1 - A small rectangular tank 5.00 in. by 9.00 in. is...Ch. 13.1 - Find the water pressure (in kPa) at the 25.0-m...Ch. 13.1 - Find the height of a column of water where the...Ch. 13.1 - What is the height of a column of water if the...Ch. 13.1 - What is the mass density of a liquid that exerts a...
Ch. 13.1 - What is the mass density of a liquid that exerts a...Ch. 13.1 - (a) Find the total force on the bottom of a...Ch. 13.1 - What must the water pressure be to supply the...Ch. 13.1 - Find the water pressure at ground level to supply...Ch. 13.1 - What pressure must a pump supply to pump water up...Ch. 13.1 - A submarine is submerged to a depth of 3550 m in...Ch. 13.1 - A filled water tower sits on the top of the...Ch. 13.1 - A filled water tower sits on the top of the...Ch. 13.1 - A filled water tower sits on the top of the...Ch. 13.1 - A filed water tower sits on the top of the highest...Ch. 13.1 - A filed water tower sits on the top of the highest...Ch. 13.1 - A cylindrical grain bin 24.0 ft in diameter is...Ch. 13.2 - The area of the small piston in a hydraulic jack...Ch. 13.2 - The mechanical advantage of a hydraulic press is...Ch. 13.2 - Find the mechanical advantage of a hydraulic press...Ch. 13.2 - The mechanical advantage of a hydraulic press is...Ch. 13.2 - Find the mechanical advantage of a hydraulic press...Ch. 13.2 - The small piston of a hydraulic press has an area...Ch. 13.2 - The MA of a hydraulic jack is 250. What force must...Ch. 13.2 - The small piston of a hydraulic press has an area...Ch. 13.2 - The MA of a hydraulic jack is 420. Find the weight...Ch. 13.2 - The mechanical advantage of a hydraulic jack is...Ch. 13.2 - The pistons of a hydraulic press have radii of...Ch. 13.2 - The small circular piston of a hydraulic press has...Ch. 13.2 - The large piston on a hydraulic lift has radius...Ch. 13.2 - In a hydraulic system a 20.0-N force is applied to...Ch. 13.2 - If the diameter of the larger piston in Problem 14...Ch. 13.2 - If a dentists chair weighs 1600 N and is raised by...Ch. 13.2 - A hydraulic jack whose piston has a...Ch. 13.2 - Compressed air in a car lift applies a force to a...Ch. 13.2 - The small piston of an automobile lift has an area...Ch. 13.2 - If the lifting force of a hydraulic truck jack is...Ch. 13.3 - Change 815 kPa to lb/in2.Ch. 13.3 - Change 64.3 lb/in2 to kPa.Ch. 13.3 - Change 42.5 lb/in2 to kPa.Ch. 13.3 - Change 215 kPa to lb/in2.Ch. 13.3 - Find the pressure of (a) 3 atm (in kPa), (b) 2 atm...Ch. 13.3 - A barometer in the Rocky Mountains reads 516 mm of...Ch. 13.3 - Find the absolute pressure in a bicycle tire with...Ch. 13.3 - Find the absolute pressure of a motorcycle tire...Ch. 13.3 - Find the gauge pressure of a tire with an absolute...Ch. 13.3 - Find the gauge pressure of a tire with an absolute...Ch. 13.3 - Find the absolute pressure of a tire gauge that...Ch. 13.3 - Find the absolute pressure of a tank whose gauge...Ch. 13.3 - Find the gauge pressure of a tank whose absolute...Ch. 13.3 - Find the gauge pressure of a tank whose absolute...Ch. 13.3 - Find the absolute pressure of a cycle tire with...Ch. 13.3 - Find the absolute pressure in a hydraulic jack...Ch. 13.4 - A metal alloy weighs 81.0 lb in air and 68.0 lb...Ch. 13.4 - A piece of metal weighs 67.0 N in air and 62.0 N...Ch. 13.4 - A rock weighs 25.7 N in air and 21.8 N in water....Ch. 13.4 - A metal bar weighs 455 N in air and 437 N in...Ch. 13.4 - A rock displaces 1.21 ft3 of water. What is the...Ch. 13.4 - A metal displaces 16.8 m3 of water. Find the...Ch. 13.4 - A metal casting displaces 327 cm3 of water. Find...Ch. 13.4 - A piece of metal displaces 657 cm3 of water. Find...Ch. 13.4 - A metal casting displaces 2.12 ft3 of alcohol....Ch. 13.4 - A metal cylinder displaces 515 cm3 of gasoline....Ch. 13.4 - A 75.0-kg rock lies at the bottom of a pond. Its...Ch. 13.4 - A 125-lb rock lies at the bottom of a pond. Its...Ch. 13.4 - A flat-bottom river barge is 30.0 ft wide, 85.0 ft...Ch. 13.4 - A flat-bottom river barge Is 12.0 m wide, 30.0 m...Ch. 13.4 - What is the volume (in m3) of the water displaced...Ch. 13.4 - A lifeguard swims with her head just above the...Ch. 13.4 - An underwater camera weighing 1250 N in air is...Ch. 13.5 - Water flows through a hose of diameter 3.90 cm at...Ch. 13.5 - Prob. 2PCh. 13.5 - Water flows from a pipe at 650 L/min. (a) What is...Ch. 13.5 - Water flaws through a pipe of diameter 8.00 cm at...Ch. 13.5 - A pump is rated to deliver 50.0 gal/min. Find the...Ch. 13.5 - Prob. 6PCh. 13.5 - What is the diameter of a pipe in which water...Ch. 13.5 - A garden hose is used to fill a bucket in 30.0 s....Ch. 13.5 - A liquid flows through a pipe with a diameter of...Ch. 13.5 - A pipe system with a radius of 0.060 m has a...Ch. 13 - The force applied to a unit area is called a....Ch. 13 - Prob. 2RQCh. 13 - For an incompressible fluid, the flow rate is a....Ch. 13 - Bernoullis principle states that for horizontal...Ch. 13 - Bernoulli's principle explains a. curving...Ch. 13 - What is the metric unit for pressure?Ch. 13 - In your own words, define pressure.Ch. 13 - In your own words, state how to find the force...Ch. 13 - In your own words, state the hydraulic principle.Ch. 13 - Describe why a ship floats.Ch. 13 - Describe how a rotating baseball follows a curved...Ch. 13 - How does an airplane wing provide lift?Ch. 13 - What is the difference between streamline and...Ch. 13 - Give an example of how Archimedes principle...Ch. 13 - Prob. 15RQCh. 13 - Is the pressure on a small piston different from...Ch. 13 - On what does the total force exerted by a liquid...Ch. 13 - Why must the thickness of a dam be greater at the...Ch. 13 - Is the hydraulic piston in the master brake...Ch. 13 - Prob. 20RQCh. 13 - Find the pressure (in kPa) at the bottom of a...Ch. 13 - Find the depth in a lake at which the pressure is...Ch. 13 - Find the height of a water column when the...Ch. 13 - What is the total force exerted on the bottom of a...Ch. 13 - Find the water pressure (in kPa) at a point 35.0 m...Ch. 13 - Find the total force on the bottom of a...Ch. 13 - Find the total force on the side of a cylindrical...Ch. 13 - Find the total force on the side of a rectangular...Ch. 13 - What must the water pressure (in kPa) be on the...Ch. 13 - What water pressure must a pump that is located on...Ch. 13 - A submarine is submerged to a depth of 3150 ft in...Ch. 13 - The area of the large piston in a hydraulic jack...Ch. 13 - The MA of a hydraulic jack is 324. What force must...Ch. 13 - The pistons of a hydraulic press have radii of...Ch. 13 - Find the absolute pressure in a bicycle tire with...Ch. 13 - Find the gauge pressure of a tire with an absolute...Ch. 13 - Find the gauge pressure of a tank whose absolute...Ch. 13 - A rock weighs 55.4 N in air and 52.1 N in water....Ch. 13 - A metal displaces 643 cm3 of water. Find the...Ch. 13 - A rock displaces 314 cm3 of alcohol. Find the...Ch. 13 - A flat-bottom barge is 22.3 ft wide, 87.5 ft long,...Ch. 13 - Water flows through a hose of diameter 3.00 cm at...Ch. 13 - Water flows through a 13.0-cm-diameter fire hose...Ch. 13 - An aquariums main tank holds 200,000 gal or 758 m3...Ch. 13 - The piston in a master cylinder has a radius of...Ch. 13 - A crane that can lift a maximum of 9000 N is...Ch. 13 - Wind tunnels are used to measure the aerodynamic...Ch. 13 - A flexible hose with inside radius 0.250 in. leads...
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