*69. ssm A Venturi meter is a device that is used for measuring the speedof a fluid within a pipe. The drawing shows a gas flowing at speed v,through a horizontal section of pipe whose cross-sectional area is Az =0.0700 m². The gas has a density of p = 1.30 kg/m². The Venturi meterhas a cross-sectional area of A, = 0.0500 m² and has been substitutedfor a section of the larger pipe. The pressure difference between the twosections is P, – P, = 120 Pa. Find (a) the speed v, of the gas in the larger,original pipe and (b) the volume flow rate Q of the gas.HiLoP1A2 v2A2 v2A1Venturi meter

Given data: The cross sectional area of the horizontal pipe is A2=0.0700 m2. The density of the gas…

Answered: *69. ssm A Venturi meter is a device…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3 a. What is the density of air inside the balloon, in terms of the pressure P, temperature T, molar mass M, and the gas constant R? b. How much mass can this balloon lift (in addition to the mass of the gas inside) in terms the balloon volume Vb, the atmosphere air density ρa, the density of the air in the balloon ρg, and the gravitational acceleration g? c. If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.
A sphygmomanometer is a device used to measure blood pressure, typically consisting of an inflatable cuff and a manometer used to measure air pressure in the cuff. In a mercury sphygmomanometer, blood pressure is related to the difference in helghts between two columns of mercury. The mercury sphygmomanometer shown in the figure below contains air at the cuff pressure P. Po The difference in mercury heights between the left tube and the right tube is h= 109 mmtg - 0.109 m, a normal systolic reading. What is the gauge systolic blood pressure Poauge in pascals? The density of mercury is p 13.6 x 10 kg/m and the ambient pressure is Po1.01 x 10 Pa. HINT Pa
A PROBLEMS 6.63, 6.64 6.64 This "double" nozzle discharges water (at 10°C) into the atmosphere at a rate of 0.50 m /s. If the nozzle is lying in a horizontal plane, what x-component of force acting through the flange bolts is required to hold the nozzle in place? Note: As- sume irrotational flow, and assume the water speed in each jet to be the same. Jet A is 10 cm in diameter, jet B is 12 cm in diame- ter, and the pipe is 30 cm in diameter.
A fish maintains its depth in fresh water by adjusting the air content of porous bone or air sacs to make its average density the same as that of the water. Suppose that with its air sacs collapsed, a fish has a density of 1.11 g/cm³. To what fraction of its expanded body volume must the fish inflate the air sacs to reduce its density to that of water? Number Units No units M
A basketball is pressurized to a gauge pressure of PG = 55 kPa when at the surface of a swimming pool. (Patm = 101 kPa). The ball is then submerged in the pool of water which has a density ρ = 1000 kg/m3. Assume the ball does not change in mass, temperature, or volume as it is submerged. Calculate the absolute pressure inside the basketball in kPa when it is at the surface. Write an equation for the pressure difference ΔP between the inside and outside of the ball when it is submerged a distance y below the surface of the water. Solve the pressure equation for the depth (in meters) at which the pressure difference between the inside and outside of the ball will become zero. At this depth the pressure inside the basketball is the same as the pressure outside the ball.
A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 68° with the normal to the wall. Each molecule in the beam has a speed of 2.9 km/s and a mass of 3.3 x 10-24 g. The beam strikes the wall over an area of 8.7 cm2, at the rate of 1023molecules per second. What is the beam's pressure on the wall?
19. The radius of the bronchial tube is decreased by a factor of 4. The velocity of gas through it initially is 1 m/s. What is the velocity in the section of bronchial tube with decreased radius in m/s?
a)What volume of air at atmospheric pressure is required to fill a 14 L diving air tank at a pressure of 1.45x10^7 N/m²? b) if sea level consumes 13.5 L of air per minute, how long will the air contained in the above tank last? c) How long will the air contained in this tank last at a depth of 10 m where the pressure has increased by 1 atm? Suppose consumption is the same as at sea level. "
A gas is confined in a cylinder with a diameter of 0.47 m by a piston, on which a counterweight rests. Together, the piston and the counterweight have a mass of 150 kg. The local gravitational acceleration is 9.813 m/s^2, and the atmospheric pressure is 101.57 kPa. a. What is the force in newtons exerted on the gas by the atmosphere, piston, and counterweight, assuming there is no friction between the piston and the cylinder? Answer: F = 1.91 x 10^4 N. b. What is the gas pressure in kPa? Answer: Pabs = 110.054 kPa. c. If the gas in the cylinder is heated, it expands, pushing the piston and counterweight upward. If the piston and counterweight are lifted by 0.83 m, what is the work done by the gas in kJ? What is the change in potential energy of the piston and counterweight? Answer: w = 15.848 kJ, and ΔEp = 1.222 kJ.
A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m?. The density of air is 1.3 kg/m. 12. What is the average density of the balloon? A) 0.2 kg/m3 B) 0.4 kg/m3 C) 0.8 kg/m D) 1.0 kg/m E) 1.2 kg/m3 13. Will the balloon rise, fall, or remain stationary, and why? A) The balloon will fall because its density is greater than that of air. B) The balloon will remain stationary because its density is less than that of air. c) The balloon will rise because the upward buoyant force is greater than its weight. D) The balloon will fall because the upward buoyant force is less than its weight. E) The balloon will fall because the downward buoyant force is greater than the upward buoyant force.
b. After leaving a vehicle in an indoor car park for a night, you check the tyres' statistics from the dashboard and gotten the value as follows: Temperature of the air: 24°C Volume of air: 0.0165 m³ Absolute pressure of the tyre: 3.01 atm Current atmospheric pressure: 1.02 atm To confirm the value, you measure the pressure of the tyre with a gauge pressure and got the value of 1.99 atm. You then drive the car up to Genting Highland where the atmospheric pressure is 0.947 atm due to higher altitude. Once you have reached the destination, the temperature of the air in the tires has now risen to 42.0°C and the volume has risen to 0.0172 m. Assume ideal gas in the tyre, calculate the gauge pressure at Genting Highland. [CLO2-PLO2e
Question 23 A gas is contained in a vertical, frictionless piston- cylinder device. The piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. A compressed spring above the piston exerts a force of 150 N on the piston. If the atmospheric pressure is 95 kPa, determine the absolute pressure inside the cylinder in kPa.

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