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Answer to Problem 50QAP
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Answer to Problem 50QAP
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Chapter 11 Solutions
COLLEGE PHYSICS
- How many cubic meters of helium are required to lift a balloon with a 400-kg payload to a height of 8 000 m? Take He = 0.179 kg/m3. Assume the balloon maintains a constant volume and the density of air decreases with the altitude z according to the expression air = 0ez/8, where z is in meters and 0 = 1.20 kg/m3 is the density of air at sea level.arrow_forwardVerigy that the SI of hpg is N/m2.arrow_forwardHow many cubic meters of helium are required to lift a light balloon with a 400-kg payload to a height of 8 000 m? Take Hc = 0.179 kg/m3. Assume the balloon maintains a constant volume and the density of air decreases with the altitude z according to the expression pair = 0e-z/8 000, where z is in meters and 0 = 1.20 kg/m3 is the density of air at sea level.arrow_forward
- The pressure in a compressed air storage tank is 1200 kPa. What is the tank’s pressure in (a) kN and m units; (b) kg, m, and s units; and (c) kg, km, and s units?arrow_forwardA balloon contains 6 L of He. The pressure is reduced to 1 atm and the balloon expands to occupy a volume of 12.25 L, T constant. What was the initial pressure exerted on the balloon? (Give your answer correct to two decimal places) The pressure is atmarrow_forwardWhat is the pressure of the gas in the cylinder, in kPa (kiloPascal)? Pmercury = 13,600 kg/m3, 1.0 atm = 1.00 x 105 Pa = 100 kPa, and g = 10.0 m/s?. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. Pgas -Mercury 16 cm 6 cmarrow_forward
- An airplane passenger has a volume V1 of air in his stomach just before the plane takes off from a sea-level airport. What volume will this quantity of air have at cruising altitude at the same temprerature ( body temp. ), in terms of V1, the pressure on the ground P1, and the cabin pressure at cruising altitude P2? What is this volume, in cubic centimeters, if the initial volume is 110 cm^3 and the cabin pressure drops to 7.5x10^4 Pa when the plane is at cruising altitude?arrow_forwardSystemic blood pressure is expressed as the ratio of the systolic pressure (when the heart first ejects blood into the arteries{max}) to the diastolic pressure (when the heart is relaxed{min}). Systemic pressure = Systolic pressure / diastolic pressure. Both pressures are measured at the level of the heart and are expressed in millimeters of mercury although the units are not written. Normal systemic blood pressure is 120/80. What are the maximum and minimum forces (in Newtons) that the blood exerts against each square centimeter of the heart for a person with high blood pressure, 145 / 85 ? Note: this is a conversion question...follow the units. Answer to 2 sig figs. (1.013 x 10^5 N/m^2 = 760 mmHg =1 atm) (1m = 100 cm) maximum force = {Systolic} minimum force = {Diastolicarrow_forwardSystemic blood pressure is expressed as the ratio of the systolic pressure (when the heart first ejects blood into the arteries{max}) to the diastolic pressure (when the heart is relaxed{min}). Systemic pressure = Systolic pressure / diastolic pressure. Both pressures are measured at the level of the heart and are expressed in millimeters of mercury although the units are not written. Normal systemic blood pressure is 120/80. What are the maximum and minimum forces (in Newtons) that the blood exerts against each square centimeter of the heart for a person with high blood pressure, 145 / 85 ? Note: this is a conversion question...follow the units. Answer to 2 sig figs. (1.013 x 10^5 N/m^2 = 760 mmHg =1 atm) (1m = 100 cm)arrow_forward
- Set up the problem P1V1=P1V1 v1=V1 (P1/P1) V1= 11.0 L(98.0 kPa/86.2 kPo) enallenge : A weather balloon has a volume of 90.0 L when it is released from sea level. What is the atmospheric pressure on the balloon when it has grown to a size 175.0 L? Identify the unknown : pression: P Initial volume: v1 = 90.0 L Final volume: v2 = 175.0 L Send a chatarrow_forwardThe density of air under ordinary conditions at 25 °C is 1.19 g/L. How many kilograms of air are in a room that measures 13.0 ft x 12.0 ft and has a 9.0 ft celing?arrow_forwardThe basic function of an automobile's carburetor is to atomize the gasoline and mix it with air to promote rapid combustion. Assume that 40 cm? of gasoline is atomized into N spherical droplets. Each droplet has a radius of 2.0 x 10-5 m. Find the total surface area of these N spherical droplets.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningUniversity Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University