Ther.odynamics 1. A 120-lbm astronaut took his bathroom scale (a spring scale and a beam scale (comparesmasses) to the moon where the local gravity is g = 1.92 m/s². Determine how much he willweigh (a) on the spring scale and (b) on the beam scale. Answer: (a) 23.48 lbf2. The temperature of ambient air in a certain location is measured to be - 55°C. Express thistemperature in Fahrenheit (°F), Kelvin (K), and Rankine (R) units,3. The temperature of a system drops by 30°F during a cooling process. Express this drop intemperature in K, R, and °C.4. A vacuum gage connected to a chamber reads 0.26 bar at a location where the atmosphericpressure is 95 kPa. Determine the absolute pressure (in psi units) in the chamber. Answer: 10psi5. The pressure in a compressed air storage tank is 155 psi. What is the tank's pressure in (a)kN/m?; (b) bar; and (c) ksi?6. A gas is contained in a vertical, frictionless piston- cylinder device. The piston has a mass of2.10 kg and a cross sectional area of 6 in?. A compressed spring above the piston exerts aforce of 27 lbf on the piston. If the atmospheric pressure is 98 kPa, determine the pressureinside the cylinder. Draw the schematic diagram. Answer: 134.34 kPa7. What is the weight of a 1-kg substance inа. Nb. kN,c. kgfd. Ibf8. A closed vessel having a volume of 1.6 liters holds 3.4 x 1022 molecules of methanol vapor.For the methanol, determine (a) the amount present, in kg and kmol, and (b) the specificvolume, in m/kg and m/kmol. Answer: m = 0.00181 kg , v = 0.55 m²/kg9. The pressure from water mains located at street level may be insufficient for delivering waterto the upper floors of tall buildings. In such a case, water may be pumped up to a tank thatfeeds water to the building by gravity. For an open storage tank atop a 300-ft-tall building,determine the pressure, in lbf/in., at the bottom of the tank when filled to a depth of 20 ft.The density of water is 62.2 lb/ft, g = 32.0 ft/s, and the local atmospheric pressure is 14.7lbf/in.?. Answer: P = 23.29 lbf/in.

1. A 120-lbm astronaut took his bathroom scale (a spring scale and a beam scale (compares masses)) to the moon where the local gravity is g = 1.92 m/s². Determine how much he will weigh (a) on the spring scale and (b) on the beam scale. Answer: (a) 23.48 lbf

1. A 120-lbm astronaut took his bathroom scale (a spring scale and a beam scale (compares masses)) to the moon where the local gravity is g = 1.92 m/s². Determine how much he will weigh (a) on the spring scale and (b) on the beam scale. Answer: (a) 23.48 lbf

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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Janice is grilling a steak for her July 4th barbecue dinner. The steak initially weighs 300 grams and is 25 mm thick. After grilling it for a while, she considers the steak done, and measures it again: it now weighs 215 grams, and is 15 mm thick. For both the cooked and uncooked steak, she uses the thumb-test to determine the done-ness, i.e. she uses her thumb (area ~5cm2) to push down with a force of 5 N. The uncooked steak compresses by 7 mm, and the cooked steak by 2 mm. The change in elasticity of the steak on cooking is due partly to the loss of water volume (so that existing bonds get closer together) and partly to the creation of new bonds. Assume all of the difference in raw vs. cooked steak thickness is due to water loss that makes it thinner (25 mm thick in the uncooked steak, versus 15 mm thick in the cooked steak), and that the other dimensions of the steak (length and width) have not changed. By what percentage has the steak's volume decreased from the original value?…
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Janice is grilling a steak for her July 4th barbecue dinner. The steak initially weighs 300 grams and is 25 mm thick. After grilling it for a while, she considers the steak done, and measures it again: it now weighs 215 grams, and is 15 mm thick. For both the cooked and uncooked steak, she uses the thumb-test to determine the done-ness, i.e. she uses her thumb (area ~5cm2) to push down with a force of 5 N. The uncooked steak compresses by 7 mm, and the cooked steak by 2 mm. Calculating elasticity What is the elasticity of the raw steak? Express your answer in Pascals but without including the units in your answer. What is the elasticity of the cooked steak? Express your answer in Pascals, but without including the units.
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