FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119803645
Author: Sonntag
Publisher: WILEY
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Textbook Question
Chapter 1, Problem 1.75EP
The piston cylinder in Fig. P1.29 has a diameter of 4 in., inside pressure
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Q1: Determine the length, angle of contact, and width of a 9.75 mm thick
leather belt required to transmit 15 kW from a motor running at 900 r.p.m. The
diameter of the driving pulley of the motor is 300 mm. The driven pulley runs at
300 r.p.m. and the distance between the centers of two pulleys is 3 meters. The
density of the leather is 1000 kg/m³. The maximum allowable stress in the
leather is 2.5 MPa. The coefficient of friction between the leather and pulley is
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5. A 15 kW and 1200 r.p.m. motor drives a compressor at 300 r.p.m. through a pair of spur gears having
20° stub teeth. The centre to centre distance between the shafts is 400 mm. The motor pinion is made
of forged steel having an allowable static stress as 210 MPa, while the gear is made of cast steel
having allowable static stress as 140 MPa. Assuming that the drive operates 8 to 10 hours per day
under light shock conditions, find from the standpoint of strength,
1. Module; 2. Face width and 3. Number of teeth and pitch circle diameter of each gear.
Check the gears thus designed from the consideration of wear. The surface endurance limit may be
taken as 700 MPa. [Ans. m = 6 mm; b= 60 mm; Tp=24; T=96; Dp = 144mm; DG = 576 mm]
4.
G
A micarta pinion rotating at 1200 r.p.m. is to transmit 1 kW to a cast iron gear at a speed of 192 r.p.m.
Assuming a starting overload of 20% and using 20° full depth involute teeth, determine the module,
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Chapter 1 Solutions
FUNDAMENTALS OF THERMODYNAMICS
Ch. 1 - Separate the list P,F,V,,T,a,m,L,t, and V into...Ch. 1 - A tray of liquid water is placed in a freezer...Ch. 1 - The overall density of fibers, rock wool...Ch. 1 - Is density a unique measure of mass distribution...Ch. 1 - Water in nature exists in three different phases:...Ch. 1 - What is the approximate mass of 1 L of gasoline?...Ch. 1 - Can you carry 1m3 of liquid water?Ch. 1 - A heavy refrigerator has four height-adjustable...Ch. 1 - A swimming pool has an evenly distributed pressure...Ch. 1 - If something floats in water, what does it say...
Ch. 1 - Two divers swim at a depth of 20 m. One of them...Ch. 1 - An operating room has a positive gage pressure,...Ch. 1 - A water skier does not sink too far down in the...Ch. 1 - What is the lowest temperature in degrees Celsius?...Ch. 1 - How cold can it be on Earth and in empty space?Ch. 1 - A thermometer that indicates the temperature with...Ch. 1 - How can you illustrate the binding energy between...Ch. 1 - One kilopond (1 kp) is the weight of 1 kg in the...Ch. 1 - A stainless steel storage tank contains 5kg of...Ch. 1 - A steel cylinder of mass 4kg contains 4L of water...Ch. 1 - The Rover Explorer has a mass of 185Kg , how much...Ch. 1 - A 1700kg car moving at 80km/h is decelerated at a...Ch. 1 - The elevator in a hotel has a mass of 750kg , and...Ch. 1 - One of the people in the previous problem weighs...Ch. 1 - A 1m3 container is filled with 400kg of granite...Ch. 1 - A power plant that separates carbon dioxide from...Ch. 1 - A 5m3 container is filled with 900kg of granite...Ch. 1 - A 5000kg elephant has a cross-sectional area of...Ch. 1 - A valve in the cylinder shown in Fig. P1.29 has a...Ch. 1 - The piston cylinder in Fig. P1.29 has a diameter...Ch. 1 - A hydraulic lift has a maximum fluid pressure of...Ch. 1 - Ahydraulic cylinder has a 125mm diameter piston...Ch. 1 - A 75kg human total footprint is 0.05m2 when the...Ch. 1 - A piston/cylinder with a cross-sectional area of...Ch. 1 - A 2.5m -tall steel cylinder has a cross-sectional...Ch. 1 - An underwater buoy is anchored at the seabed with...Ch. 1 - A floating oil rig is anchored in the seabed with...Ch. 1 - At the beach, atmospheric pressure is 1025 mbar....Ch. 1 - A steel tank of cross-sectional area 3m2 and...Ch. 1 - A piston mp=5kg , is fitted in a cylinder. A=15cm2...Ch. 1 - A container ship is 240m long and 22m wide. Assume...Ch. 1 - A probe is lowered 16m into a lake. Find the...Ch. 1 - A person, 75kg , wants to fly (hoover) on a 2kg...Ch. 1 - The density of atmospheric air is about 1.15kg/m3...Ch. 1 - A barometer to measure absolute pressure shows a...Ch. 1 - A differential pressure gauge mounted on a vessel...Ch. 1 - What pressure difference a 100-m column of...Ch. 1 - A barometer measures 760mmHg at street level and...Ch. 1 - An exploration submarine should be able to descend...Ch. 1 - The absolute pressure in a tank is 115kPa and the...Ch. 1 - An absolute pressure gauge attached to a steel...Ch. 1 - A pipe flowing light oil has a manometer attached,...Ch. 1 - The difference in height between the columns of a...Ch. 1 - A piece of experimental apparatus. Fig. P1.54. is...Ch. 1 - A 0.2m3 piece of softwood is lifted upto the top...Ch. 1 - A car of mass 1775kg travels with a velocity of...Ch. 1 - What is temperature of 5C in degrees Kelvin?Ch. 1 - A mercury thermometer measures temperature by...Ch. 1 - The density of liquid water is =1008T/2(kg/m3)...Ch. 1 - Repeat Problem 1.54 if the flow inside the...Ch. 1 - Adam retains a lake 6m deep, as shown in Fig, P...Ch. 1 - In the city water tower, water is pumped up to a...Ch. 1 - The main waterline into a tall building has a...Ch. 1 - A mass of 2lbm has an acceleration of 5ft/s2 ....Ch. 1 - How much mass is in 1 gal of gasoline? In helium...Ch. 1 - Can you easily carry a 16m bar of solid gold?Ch. 1 - What is the temperature of 5F in degrees Rankine?Ch. 1 - What is the lowest possible temperature in degrees...Ch. 1 - What is the relative magnitude of degree Rankine...Ch. 1 - The Rover Explorer has a mass of 410Ibm , how much...Ch. 1 - A 2500Ibm car moving at 25mi/h is accelerated at a...Ch. 1 - An escalator brines four people with a total mass...Ch. 1 - A car of mass 4000Ibm travels with a velocity of...Ch. 1 - A power plant that separates carbon dioxide from...Ch. 1 - The piston cylinder in Fig. P1.29 has a diameter...Ch. 1 - A laboratory room keeps a vacuum of oil 1in. of...Ch. 1 - A person, 175Ibm , wants to fly (hoover) on a 4lbm...Ch. 1 - A floating oil rig is anchored in the seabed with...Ch. 1 - A container ship is 790ft long and 72ft wide....Ch. 1 - A manometer shows a pressure difference of 3.5in....Ch. 1 - What pressure difference does a 300-ft column of...Ch. 1 - A piston cylinder with a cross-sectional area of...Ch. 1 - The main waterline into a tall building has a...Ch. 1 - A piston, mp=10lbm , is fitted in a cylinder,...Ch. 1 - The human comfort zone is between 18 and 24C ....
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