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A bracket with pulleys for positioning magnetic tape in an electronic data storage device is shown. The pulleys are frictionless, the tape supports a force T = 2 N, and the thickness of the tape can be neglected.
(a) Use the two tape forces in Fig. P4.48(a) to compute the resultant couple moment.
(b) Replace the forces on the two pulleys with point forces on the pinions as shown in Fig. P4.48(b), and compute the resultant couple moment (replacement of pulley forces by bearing forces is discussed in Chapter 3 in connection with Fig. 3.9).
If the district heating system should supply hot water at 900C, what is the lowest possible condenser pressure with water as the working sub-stance?
For reaction-controlled growth, are there any differences between the solute distribution in the LSW theory and those in dissolution-controlled growth and precipitation-controlled growth? Explain.
One-tenth kmol of carbon monoxide (CO) in a piston- cylinder assembly undergoes a process from p1 5 150 kPa, T1 5 300 K to p2 5 500 kPa, T2 5 370 K. For the process, W 5 2300 kJ. Employing the ideal gas model, determine
Illustrate six typical application of primary cells and illustrate six typical applications of secondary cells.
natural gas is a mixture of methane ethane propane and butane as well as other components . comsider natural gas
The double-acting piston cylinder shown below consists of two chambers separated by a frictionless piston. The piston is initially locked in place, dividing the device into two equal 1 m3 sub-chambers. Side A contains water at 90°C and a quality of x..
a system consisting of 3 lb of water vapor in a piston- cylinder assembly initially at 350degf and a volume of 71.7 ft3
air enters an evaporative cooler at 1 atmosphere 36degc and 20 percent relative humidity at a rate of 4 m3min and it
where k is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate?
The temperature in a pressure cooker during cooking at sea level is measured to be 250 F. Determine the absolute pressure inside the cooker in psia and in atm. Would you modify your answer if the place were at a higher elevation?
Polymer fracture is highly dependent on the testing conditions, such as temperature and strain rate, but is not affected by the nature of bonding of the molecular chains. For metals, fracture only occurs along the boundaries created by the differentl..
Water is stored in a water tower at an elevation of 1804 m above sea level. The foundation of your apartment building is at an elevation of 437 m above sea level and you live on the 9th floor, with each floor having a height of 3.3 m.
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