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A shaft consisting of a steel tube of 50 mm outer diameter needs to transmit 100 kW of power while rotating at a frequency of 20 Hz.
A 150-lbm astronaut took his bathroom scale (aspring scale) and a beam scale (compares masses) to themoon where the local gravity is g 5.48 ft/s2. Determine how much he will weigh (a) on the spring
An office worker claims that a cup of cold coffee on his table warmed up to 80°C by picking up energy from the surrounding air, which is at 25°C. Is there any truth to his claim? Does this p
The lowest temperature that has been achieved is about 1 × 10-6 K. To achieve this an additional stage of cooling is required beyond that described in the previous problem, namely nuclear cool
An escalator brings four people of total 300 kg, 25 m up in a building. Explain what happens with respect to energy transfer and stored energy.
When the pendulum oscillates the amplitude of the first cycle is 6 gradians and the amplitude of the fourth cycle is 0.75 gradians. Calculate the following Logarithmic decrement.
Determine the intersection point(s) of the following pairs of curves. Follow the following steps for each problem Use fplot to plot the two curves in one figure window. Here you can see the intersecti
Per the linked problem: I don't understand how the shear calculation is done. Why is Vf and Vb 333.33 lb.ft? I understand how to get the Rb value and somewhat why it is equal to Vb, but why does thi
If the machine is mounted on a large concrete block of mass 1136kg and the stiffness of the springs or pads under the block is increased so that the statical deflection is still 0.508cm, what will b
Horizontal motion of the piston rod of the hydraulic cylinder in Figure 7 controls the rotation of link OB about O. For the instant represented, vA = 2m/s and OB is horizontal. Determine the angula
Calculate the work for the first process and the heat transfer for the second process, each in kJ per kg of air. Solve the problem each of two ways Using data from Table.
As per the linked question: How do you determine the location of the resultant? Why is located 2/3 deep and how do you get that number?
Among ten randomly selected customers who want this type of racket, what is the probability that at least six want the oversize version?
Two Carnot heat engines are operating in series such that the heat sink of the first engine serves as the heat source of the second one.
What is the probability that more than eleven loads occur during a 4-year period? (Round your answer to three decimal places.)
The remaining liquid is sent to a distillation column known as a "beer column," which concentrates the alcohol to about 40 mol% ethanol and 60mol% water in the distillate.
In an industrial plant, liquid is to be pumped from a storage tank through a system of pipes, fittings and instruments to an industrial process. If you were a design engineer on this project, what f
Water flows vertically upward through a 10-m-long cylindrical pipe and then through a 10-m-long nozzle connected to it. This straight pipe and nozzle section is connected to the remainder of the pip
The changes in the kinetic and potential energies are negligible. Find the rate of cooling the air conditioner must provide and the required mass flow rate of the R134a.
A 9 meter diameter balloon filled with helium carries a 100 kg person.The force that will push the balloon up is F =p air v ballon.What is the acceleration of the ballon when it is first realeased?
A piston-cylinder device contains R-134a. Initially the phase is saturated vapor at 160 kPa. The system then undergoes the following cycle. Determine the heat and work associated with each process.
On May 23, 1998, a tanker truck loaded with gasoline (p=719.7 kg/m^3) jumped a jersey barrier and collided with an oncoming pickup truck. The resulting fireball and blaze melted structural supports
Show that he is wrong by calculating the ratio of times required to achieve the same results at these two temperatures. Assume the iron in question is FCC.