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A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa. Heat transfer continues until the total volume increases by 20 percent. Determine (a) the initial and final temperatures, (b) the mass of liquid water when the piston first starts moving, and (c) the work done during this process. Also, show the process on a P-v diagram.
Crates A and B weigh 300 lb and 110 lb, respectively. They are connected together with a cable and placed on the inclined plane. If the angle θ is gradually increased, determine when the crates begin to slide.
A rectangle channel 20 feet wide carries a discharge Q= 200cfs. Compute the critical depth and critical velocity for the flow in the channel.
if the rolling resistance is 1/100 of the weight of the car, determine the compression of each spring when the car is momentarily brought to rest spring 1 500kN/m spring 2 300kN/m and distance between springs and car 30m
An SAE steel wire (1mm diameter) is coated with another cover to form a composite material with diameter of 2 mm. a) determine the elastic modulus of the composite material;
Consider a singly reinforced concrete beam with a base dimension of b= 12in and d=20in. Assume all bars are located in one row. Use Grade 60 steel and 5ksi concrete. Find the nominal flexural strength and the design strength for the following cases
A 1.6-m wide rectangular channel carries 1.8 m3/s at a depth of 0.85 m. The channel undergoes a smooth transition in which the channel bottom rises 15 cm and contracts to a width of 1.3 m. Assuming friction losses are negligible, determine the dep..
A company manufactures a brand of light bulbs with a lifetime in month that is normally distribute with a mean=3 and a variance=1. A consumer buys a number of these bulbs with the intention of replacing them successively as they burn out.
Design a rectangular channel contraction from width b1 (upstream) to width b2 (downstream). Assume uniform flow approaches the contraction (i.e. normal depth approaching the channel contraction).
A third similar bar is placed on the other two in the groove between them. Neglecting friction, what horizontal force on each lower bar is necessary to keep them together.
The position of a car traveling between two stop signs along a straight city block is given by r=[9t-(43/2)sin(2t/5)]m, where t denotes time and 0s
The man has a mass of 75 kg, and the beam has a mass of 40 kg. The beam is in equilibrium with the man standing at the end and pulling on the cable. Determine the force exerted on the cable by the man and the reactions at pinned support C.
A drinking water system treats a flow of 3000 gallons per minute. Consider disinfection of a bacteria by ozone with an inactivation constant of K=0.06/min. To reduce the number of bacteria from 400 bact/ml to 4 bact/ml.
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