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The drinking water needs of an office are met by large water bottles. One end of a 0.6 cm diameter plastic hose is inserted into the bottle placed on a high stand, while the other end with on/off valve is maintained 0.6 m below the bottom of the bottle. If the water level in the bottle is 0.45 m when it is full, determine how long it will take at the minimum to fill a 0.25 L glass (a) when the bottle is first opened and (b) when the bottle is almost empty. Neglect frictional losses.
a popular method of cooling homes in the southwest us is the evaporative cooler. it cools air entering a home by
one kilogram of water at 300degc expands against a piston in a cylinder until it reaches ambient pressure 100 kpa at
An inventor claims to have developed a refrigeration unit with a COP of 8.5 which maintains the refrigerated space at -10oC while operating in a room where the temperature is 25oC. Can this claim be correct?
A 0.3-L glass of water at 20°C is to be cooled with ice to 5°C. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0°C and 333.7 kJ/kg, respectively, and the density of water is 1 kg/L.
a 6 lb collar is constrained to travel along a frictionless vertical ring of r3 ft. the spring is attached to the
a block weighing 10 lbf and having dimensions 10 in. on each edge is pulled up an inclined surface on which there is a
A vehicle of mass 1500kg and track 1.8m has a centre of mass located centrally at 1,1m above the ground. It has to travel around a bend of 56m radius to the centre of mass.
propane vapor enters the valve at 1.5 mpa 70 c and leaves at 0.5 mpa. if the propane undergoes a throttling process
A 1 m diameter cylindrical container with hemispherical ends is used to transport gas. The internal pressure is 5 MPa and the safety factor is 2. Using the MSST determine the container thickness. The Material is such that E = 200 GPa, Sy = 430 MPa an..
a hollow steel shaft 6 ft long has an outer diameter of 2.5 in. and an inner diameter of 1.5 in. the shaft is
water at a a flow rate of m 0.215 kgs is cooled from 70 degrees celsius to 30 degrees celsius by passing it through a
find the following equivalent amounts if the interest rate is 8 compounded annually.a the present value of series of
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