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A weather balloon is constructed of a flexible material such that the internal pressure of the balloon is always 10 kPa higher than the local atmospheric pressure. At sea level the diameter of the balloon is 1 m, and it is filled with helium. The balloon material, structure, and instruments have a mass of 100 g. This does not include the mass of the helium. As the balloon rises, it will expand. The temperature of the helium is always equal to the local atmospheric temperature, so it decreases as the balloon gains altitude. Calculate the maximum altitude of the balloon in a standard atmosphere.
a counter shell and tube exchanger is used to heat water with hot exhaust gases.the water c4180 jkg cflows at a rate 2
an injected slug of tracer material flows with its carrier fluid down a long straight pipe in dispersed plug flow. at
a downward force of 98 n acts on the free end of the illustrated pulley. ma 47 kg what is block as acceleration?
Air undergoes an isentropic process from P_1 = 100 kPA and T_1 = 300 K to a final state where the temperature is 700 K. Assuming an ideal gas, find P_2 in kPa using both the ideal gas tables and assuming a constant specific heat ratio at the average ..
consider a supersonic wind tunnel with test section mach number of 2 and fixed geometry diffuser designed to operate
the net contents in ounces of canned soup is a random varialbe with probability distribution fx 4x-11.75 11.75 lt x lt
a system consists of liquid water in equilibrium with a gaseous mixture of air and water vapor. how many phases are
permit a user to input a number between 1 to 10. store this value as the variable numberofresistors. this will be used
a well-insulated rigid tank contains 2 kg of a saturated liquid-vapor mixture of water at 100 kpa. initially
a strip of metal is 250 mm long. it is stretched in two steps first to 300 mm and then nbspto 400 mm. show that the
A metal specimen with an original diameter of 0.45 in. and a gage length of 2.75 in. is tested in tension until fracture occurs. At the point of fracture, the diameter of the specimen is 0.21 in. and the fractured gage length is 3.71 in. Calculate th..
water is pump from a lake to a storage tank at 18m above at a rate of 70 L/s while consuming 20.4 kW of electric power. disregarding any frictional losses in the pipes and any change s in kinetic energy, determine (a) the overall efficiency of the..
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