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A helium balloon lifts a basket and cargo of total weight 2000 N under standard conditions, in which the density of air is 1.29 kg/m3 and the density of helium is 0.178 kg/m3. What is the minimum volume of the balloon?
Calculate velocities of the locomotive and the tanker after the collision in terms of e (0
Water at 20 C flows across a flat plate at a velocity of 0.25 m/s. compute the distance from the plate’s leading edge to where the laminar boundary layer thickness is 3 cm. Verfiy that the flow is indeed lamiar at this distance.
a heat exchanger is a device in which heat flows between two fluid streams brought into thermal contact through a
A frictionless piston cylinder device arrangement initially contains 8kg of saturated water mixture at 200 Degrees Celsius. Heat is supplied to the mixture till all the mixture is converted to saturated vapour at constant pressure. Determine the fina..
consider a hollow steel sphere of inside radius r110 cm and outside radius of r220 cm. the thermal conductivity of the
Water enters the pump of a steam power plant as saturated liquit at 20kpa at a rate of 45kg/s and exits at 6mpa. Neglecting KE and PE changes and assuming the process is reversible, determine the power input of the pump
Determine the stress that would result in a 1in schedule 40 steel pipe if a plumber applies a force of 70lb at the end of a wrench handle that is 16in long. What is the equation for torque? What is the value of T in this problem? Include units. What ..
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
engineers plan to build a pipeline 1000 km in length to transport water to a drought-stricken region. they wish to have
water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the
Assuming that the coefficient of friction in cutting is 0.25 for turning a hard aluminium alloy on a 20 hp lathe (mechanical efficiency = 90%) with a width of cut of 0.24 in, a rake angle of 11°, and a cutting speed of 333 ft/min. Assume the cut is a..
what would be the formula to find out weld pressure adjustments when atm inside the tube is changed?
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