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Relative speed*
An observer sees two spaceships flying apart with speed 0.99c. What is the speed of one spaceship as viewed by the other?
Carbon dioxide (CO2) gas undergoes a process in a closed system from T1=100 F, p1=20 lbf/in^2 to T2=400 R,p2=50 lbf/in^2. The entropy produced due to internal irreversibilities during the process is determined to be 0.15 Btu/R per lb of gas.
Compute the fugacities of ethane and n-butane in an equimolar mixture at 373.15K at 1, 10, and 15 bar total pressure assuming that the Lewis-Randall rule is correct.
a particle travels around a circular path having a radius of 50 m. if it is initially traveling with a speed of 10 m s
consider a counter-flow heat exchanger in a refrigeration system. saturated liquid-vapor mixture of r-22 enters the
What dimensions would you use for a booth-type hood if you wanted an exhaust rate of 1,000 cubic feet per minute and a capture rate of 100 feet per minute to capture organic vapors from a paint spray operation?
A 17-tooth 20 normal pressure-angle helical pinion with a right-hand helix angle of 30 rotates at 1800 rev/min when transmitting 4 hp to a 52-tooth helical gear. The normal diametrical pitch is 10 teeth/in, the face width is 1.5 in, and the set has a..
Calculate the strains in these directions, the changes in dimensions, (c) the volumetric strain and (d) the change in volume. Take E = 150 GPa and v = 0.3.
An engine, having 90% efficiency, produces 25 MW power. Calculate the power produced for the same inlet conditions and exit pressure if efficiency of engine is increased to 98% by redesigning it.
a projectile enters a resisting medium a x 0 with a initial velocity of vo 900 fts and travels 4 in. before coming to
Niobium forms a substitution solid solution with vanadium. Compute the number of niobium atoms per cubic centimetre for a niobium–vanadium alloy that contains 27 wt% Nb and 73 wt% V. The densities of pure niobium and vanadium are 8.57 and 6.10 g/cm3,..
three kilograms of air is in a pistoncylinder keeping constant pressure at 27 celsius 300 kpa. it is not heated to
a baloon rises with a constant velocity.a load is tied by a rope to the basket. when the baloon is at altitude h0 the
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