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A circular plate having a diameter of 300 mm is held perpendicular to an axisymmetric horizontal jet of air having a velocity of 40 m/s and a diameter of 80 mm as shown in Fig. 5-1. A hole at the center of the plate results in a discharge jet of air having a velocity of 40 m/s and a diameter of 20 mm. Determine the horizontal component of force required to hold the plate stationary.
a closed system contains 0.6 kg of helium at 156 kpa with a volume 0.4m3. this systme undergoes a polytropic process
Helium is to be compressed from 120 kpa and 340 K to 700 kPa and 460 K. A heat loss of 20 kJ/kg occurs during the compression process. Neglecting kinetic energy changes, determine the power input required for a mass flow rate of 89 kg/min.
a 2500 kg car traveling at 25.0 ms stops in a distance of 0.300 m after colliding with a tree. what is the acceleration
consider the arrangement described in problem 1. a cable attached to the 100 lbm piston exerts a 200 lb force upward on
a garden hose is open at one end and capped closed at the other. a swimmer in an above-ground pool fills the hose with
a 1 cm-wide 2 cm-long semiconductor device dissipates 5w and is mounted on a 2 cm-square 2mm-thick aluminum plate via a
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
Class 20 and class 60 gray cast irons have tensile strengths of about 20 and 60 ksi respectively. Assuming that the fractures start from graphite ?akes and that the ?akes act as preexisting cracks, use the concepts of Grif?th analysis to predict t..
ben johnson set a world record of 9.83 seconds in the 100-meter dash on august 31 1987. he had also set the record for
For the spring-mass-damper system (refer to Ogata Figure 4.1). (i) Find the equations of motion (the differential equation). Assume m = 1, b = 7, and k = 12. 1(ii) Assuming f(t) is a step function, find the Laplacian transform, X(s). (iii) Find the t..
1. a process water with a specific heat capacity of 4.182 k.1 kg-i k-1 flows at a rate of 0.050 kg s-i through a heat
you are attending the bonfire before the homecoming football game. the temperature of the air varies inversely with
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