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Helium is to be compressed from 120kPa and 315K to 700kPa and 450K. A heat loss of 20kJ/kg occurs during the compression process. Neglecting kinetic energy changes, determine the power input required for a mass flow rate of 78kg/min. Round to nearest integer.. (kW)
The velocity profile for a fully developed laminar flow in a circular tube can be described using u = umax [1 – (r/R)2]. Obtain an expression for the shear force per unit volume in the x direction for this flow.
consider a household 120 v two-plug electric outlet protected by a 15 a circuit breaker. a you plug in a hair dryer and
For the pendulum shown in the figure,the restoring torque due to gravity is given by T=mgLsin(thita). Derive the linearised equation about the operation point thita=0.
The magnitude of the horizontal(to the right) for F1 is 5kN and F1 + F2 + F3 = 0. What are the magnitude of F2 and F3?
a fluid of viscosity micro is placed between two horizontal circular disks of the same radius r. the disk at z 0 is
a mixture of 1 mol of h2o 2 mol of o2 and 5 mol of n2 is heated to 2200 k at a pressure of 5 atm. assuming the
a certain metal frame supports a platform and motor. the combined mass of the platform and motor is 600kg. at a motor
two radio waves are used in the operation of a cellular telephone. to receive a call the phone detects the wave emitted
consider a house with inside air temperature of 22 degc. one of the walls of the house has three single-pane glass
suppose the rocket was initially on a circular orbit around earth with a period of 1.2 days.a what is its orbital
terminal speed for various objects falling through airmass cross-sectional area vtobject kg m2 msskydiver 75 0.70
1. write out the differences betweena close system and open systemgive one example and state what type of system it isb
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