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Air enters an insulated turbine operating at a steady state at 5 bar, 1000K and exits at 1 bar, 500K. Neglecting KE and PE changes and assuming ideal gas behavior, find whether the expansion is internally reversible, irreversible or impossible.
A 22.5-mW laser beam of diameter 1.98 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
The flow rate of blood through the average human aorta, of radius 1.0 cm, is about 90 cm^3/s. What is the speed of the blood flow through the aorta
q1. if the focal length of the concave lens is -7.50 at what distance from the lens must an object be placed so that
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 8.0 s. Through how many revolutions does the tub turn during this 21-s interval
Our Sun has a radius of 7 x 10^8 meters. From the amount of thermal energy we receive on Earth, determine the average surface temperature of the Sun
Using focused laser light, optical tweezers can apply a force of about 14pN to a 1.1\mu m diameter polystyrene bead, Estimate the bead's acceleration in g's
When a 19.7 kg wheel with an angular speed of 2.30 rad/s is disconnected from a motor, a 0.219 N · m frictional torque slows the wheel to a stop. how long will it take for the wheel to come to rest
The current in a coil drops from 3.9 A to 1.8 A in 0.53 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil
A 72.4-kg skier coasts up a snow-covered hill that makes an angle of 23.2 ° with the horizontal. The initial speed of the skier is 8.14 m/s. What is the magnitude of the kinetic frictional force
q1. the coefficient of static friction between the 3000 lb cars tires and the road is 0.5. determine the steepest grade
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. How far should the eyepiece be from the objective
In a certain automobile engine with an efficiency of 20.9%, combustion of gasoline in one cylinder releases 510 J of heat. Find the work done by the system of gasoline vapor
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