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(1) Calculate the change in specific entropy of air as it is expanded from 2500kPa and 550 degrees C to 120kPa and 65 degrees C. Assume constant (average) specific heats.
A generator with an rms voltage of 130V is connected in series to a resistor 3.25 kilo-ohm, At what frequency must this circuit be operated for the current to lead the voltage by 24.0 degrees
It rolls at a steady speed for 1.9 s, then one wheel begins to stick. The train comes to a stop 6.0 m from its starting point. Illustrate what is the train's acceleration after its wheel begins to stick?
A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, compute the velocity of the stuck-together car and truck
A lab technician uses laser light with a wavelength of 640 nm to test a diffraction grating. How many lines per millimeter does this grating have
A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. What is the Carnot coefficient of performance, KC, of the refrigerator
q1. an airplane is flying with a velocity of 60.0 at an angle of 22.0 above the horizontal. when the plane is a
What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 16.5 V while a current of 7.50 A is charging it
A horizontal vinyl record of mass 0.10kg and radius 0.10 m rotates freely about a vertical axis through its center with a rotational speed of 5.10 rad/s.
A stone is thrown upward with an initial velocity of 6 m/s. What maximum height will the stone reach
A 7.89-kg fish swimming 4.23 m/s swallows an absent-minded 5.16-kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch
A string under tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.5 m at a speed of 20.4 m/s on a frictionless table. What is the breaking strength, in Newtons, of the string
Suppose the particle has a charge q = 2.6 ?C and is moving with a velocity of magnitude v = 1.2 × 103 m s?1, Draw a diagram to indicate the direction of the force on the particle
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