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An ideal (Carnot) engine has an efficiency of 43 percent. If it were possible to run it backward as a heat pump. Compute what would be its coefficient of performance?
When illuminated with light of 600nm (6*10^-7 m), the first dark fringe produced by a single slit lies a distance of 1.4 cm from the center of the screen placed 3.0 m from the slit
A think disk of radius R carries a surface charge σ. It rotates with angular frequency ω about the z axis, which is perpendicular to the disk and through its center. What is B along the z axis? What is the magnetic moment of the spinning disk?
A 0.0220 kg bullet moving horizontally at 450 m/s embeds itself into an initially stationary 0.500 kg block. How far does this combination travel before stopping
) If the pressure of the 2.2-cm3 volume is reduced to 1.2 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A magnetic field has a magnitude of 1.2x10-3 T, and anelectric field has a magnitude of 4.6x103 N/C. Bothfields point in the same direction. A positive 1.8μC chargemoves at a speed of 3.1x106 m/s in a direction thatis perpendicular to both fields.
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. Calculate the average density of the white dwarf
A wall clock has a minute hand with a length of 0.55 m and an hour hand with a length of 0.26 m. Take the center of the clock as the origin, and use a Cartesian coordinate system with the positive x axis pointing to 3 o'clock and the positive y ax..
A student draws the ray diagram shown in the figure but forgets to label the object, the image, which arrow represents the object, and which represents the image
A net force of 30 N accelerates a 6 kg mass over a distance of 12 m. What is the work done by this net force
The volume flow rate in an artery supplying the brain is 4.00 10-6 m3/s. If the radius of the artery is 4.80 10-3 m, determine the average blood speed
Which of the following statements is NOT a correct assumption of the classical model of an ideal gas? In each cycle of a Carnot engine, 100 joules of heat isabsorbed from the high temperature reservoir and 60 joules isexhausted to the low temperatu..
A 30-kg girl and a 25-kg boy face each other on friction-freeroller skates. What is the girl's speed
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