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A coal-fired plant generates 600MW of electric power. Theplant uses 4.8 X 10^6 kg of coal each day and the heat ofcombustion is 3.3 X 10^7 J/kg. The steam that drives the turbinesis at 300C and the exhaust water is at 37C. What is the Carnot efficiency?
A star is about 6.00 light years from Earth. How long would the trip take according to an Earth based observer
q1. you bring a 350-g wrench into the house from your car. the house is 15 c warmer than the car and it takes 2.52 kj
A 64kg human sprinter can accelerate from rest to 10 m/s in 3.0s. What is the average power output of the greyhound
An object slides down a frictionless inclined plane. At the bottom, it has a speed of 9.80 m/s. What is the vertical height of the plane
A student makes a simple ac generator by using a single square wire loop 15cm on a side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 1.8×10?2T, What is the maximum emf output
An ion with charge q is distance r from a molecule with polarizability (alpha). Find an expression for the magnitude force F
A 65 kg crate slides on a rough plane inclined upward at an angle of 28 degrees, what is the magnitude of the sliding friction force on the box, what is the coefficient of kinetic friction between teh box and the incline
If the coefficient of kinetic friction between tires and dry pavement is 0.82, what is the shortest distance in which you can stop an automobile by locking the brakes when traveling at 26.6 m/s
A 45.0 resistor, a 0.100 H inductor, and a 10.0 µF capacitor are connected in series to a 60.0 Hz source. The rms current in the circuit is 2.55 A. Find the rms voltages across the inductor
The root-mean-square speed at 299K is 483 m/s. What is its average translational kinetic energy at that speed
Let the building is 50 m tall, the initial horizontal velocity is 9.0 m/s, and the initial vertical velocity is 12.0 m/s. select your coordinates such that the positive y-axis is upward, and the x-axis is to the right, and the origin is at the poi..
A 54.0 kg ice skater is gliding along the ice, heading due north at 4.10 m/s. What is the minimum value of Ug that allows her to continue moving straight north
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