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If a coal burning electrical generating plant burns 2 tons of coal to generate 6000 kWh of electricity, calculate the efficiency of the plant as the ratio of electricity output to fuel energy input.
a disoriented physics professor drives 3.33 north then 4.69 west and then 1.61 south.1-use components to find the
A mass-spring system oscillates with an amplitudeof 4.40 cm. If the spring constant is 269 N/m and the mass is 403g, Determine the maximum acceleration
Light shines through a single slit whose width is 5.6 104 m. A diffraction pattern is formed on a flat screen located 4.0 m away. What is the wavelength of the light
The orbital radius of a planet about the sun is a) greater when the period of revolution is shorter b) greater when the period of revolution is longer c) greater when the mass is greater d) independent of the period of revolution e) greater when the ..
Water is pumped into the tank until the air pressure reaches 4.0 atm. The temperature is constant. Find out the height of the compressed air.
In the 1950s, an experimental train that had a mass of 25000 kg was powered across a level track by a jet engine that produced a thrust of 500000 N for a distance of 500 m. What would be the speed of the train after this distance
A 1.60 kg ball and a 7.20 kg ball are connected by an 80.0 cm long massless, rigid rod. What is the rotational kinetic energy of the structure
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 302 K and the refrigerator is kept at a temperature of 276 K. find the coefficient of performance of this refrigerator
The activity of a radioactive source decreases by 5.2% in 28 hours. What is the half-life of this source
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
a 2400 resistor and a 1.8 if capacitor are connected in series across a generator60hz 120v rms. determine the average
A "110-watt" lightbulb uses an average power of 110 W when connected to an rms voltage of 120 V. What is the resistance of the lightbulb? What is the maximum current in the bulb? What is the maximum power used by the bulb at any given instant of t..
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