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Over a 30-day period a power plant generates an average of 691 MW of electrical power and 1127 MW of waste heat, and burns 1.68×108 kg of coal. Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion during the 30 days? During the 30 days, how much mass is converted into energy?
A satellite has a mass of 5950 kg and is in a circular orbit 4.60 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.15 106 m. What is the true weight of the satellite when it is at rest on the pl..
What is the resistance of an immersion - type heating coil if it is to generate 15 kV of heat per minute when it is connected to a 120 - V source
A straight 2.30 wire carries a typical household current of 1.50 (in one direction) at a location where the earth's magnetic field is 0.550 gause from south to north. Find the magnitude of the force that our planet's magnetic field exerts on this c..
a lower tank contains water while an upper tank contains air with a negligable concentration of water vapor. what mass of water vapor diffuses through the tube each hour
An airplane flies 200km due west from city Band then 285 km in direction of 28 degrees north of west from city B to city C. in a straight-line distance how far is city C from city A.
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of -0.40 rad/s^2 has an angular velocity of 1.5 rad/s, What is the angular position of the wheel at t = 2.0 s
Suppose the solar insolation is 850 W/m2 and you can collect 20% of the energy that fall on the surface of a solar hot dog cooker. If you need 240 W to cook a hot dog, what is the minimum area required?
On a cold winter's day heat leaks slowly out of a house at the rate of 25.0kW. find the rate of entropy increase
Initially, an object is 12cm to the left of a convex lens of focal length 8.2cm, then a concave (diverging) lens of local length -9cm is placed 20cm to the right of the convex lens, find the Image distance from concave lens
In order to calibrate the strength of an Fe-55 source, many measurements of the radiation field are made with the same detector located at different distances.
100.0 W tungsten filament bulb generates 95.0 W of heat, determine difference in temp. between inner and outer surface of glass
A bucket filled with dirt of mass 20 kg is suspended by a rope that hangs over a pulley of mass 30 kg and radius 0.25 m. Everything is initially at rest.
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