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Coal is combusted in a steam boiler. The specific coal contains 25 MJ/kg
If the boiler is 90% efficient, how much coal must be burned per hour to produce a stream thermal gain of 665 MJ/s.
Roughly how much CO2 will be produced by this boiler?
Block 1, of mass = 0.500 , is connected over an ideal (massless and frictionless) pulley to block 2, of mass , as shown. Assume that the blocks accelerate as shown with an acceleration of magnitude = 0.300 and that the coefficient of kinetic frict..
A bomb explodes into three identical pieces. One flies in the + y-direction at 12.5 m/s , a second in the - x-direction at 15.4 m/s. What's the direction of the velocity of the third piece
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
A cubical block of wood 0.110 m on a sideand with a density of 560 kg/m3 floats in a jar of water. Oil with a density of 750kg/m3 is poured on the water until the top of the oillayer is 0.034 m below the top of the block
A hot air heating system rated at 84,000 Btu/hr has an efficiency of 65%. determine the temperature of the outlet air
A boat moves through the water with two forces acting on it. One is a 1500 N forward push by the water on the propeller, What is the acceleration of the 1400 kg boat
A sound wave in air has a frequency of 500 Hz and a wavelength of 0.68 m. What is the air temperature
A rocket is traveling at speed V along the x axis of frame S. It emits a signal (for example, a pulse of light) that travels with speed c along the y' axis of the rocket's rest frame S'. What is the speed of the signal as measured in S?
One section of a steel railroad track is 27 m long. If its temperature increases by 22 K during the day, how much does the track expand
q. a a diamond is underwater. a light ray enters one face of the diamond and after that travels at an angle of 30
A 10 kg block has an initial velocity of 6 m/s as it starts up a 30° incline. What is the magnitude of the friction force acting on the block
Light traveling through air (Nair=1) strikes the surface of a pool (Nwater=1.33) at an angle 0f 60 degrees relative to the surface normal. What are the reflected and reflected angles for the light
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