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A typical coal-fired power plant has a generating capacity of about 1.3 X 10^9 W of electric power. the plant burns 4.6 X 10^7 kg of coal per day. The heat of combustion of coal is 6.2 X 10^6 J/kg. What is the overall thermal efficiency of the plant?
Two particles with charges +6e and -2e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 4.92 x 10-10 m apart. What is EPEfinal - EPEinitial, which is the change in the electric potent..
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. how fast was the pot falling at the top of the window? from what height above the top of the window was the pot dropped?
The core of a star collapses during a supernova, forming a neutron star. find the neutron star's angular velocity in revolutions per second, given the core's was originally 1.0 revolution per 30 days
A projectile is fired at time t = 0.0 s, from point 0 at edge of a cliff, with initial velocity components of vix=30m/s and viy = 100m/s. The projectile rises, and then falls into the sea at point P. The time of flight of the projectile is 20s.
For two concentric conducting rings the inner of the large ring in 12 cm and the outer radius of the smaller ring is 4 cm, Calculate the electric potential half way between the two rings 8 cm away from the center of the rings
Consider a merry-go-round that has the form of a disc with radius 5.4 m and mass 160 kg. If five children, what is the total moment of inertia
Thus, to eliminate the difficulties with motion sickness, designers must choose the distance between the astronaut's feet and the axis about which the space station rotates to be greater than a certain least value. What is this least value.
There are two horizontal forces on the 2.0 kg box in the overhead view of the figure below but only one is shown. find the second force.
A solenoid 300 turns having a length of 25.0 cm and a diameter of 10.0 cm has a current of 0.290 A.
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
Expected Values of 3-Year Hybrid Car Lease, Beverly Mills has decided to lease a hybrid car to save on gasoline expenses and to do her part to help keep the environment clean
A photoelectric-effect experiment determines a stopping potential of 1.93 eV while light of 200 nm is used to illuminate the cathode.
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