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A particular coal-fired electric power station uses7.5x109 kg of coal per year to produce 950 MW ofelectrical power. The coal contains 2.4% sulphur bymass. If a scrubber is used to remove 85% of the sulphur fromthe exhaust gases in the form of CaSO3, what mass ofCaSO3 is produced annually?
A planet's moon travels in an approximately circular orbit of radius 6.6 x10^7 m with a time of 7 h 9 min. Calculate the mass of the planet from this information.
question when an electroscope is charged its two leaves repel each other and remain at an angle. what balances the
A star similar to our sun radiates energy at the prodigious rate of 4.2 x 1026 W. At what rate does this star convert mass into energy
a 6.2 cm diameter pipe gradually narrows to 4.0 cm. when water flows through this pipe at a certain rate the gauge
An ateroid in an elliptical orbit about the sun travels at 3.6 x 10^6 m/s at perihelion (the point of closest approach) at a distance of 2.7 x 10^8 km from the sun. How fast is it traveling at aphelion (the most distant point), which is 9.0 x 10^8km..
A toaster rated at 1040 Woperates on a 120 V household circuit and a 4.00 m length of nichrome wire as its heating element. calculate What is the cross-sectional area of the wire
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces, Find the electric field at the position of the electron
question two cars are traveling on a desert road. after 5.0 s they are side by side at the next telephone pole. the
Consider the record throws for the javelin, men 98.48 m (Zelezny, 1996, 0.800 kg) and women 72.28 m (Spotakova, 2008, 0.600 kg); discus, men 74.08 m (Schult, 1986, 2.00 kg) and women 76.80 m (Rensch, 1989, 1.00 kg); and shotput, men 23.12 m (Barne..
You are in a kayak which can move at a velocity of 4 m/s when in still water. You are attempting to cross a river which is 103 across, How long does it take you to get to the other side
A 1200N uniform boom at 65 to the horizontal is supported by a cable at an angle of 25. The boom is pivoted at the bottom, find the tension in the supported cable
Two air-track gliders m1 and m2 are joined together with a light string. What is the tension in the cord joining gliders
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