Potential energy of water converted to electric energy
Water flows over Victoria Falls, which is 128 m high, at an average rate of 1.80 x 106 kg/s. If one third the potential energy of this water were converted to electric energy, how much power would be produced by these falls?
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Does your experimental drug affect cholesterol? You run a study where the 15 subjects in group #1 receive the experimental drug and the 15 in group #2 receive a placebo. A t-test on your data yielded an observed value of 2.01.
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Claim: Movie patrons have IQ scores with a standard deviation that is less than the standard deviation of 15 for the general population. A simple random sample of 40 movie patrons results in IQ scores with a standard deviation of 14.8.
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Association of Realtors , 44% of U.S. homes sold in March 2010 wre purchased by first time home buyers. A random sample of 170 people who just purchased homes is selected. Calculate the standard error of the proportion and
A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 5.0 m/s at the end of 2.0 s. At that instant, the kinetic energy of the system is 100 J and each mass has moved a distance of 5.0 m. Determine
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Assume you are in charge of a production line which allows for no more than 1% defectives in order to be in compliance. A random sample of 500 is tested and 4 defective items are found. Based upon this evidence, is your production line in complian
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