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A plate of iron is exposed to a carburizing (carbon-rich) atmosphere on one side and a decarburizing (carbon-deficient) atmosphere on the other side at 700?C. If a condition of steady state is achieved, calculate the diffusion flux of carbon through the plate if the concentration of carbon at positions of 5 and 10 mm beneath the carburizing surface are 1.2 and 0.8 kg/m3, respectively. Assume a diffusion coefficient of 3 × 10-11 m2/s at this temperature.
Taking air samples at random times during a 2-month period, an environmental group finds the standard deviation of ozone concentration measurements in the vicinity of a chemical plant to be 0.03 parts per million (ppm).
2800 people were surveyed about their recent purchases. 715 of those people surveyed bought a television within the last year, 461 bought a video game system within the last year, and 292 bought both.
in a home theater system the probability that the video components need repair within 1 year is 0.04 the probability
a man claims to have extrasensory perception. as a test a fair coin is flipped 26 times and the man is asked to predict
question a researcher is interested in comparing tastiness of different kinds of cheese in grilled cheese sandwiches.
The data presented in the table below resulted from an experiment in which seeds of 5 different types were planted and the number of seeds that germinated within 5 weeks after planting was recorded for each seed type.
i. suppose an influenza epidemic strikes a city. in 10 of families the mother has influenza in 10 of families the
Explain why the allocation that would occur if consumers could costlessly resell a good is the same as the allocation from efficient rationing.
the inmates at oklahoma prison make an average of 437 license plates pr day. the warden feels that their production
Many entrepreneurs have donated money to various causes. Data on the total amount pledged and remaining net worth for the 10 top donors are given in the table. Complete part a through d.
A personnel manager has a computer-generated list of all employees that indicates that 70 percent are full-time employees, 20 percent are part-time employees, and 10 percent are furloughed or laid-off employees.
A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on risk of cardiovascular disease.
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