When light strikes the surface of a medium such as water or glass, its intensity decreases with depth. The Beer-Lambert-Bouguer law states that the percentage of decrease is the samefor each additional unit of depth.In the ocean, the photic zone is the region where there is sufficient light for photosynthesis to occur. (See the figure below.) For marine phytoplankton, the photic zone extends from thesurface of the ocean to a depth where the light intensity is about 1% of surface light. Consider a region of the ocean where the depth of the photic zone is about D = 18 meters. In thisregion of the ocean, by what percentage does light intensity decrease for each additional meter of depth? (Round your answer to two decimal places.)22.6X%TD4

Given information:Photic zone extends from the ocean to the depth by its 1% of light intensity of…

Answered: When light strikes the surface of a…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Topic: First Order ODEsA room is injected with a constant amount of helium as part of a tracer gas test, wherein concentrated amount of inert gas is injected at negligible flow rate. The room, with a total volume of 200 m3 has an initial helium concentration of 0.00 μg/m3. Cross-ventilation rate, which is the rate at which natural air enters and leaves the room, was measured at 75 m3/hr. If helium is injected into the room at a rate of 100 μg/hr, determine the helium concentration in the room as a function of t. Assume that external helium concentration is also 0.00.
Bacteria is being cultured in an agar plate. It was observed that the growth of bacteria is proportional to the bacterial population itself. In an experiment done between 12:00NN and 2:00PM, the population triples. At what time should the population be 100 times than it was at noontime?
I repost this question and request for the sub parts (d,e,f and g) to be solved.
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Please answer a & b. Thank you! The first case of COVID in the Philippines was recorded at the end month of January 2020. At the end of September 2020, around 312,000 were already infected with the virus. If this COVID-19 trend continues and the case grows at a rate proportional to the present case. find a.) the expression for the approximate number of positive cases in the Philippines at any time t,b.) the time for the country to reach 1 million COVID cases?
Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain (fruit < vegetables < cereals < nuts < corpse). Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. The Hill of Tara is a very important archaeological site in Ireland. It is by legend the seat of Ireland's ancient high kings†. Independent random samples from two regions in Tara gave the following phosphorous measurements (ppm). Assume the population distributions of phosphorous are mound-shaped and symmetric for these two regions. Region I: x1; n1 = 12 540 810 790 790 340 800 890 860 820 640 970 720 Region II: x2; n2 = 16 750 870 700 810 965 350 895 850 635 955 710 890 520 650 280 993 (a) Use a calculator with mean and standard deviation keys…
Weber's law, a concept taught in most Introduction to Psychology courses, states that the ratio of the intensity of a stimulus to the "just noticeable" increment in intensity is constant, that is, the ratio doesn't depend on the intensity of the stimulus. The ratio is called the "Weber fraction," so a concise statement of Weber's Naw is that "the Weber fraction is constant, regardless of the stimulus intensity." It turns out that Weber's law is not so much a law as it is a rule of thumb, since it is violated in many situations. For instance, for some auditory stimuli, the Weber fraction does depend systematically on the stimulus intensity. %3D The following bivariate data are the experimental data obtained for one listener in an auditory intensity discrimination task. For each of the ten stimulus intensities x (in decibels), the Weber fraction y (in decibels) is shown. Figure 1 is a scatter plot of the data. Stimulus intensity, x (in decibels) Weber fraction, y (in decibels) 1+ 35…
. At wind speeds above 1000 cm/sec, significant sand–moving events begin to occur. Wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. The cyclic nature of wind and moving sand determines the shape and location of large dunes. At a test site, the prevailing direction of the wind did not change noticeably. However, the velocity did change. 75 wind speed readings gave an average velocity of x =1045 cm/sec. Based on long–term experience,  can be assumed to be 240 cm/sec Find a 99% confidence interval for the population mean wind speed at this site. (Round your answers to the nearest whole number) (DO A MANUAL CALCULATION, SHOWING ALL WORK INCLUDING THE EQUATION USED AND THEN WITH ALL VALUES PLUGGED INTO THE EQUATION)(SHOW WORK ABOVE) [final answer] Margin of Error: E = (value with units)[final answer] Confidence Interval : _________________ < __________________ < __________________ (value with units) (correct symbol) (value with…
Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain (fruit < vegetables < cereals < nuts < corpse). Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. The Hill of Tara is a very important archaeological site in Ireland. It is by legend the seat of Ireland's ancient high kings†. Independent random samples from two regions in Tara gave the following phosphorous measurements (ppm). Assume the population distributions of phosphorous are mound-shaped and symmetric for these two regions. Region I: x1; n1 = 12 540 810 790 790 340 800 890 860 820 640 970 720 Region II: x2; n2 = 16 750 870 700 810 965 350 895 850 635 955 710 890 520 650 280 993 (a) Use a calculator with mean and standard deviation keys…

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