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My name is Celine Ibrahim and I am a rising junior studying neuroscience at Harvard College. I've always loved tutoring and teaching and have done so for many years for many different age groups. I have proficient/advanced knowledge in a wide variety of subjects and I am eager and excited to teach!
Algae can be used for food and fuel. To maximize profit from algae production under artificial light, researchers proposed an experiment to determine the dependence of the efficiency of the process used to grow the algae on light intensity (“brightness”) that will bepurchased from the electric company. The algae will be grown on a flat sheet that will be continuously washed with dissolved carbon dioxide and nutrients. Light-emitting diodes (LEDs) will be used to illuminate the growth sheet. Photodiodes placed above and below the sheet will be used to detect light transmitted through and reflected from the algal mat. The intensity of light can be varied, and the algae can be removed, filtered, and dried. The amount of stored energy in the algal mats can be determined by calorimetry.A. Identify a useful definition of efficiency for this study and justify your choice.B. Frequencies of light emitted by the LEDs will not be variables but must be specified for the construction of the apparatus. Identify the frequencies of light that should be used in the experiment and justify your choice.C. Evaluate the claim that the experiment is based on the assumption that there is an upper limit on the intensity of light used to support growth of algae. Predict a possible effect on algal growth if light with too great an intensity is used and justify the prediction.D. Design an experiment by describing a procedure that can be used to determine the relationship between light intensity and efficiency
In Exercises 13–18, use the Remainder Theorem to find the remainder when ƒ(x) is divided by .$$f(x)=2 x^{2}-3 x+1 ; k=2$$
Solve. See a Concept Check in this section.The number of men and women receiving bachelor's degrees each year has been steadily increasing. For the years 1970 through the projection of 2014 , the number of men receiving degrees (in thousands) is given by the equation $y=3.9 x+443$ and for women, the equation is $y=14.2 x+314$ where $x$ is the number of years after $1970 .$ (Source: National Center for Education Statistics) (IMAGE CANNOT COPY)A. Use the substitution method to solve this system of equations. (Round your final results to the nearest whole numbers.)B. Explain the meaning of your answer to part (a).C. Sketch a graph of the system of equations. Write a sentence describing the trends for men and women receiving bachelor degrees.
Give the five-number summary for the following set of numbers and create a box-andwhiskerplot for it. (7 marks)26, 30, 38, 67, 59, 21, 17, 85, 22, 22
The Wong family had heating bills of $105, $110, $90, and $67 in the first 4 months of2018. The bills for the same months of 2019 were $110, $95, $75, and $76.a) In which year was the mean monthly bill higher? (4 marks)b) By how much? (1 mark)
For many years, scientist believed that proteins were the source of heritable information. There are manythousands of different proteins in a cell, and they mediate the cell's metabolism, producing the traits andcharacteristics of a species. Researchers working with DNA viruses proved that it is DNA that stores and passes on genes. They worked with viruses with an outer coat of protein and a DNA strand inside. How did they prove that it was DNA, not protein, which is the primary source of heritable information?a. The DNA and protein of the virus were tagged with different isotopes and exposed to host cell where only the DNA was transferred to the host.b. The DNA was tagged with an isotope, which was retained in the virus, proving it to be the genetic material.c. The viral protein was tagged with an isotope, and the host cell was infected by it. This protein was transferred to the host.d. The viral DNA, when sequenced, was found to be present in the host cell proving it to be the hereditary material instead of protein.
In the following exercises, solve each ticket or stamp word problem.Tickets for a basketball game cost $2 for students and $5 for adults. The number of students was 3 less than 10 times the number of adults. The total amount of money from ticket sales was $619. How many of each ticket were sold?
A soup container was forgotten in the refrigerator and shows contamination. The contaminants are probably which of the following?a. thermophilesb. acidophilesc. mesophilesd. psychrotrophs
Two cyclists, 50 miles apart, start riding toward each other at the same time. One cycles 4 miles per hour faster than the other, and they meet after 5 hours of riding.
A. Write an equation using the information as it is given above that can be solved to answer this problem. Use the variable r to represent the speed of the slower cyclist.
What are the speeds of the two cyclists? Put both values in the answer box, separated with a comma, and select the appropriate units.
