Sometimes our eye sight could fail us and we could have read the meniscus wrong, especially using a 10mL graduated cylinder. Most of our calculated dilutions had values in the tenths place so I may have read the meniscus too high or poured much more or less than needed. This could significantly affect the overall reaction and our data. Random Errors: 1. A random error could have been that the balance scale was no properly reset when we were trying to find the mass of the Magnesium strip.
al.). Some pollutants – for instance, polycyclic aromatic hydrocarbons – can lead to life-threatening diseases in humans and wildlife, such as cancer (Harvey). Scientists use many different methods to remove these pollutants from water supplies; one of those methods is the utilization of adsorption onto a porous substance, normally charcoal. Due to numerous circumstances, scientists have begun searching for alternatives to charcoal, one of them being Bentonite clay. However, Bentonite clay cannot be easily removed from the water, so in this project the students were instructed to modify the clay to make it magnetic and then compare its effectiveness in absorbing a model PAH against charcoal.
According to Marcela and an article from Cindy Cleary and Jo DelAmor, calcium in milk cannot be absorbed in our bodies because there is not a sufficient amount of magnesium. In order to absorb 1500mg of calcium, you would have to consume 750mg of magnesium; milk contains 300mg of calcium and 27mg of magnesium, you would need 123mg more of magnesium in order for the calcium in milk to absorb to its full potential. As a result, calcium from milk is deposited into soft tissue rather than bones (Cleary; DelAmor). The lack of absorption leads to other harmful problems such as kidney stones, arthritis, and gout. Milk also goes through a process called pasteurization, its intentions are to kill the bad bacteria, but it also strips away enzymes and nutrients that help digest the milk.
The relationship between Hamstring strength index 60 degree/s and the Shuttle run test is a negative relationship due to r moves away from zero in negative direction and r = −0.149, the strength of this negative relationships would be weak with r -0.5 r=-0.528**, is more significant since p =0.002< 0.01, where r = −0.498** is significant at p =0.004< 0.01. The smaller the p-value in a test of hypothesis the more significant the results are. 8. The researchers stated that the study showed a positive, significant correlation between Quadriceps strength indices and pre- and postoperative functional stability Considering the data presented in the Table 5, do you agree with their statement? Provide a rationale for your answer.
INCORRECT Drying the infant may increase heat production, but this is not the best method to correct the newborn's body temperature. B) Convective heat loss from evaporation is reduced. CORRECT Drying the infant quickly and placing her under a radiant warmer reduces heat loss through evaporation and radiation.  C) Newborns in an incubator are more difficult to access than those in a radiant warmer. INCORRECT Although a radiant warmer allows healthcare personnel easy access to the infant, that is not the reason for its use in this situation.
Possible experimental errors include not properly removing all the iron/salt/benzoic acid from sand. Residue in beaker and cups not completely removed for accurate mass weight. Another error could have been not properly drying the benzoic acid filter paper or sand mixture before weighing. Questions: A. How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise?
Would there be an overall negative side effect? If lactic acid did not burn there would be an overall negative side effect to the body. The lactic acid that was produced and diffused into the blood will just continue to collect in the blood stream. The pH levels of the blood will then be thrown off. The glucose that the liver usually converts from the lactic acid is no longer available and cannot be redistributed for more ATP.
Proper disposal methods should be effected to ensure the water aquifers around do not get contaminated. 5. After analyzing the arguments for and against fracking, state your position about whether people’s concerns are warranted. Absolutely people’s concerns are warranted, these chemicals in our water supply have cancer causing agents that hinder health. References Else, H. (2012).
In the end, chymosin took the shortest amount of time at 15 minutes to curdle and leaving us with the most curds. A possible error could have been at the start of the lab, where we exposed the test tube for too long. It could affect the results and outcomes because bacteria could have traveled inside when it was open for too long. It is possible that some of the curdling agents were taken in and out of our armpits too much, leaving us with inaccurate time. When it is taken in and out of our arms, it affects the heat, not allowing the product to get consistent heat temperature.
4. Why are boiling chips useful when boiling liquid? Discussion: In this experiment my partner and I misunderstood how far to carry the significant figures. We took them over two decimals places when it really only should have been one decimal place over. Because we didn’t count the proper number of significant figures in the volume we had too many when we went to calculate the density.