In the first part of the experiment, Part A, the standard solutions were prepared. As a whole, the experiment was conducted by four people, however, for Part A, the group was split in two to prepare the two different solutions. Calibrations curves were created for the standard solutions of both Red 40 and Blue 1. Each solution was treated with a serial 2-fold dilution to gain different concentrations of each solution.
The purpose of this experiment was to apply all knowledge gained from the entire semester while in the lab and apply it to be able to identify an unknown genus and species gram positive bacteria. Each student was given a petri dish with an unknown Gram positive bacterium inside. The petri dish with the unknown gram positive bacteria that was used in my experiment was #8. The possible bacteria inside my petri dish could be any of the following:
A. Hold the grating several inches from your face, at an angle. Look at the grating that you will be using. Record what details you see at the grating surface.
By determining the change in enthalpies for each step, we were able to add all of the individual enthalpies together to get the change in enthalpy for our goal reaction. The results can be seen in Figure 1. We were able to calculate qsol, qrxn, and ΔH using:
For example, at the 1st station the ruler was slightly off balanced. This could have affected the results because we could have used inaccurate quantities when determining our answer. Another example would be the clips at the ends of the board in station 5. Since they jutted out slightly at the end it added some length to the board. This most likely affected the angle between the board and string. Therefore we then could have used inaccurate quantities when determining our answer.
A number of different items were measured in this lab. For each of the following items, what did you find most challenging in making the measurement and how did that challenge affect the accuracy of the measurement?
The observed emission data for the different elements did not look how they were supposed to. However the “peaks” for Hydrogen were found to be 534.52 and 631.24, 534.70 and 569.11 for Helium and 529.73 and 630.71 for Mercury. The Rydberg’s Constant found to 1.1x107 8.5x104 while the known constant is 10967758.34m-1. The percent error of 0.29% and the accuracy of this reading is 99.7. The slope and intercept of the linear regression line is -0.01 3.3x10-5 and 0.02x10-1 1.9x10-6 respectfully.
Multicellularity is a condition of an organism to have multicellular cells. An example of a organism who has multicellular cells are plants, animals, and humans.
These small errors may be arised as a result of temperature. Because the accurate mesuring process took much time and during this time the temperature of water was decreasing. Among two methods the density bottle gives more accurate measurement of the volume, resulting in more accurate determination of density. One of disadvantages of hydrometer is that hydrometer has Operator dependent readings, therefore has limited accuracy. Morever, for measuring the density using hydrometer large sample volume is required.
In the experiment, the problem was the contaminants that were affecting the quality of the water samples. To fix this issue, three scientists had to determine the contaminants that were present in the samples. One sample was from the school sink and the second sample was from an unknown source. The scientists conducted many tests to figure out what pollutants were present in the water. In the experiment they used probes to test for pH, dissolved oxygen, total dissolved solids, conductivity, and turbidity. The probes hook up to the computer and collected the averages for each test. They collected this data and used it for later evaluation of the contaminates. They also tested for iron, copper, and chlorine with different tablets.
The overall purpose of this lab was to develop a lab procedure in order to separate and measure the mass of each containment obtained the provided sample.
“The use of the atomic bomb, with its indiscriminate killing of women and children, revolts my soul.”-Herbert Hoover. The effects of the atomic bombs were catastrophic in Japan and they impact many of their lives still today. The atomic bomb droppings in Japan have caused many mental, physical, and genetic disorders, as well as leaving many children orphaned, and causing fear that should not have had to been a part of Japanese citizens everyday lives.
The location I chose for my inventory lab rotation is the Warm Springs Rehab Hospital in Kyle, TX. Warm springs rehab is a Hospital where patients are getting treated will and will be taken good care of and its also a place to feel comfortable such as a home. Which I spent two hours there. At the beginning, we were introduced to the Caroline Holt which is the dietitian of the Warm Springs Hospital, Caroline showed me and my partner the kitchen and she explained what they do on a daily bases, we also saw the dishwasher area which was very neat, then she showed us the cooking area which was next to the cooler, which is easier for them when they need to cook, which everything was organized and clean. After that we went to the office which was
Over the years there have been many uses for nuclear science. Today I will share with you some information about the nuclear weapons used in World War II, like who created them, when and where they were made and tested, how they work, and the destruction they cause. Let’s get started.
Which one has a higher rate or respiration between dicotyledonous (peas) and monocotyledonous (maize) seeds and what is the effect of temperatures (room temperature, 40, 60) on the rate of respiration as determined by oxygen usage estimated with a respirometer?