This activity focuses on vibratory motion. In particular, we look at pendulum motion. Put simply, vibratory motion is the back and forth motion of an object as a result of a restoring force or influence such as spring force (in the case of spring motion) and gravity (in the case of pendulum motion). Items Needed: string or yarn a small object that you can tie a string to and use as a pendulum bob a watch or timer a ruler

1. Hang or suspend an object using a string of length L = 20 cm.

2. Pull the object to one side and release.

3. Using a watch, measure the time t the object takes to make 10 complete swings.

4. The period T is the time it takes for an object to make 1 vibration or swing. Determine the period of the pendulum motion.

T= t 10 =2π √ L g

5. Using different lengths of string, perform several trials of the experiment.

6. In the report, describe and discuss your observations.

HELP ME WITH MY EXPERIMENT AND GATHER DATA

1. How did the chicken experiment illustrate the evolution of cooperation?

a. Because whole productive groups were selected instead of individuals, aggressive traits were selected against.

b. The chicken experiment does not illustrate the evolution of cooperation.

c. The hens were trained to live harmoniously by their handlers.

d. The most productive individuals were placed in a group together which created a population of super productive chickens.

2.Traits that were once adaptive can also be maladaptive depending on the context of the environment.

a. True

b. False

3. Adaptations can be the epitome of shortsighted selfishness, even harming everyone over the long run.

a. True

b. False

4. Which two species were offshoots of the Archaic Homo heidelbergensis?

a. Australopithecus afarensis and Paranthropus boisei

b. Homo sapiens and Homo ergaster

c. Homo sapiens and Homo neanderthalensis

d. None of the above.

5. Homo (sapiens) sapiens lived at the same time as Homo (sapiens) neanderthalensis.

a. True

b. False

1. How did the chicken experiment illustrate the evolution of cooperation?

a. Because whole productive groups were selected instead of individuals, aggressive traits were selected against.

b. The chicken experiment does not illustrate the evolution of cooperation.

c. The hens were trained to live harmoniously by their handlers.

d. The most productive individuals were placed in a group together which created a population of super productive chickens.

2.Traits that were once adaptive can also be maladaptive depending on the context of the environment.

a. True

b. False

3. Adaptations can be the epitome of shortsighted selfishness, even harming everyone over the long run.

a. True

b. False

4. Which two species were offshoots of the Archaic Homo heidelbergensis?

a. Australopithecus afarensis and Paranthropus boisei

b. Homo sapiens and Homo ergaster

c. Homo sapiens and Homo neanderthalensis

d. None of the above.

5. Homo (sapiens) sapiens lived at the same time as Homo (sapiens) neanderthalensis.

a. True

b. False

The reaction

                                    NO(g) + O₃ -> NO₂(g) + O₂(g)

was studied in 2 experiments under pseudo-first order conditions.

a) [O₃] = 1x10¹⁴ molecules/cc in excess

the [NO] varied as follows   {Note, time is in msec (1 msec = 1x10^-3 s)!}

            time (msec)                 NO (molecules/cc)

                        0                      6x10⁸  

                        100                  5x10⁸  

                        500                  2.4x10⁸

                        700                  1.7x10⁸

                        1000                9.9x10⁷

b) [NO] = 2x10¹⁴ molecules/cc in excess     

            time (msec)                 O₃ (molecules/cc)

                        0                      1x10¹⁰

                        50                    8.4x10⁹           

                        100                  7x10⁹

                        200                  4.9x10⁹

                        300                  3.4x10⁹

a) what is the order of reaction with respect to NO?

b) what is the order of reaction with respect to O_3?

c) what is the overall rate law?

d) what is the pseudo-first order rate from experiment a); what overall rate coefficient does this give? (overall rate should be in cm³ molecule^-1 s^-1.)

e) what is the pseudo-first order rate from experiment b); what overall rate coefficient does this give?

Medical testing: enzyme linked immunosorbent assay (ELISA) test for presence of antigen or antibody

EXPERIMENTAL PROTOCOL

In this laboratory, you will test seven different patients using a direct ELISA. We have access to serum samples from the main characters of the TV show The Big Bang Theory. You will test each of them for the presence of ZIKA virus and HIV, as well as perform a pregnancy test, using known antigens/antibodies for those diseases/test. Students will work in pairs. Serum for each character of the Big Bang Theory has been incubated overnight at 4°C in the wells of an ELISA plate.

1) Interpretations: Summarize the interpretation of the findings about the results and the experiment

2) Future Scientific Directions: suggest future experiments using as base the results obtained in the lab

3) Create a question to the lab experiement approach.

5)  Approach: Create a summary of the overall lab experiment. Hypothesis.

Conduct your own experiment by rolling a standard die.

(a) List the possible outcomes. (Enter your answers as a comma-separated list.)

(b) Perform the experiment 36 times. Make a table to record your results.

This answer has not been graded yet.

(c) Find the experimental probability for each outcome.

This answer has not been graded yet.

(d) Find the theoretical probability for each outcome. (Enter your probabilities as fractions.)

(e) Compare the experimental and theoretical probabilities. Are your results the same? Explain.

2. You are given a bag with 8 green marbles, 4 blue marbles, 14 yellow marbles, and 12 red marbles. Find the theoretical probability of each random event. (Enter your probabilities as fractions.)

(a) Drawing a green marble


(b) Drawing a red marble


(c) Drawing a marble that is not yellow

When researches incubate whole red blood cells with lactoperoxidase, hydrogen peroxide and radioactive iodine I 125 and then separate the proteins in SDS gel, several radioactive lines are obtained cause iodine binds to prominent tyrosine and histidine residues outside the cell membrane.
When researches incubate whole red blood cells with galactose oxidase and reduce them with sodium borohydride that contains tritium (H-BH43) several radioactive lines are obtained which are just some of the proteins that have been marked with radioactive iodine , thus galactose residues stand out of the cell.
a) Explain the difference in the number of proteins obtained in the two experiments above
b) Why the results of the second experiment do not reflect mark of all the sugars in the membrane?
c) What results will be obtained if we conduct an experiment identical to that described in the question but with inverse vesicles (these are closed vesicles containing all membrane components but where the outer leaf of the membrane turns inward and inward leaf outward)? Thank you!

Critical thinking exercise in Triola nd Triola biostatistics assignment

"From Data to Decision" on page 565 of the textbook. perform the one-way analysis of variance (ANOVA) for the data

Placebo group: 77, 61, 66, 63, 81, 75, 66, 79, 66, 75, 48, 70

10mg Treatment group: 67, 48, 79, 67, 57, 71, 66, 85, 75, 77, 57, 45

20mg Treatment group: 72, 94, 57, 63, 69, 59, 64, 82, 34, 76, 59, 53

Based on results, does it appear that there is sufficient evidence to claim that the drug lowers pulse rate? Are there any serious problems with the design of the experiment? Given this was only involving males, can we say that results apply to females? Is there a better way in measuring the drug's effectiveness in lowering pulse rates? How would you characterize the overall validity of the experiment? Based on available results, should the drug be approved?   

When researches incubate whole red blood cells with lactoperoxidase, hydrogen peroxide and radioactive iodine I 125 and then separate the proteins in SDS gel, several radioactive lines are obtained cause iodine binds to prominent tyrosine and histidine residues outside the cell membrane.
When researches incubate whole red blood cells with galactose oxidase and reduce them with sodium borohydride that contains tritium (H-BH43) several radioactive lines are obtained which are just some of the proteins that have been marked with radioactive iodine , thus galactose residues stand out of the cell. 
a) Explain the difference in the number of proteins obtained in the two experiments above
b) Why the results of the second experiment do not reflect mark of all the sugars in the membrane? 
c) What results will be obtained if we conduct an experiment identical to that described in the question but with inverse vesicles (these are closed vesicles containing all membrane components but where the outer leaf of the membrane turns inward and inward leaf outward)?