1. How would it affect organisms living in cold climates if oil
or alcohol were their main body fluid?
2. How do you think the cohesive nature of water relates to its
evaporation?
3. Describe in detail an experiment you could conduct to test
whether another substance could replace water.
In: Biology
The average sperm count in males is now lower than it was several decades ago. The reasons for lower sperm counts observed in males today is not known. Propose a hypothesis as to why, global, sperm counts are lower today than then were fifty years ago. What experiment could you do to test your hypothesis?
In: Biology
Consider the following reaction at 283 K:
2A + B → C + D
where rate = k[A][B]2. An experiment was performed where [A]o = 2.67 M and [B]o = 0.00241 M. A plot of 1/[B] vs. time has a slope of 10.01. What will the rate of this reaction be when [A] = [B] = 0.345 M?
In: Chemistry
A genetic experiment with peas resulted in one sample of offspring that consisted of 417 green peas and 153 yellow peas.
a. Construct a 90% confidence interval to estimate of the percentage of yellow peas.
b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
In: Statistics and Probability
A genetic experiment with peas resulted in one sample of offspring that consisted of 441green peas and 166 yellow peas.
a. Construct a 95% confidence interval to estimate of the percentage of yellow peas.
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b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
In: Statistics and Probability
Suppose every 10 times you cast your line into a lake you successfully get 3 fish. Assume you cast your line 100 times.
a) What is the probability of successfully catching exactly two fish in this experiment?
b) Calculate or approximate the probability that the number of fish you catch at least 5.
In: Statistics and Probability
A genetic experiment with peas resulted in one sample of offspring that consisted of 404 green peas and 154 yellow peas.
a. Construct a 95% confidence interval to estimate of the percentage of yellow peas.
b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
In: Statistics and Probability
3a. Many people believe that teenagers make emotional rather than rational economic decisions, particularly decisions about criminal behavior. That means that teens are not deterred by harsh penalties. What test does Levitt perform to determine if teens are deterred by harsher penalties? What natural experiment does he rely on? Be brief.
In: Economics
A genetic experiment with peas resulted in one sample of offspring that consisted of 416 green peas and 156 yellow peas.
a. Construct a 90% confidence interval to estimate of the percentage of yellow peas.
b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
In: Math
Question #48. In a titration experiment, 50 mL of 0.1 M acetic acid (Ka = 1.75 x 10-5) was titrated with a 0.1 M NaOH (formal concentration) at 25 ºC. The pH of the solution at the equivalence point will be this: Please show work (1) 7.00; (2) 8.73; (3) 9.06; (4) None of the above
In: Chemistry