explain in details why is it not possible to have 100% safety in case of disaster.

if you have 100 ml of HA with a pKa of 2.91, and 30.00 mL of 0.200M NaOH was needed to reach the equivalence point at pH 7.7. What was the initial pH right before you started the titration?

The vapor pressure of the dietary ether is 100 Torr at -115 ° C and 400 torr at 17.9 ° C

a)Calculate the heat of vaporization and the normal boiling point in a city where the barometric pressure is 620 torr

b) Calculate the entropy of vaporization at the boiling point

c) ΔG of vaporization at 25 ° C

assume that IQ score are randomly distributed with a mean of 100 and a standard deviation of 15 . if 49 are randomly find the probability that their mean IQ score is greater than 98

The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Listed below are IQ scores of randomly selected professional pilots. It is claimed that because professional pilots are a more homogeneous group than the general population, they have IQ scores with a standard deviation less than 15. Test that claim using a 0.05 significance level. 121 116 115 121 116 107 127 98 116 101 130 114 Identify the test statistic, -value or critical value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Assume that a simple random sample is selected from a normally distributed population.

A tsunami with a 2 m amplitude (A) and 100 km wavelength (L) is approaching an island coast traveling through 1000 m deep water. An oceanographer quickly applies the equation c=sqrt[gL/(2pi)] to figure out the phase speed (c) is 400 m/s. Observations later show that the tsunami arrived 4 times slower than the oceanographer’s predictions. Did the oceanographer do something fundamentally wrong or was this the best theoretical prediction someone could make quickly? Explain your answer in detail. Also, calculate the period (T) of this tsunami.

2. A random sample of 100 patients with virus found that it was fatal in 18 people and 182 people eventually made a full recovery. In a random sample of 300 SARS patients, 34 died.

a.) Verify your conditions for inference

b.) Calculate a 90% confidence interval for the true mean difference in the proportion of virus cases that were fatal and the proportion of SARS cases that were fatal.

c.) If you were to create a 95% confidence interval, would it be wider or narrower?

Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 17. Use the empirical rule to determine the following. ​(a) What percentage of people has an IQ score between 49 and 151​? ​(b) What percentage of people has an IQ score less than 83 or greater than 117​? ​(c) What percentage of people has an IQ score greater than 151​?

. The expected mean of a normal population is 100, and its standard deviation is 12. A sample of 49 measurements gives a sample mean of 96. Using the α = 0.01 level of significance a test is to be made to decide between “population mean is 100” or “population mean is different than 100.” a) State null H0. b) What conclusion can be drawn at the given level of significance α = 0.01. c) What conclusion can be drawn if α = 0.05? d) What is the p-value of the test? e) State the type I and II errors. f) What is probability of type II error when, if mean μ really is 102 and α = 0.05 ?