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. A helium-filled balloon rises until its density becomes the
same as that of the surrounding air. If a sealed submarine
begins to sink, will it go all the way to the bottom of the
ocean or will it stop when its density becomes the same as
that of the surrounding water?
A 59yr old man, Koosei was admitted unconscious to the emergency room from a local bar days after DNA tests revealed he was not the biological father of his 6 children. The bartender revealed that he is able to eat only a half-ball of kenkey and black pepper and drinks lots of Oyaw Bitters. Lab result: Test Result Interpretation Blood alcohol 550mg/dl high Plasma Glucose 50mg/dl low Blood lactate 8mmol/L high Blood pH 7.21 low
(i) Give a diagnosis of the clinical condition based on the lab findings. (4mks)
(ii) State the biochemical basis for each of these four (4) results? (8mks)
(iii) Name two (2) biochemical pathways which will be affected in this condition? (4mks)
(iv) How will these pathways be affected? (4mks)
IQs are designed to be N(100,225).
a. To join Mensa an IQ of 138 is required. What percentage of the population are
eligible to join?
b. A psychologist claims that any child with an IQ of 150+ is ‘gifted’. How many ‘gifted’ children would you expect to find in a school of 1800 pupils?
A random sample of n=90| kilograms of corn is obtained from a population with u =272 and sigma = 5543 . Describe the sampling distribution for the sample means by computing the mu hat x and sigma_{x} (Use the indefinite population)
The average height of students in a freshman class of a certain school has been 158.55 cm with a population standard deviation of 8.8 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 51 students in the present freshman class has an average height of 154.25 cm? Use a 0.1 level of significance.
What are the given? Write only the number. :
population mean:Blank 1 cm
population standard deviation:Blank 2 cm
sample size:Blank 3
sample mean:Blank 4 cm
level of significance:Blank 5
What are the critical values? Write the positive critical value first then the negative.
z:Blank 6 andBlank 7
What is the value of the calculated z? Round your answer to the nearest hundredths.
z:Blank 8
At the center of a sphere of radius 0.5m a point charge of 2 nC is placed. What electric flux is passing through the sphere?
"It is claimed that a car is driven on the average less than 28700 kilometers per year with a population standard deviation of 2100 kilometers. To test this claim, a random sample of 58 car owners are asked to keep a record of the kilometers they travelled. Would you agree with this claim if the random sample showed an average of 22500 kilometers? Use a 0.01 level of significance.
What are the given? Write only the number. :
population mean:Blank 1 km
population standard deviation:Blank 2 km
sample size:Blank 3
sample mean:Blank 4 km
level of significance:Blank 5
What is the critical value?
z:Blank 6
What is the value of the calculated z? Round your answer to the nearest hundredths.
z:Blank 7"
The average height of students in a freshman class of a certain school has been 158.55 cm with a population standard deviation of 8.8 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 51 students in the present freshman class has an average height of 154.25 cm? Use a 0.1 level of significance.
What are the given? Write only the number. :
population mean:Blank 1 cm
population standard deviation:Blank 2 cm
sample size:Blank 3
sample mean:Blank 4 cm
level of significance:Blank 5
What are the critical values? Write the positive critical value first then the negative.
z:Blank 6 andBlank 7
What is the value of the calculated z? Round your answer to the nearest hundredths.
z:Blank 8
a metal has a specific heat capacity of .899 Jg-1k-1 How much energy is required to raise the temperature of 2.00 Kg of the metal by 80 K
The equilibrium constant Kp for the oxidation of sulphur dioxide into sulphur trioxide is 5.6x10⁴ at 350°C . if the partial pressure of SO2 and SO3 are 0.64 atm and 0.58 atm respectively, what is the partial pressure of O2 in the system?
2SO2+ O2-> 2SO3
