case studies ,surveys ,naturalistic observation , and laboratory observation are examples of descriptive or correlational researches methods . using these methods researchers can describe different events ,experiences,or behaviours and look for links between them
Psychologists study mental processes and human behavior by observing, interpreting, and recording how people and other animals relate to one another and the environment. ... Research methods vary with the topic which they study, but by and large, the chief techniques used are observation, assessment, and experimentation.
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Assume that a 100 cm3 soil core weighs 78g when oven-dried and 123 g when saturated. Calculate the total pore space and total porosity. Show all of you work.
To calculate the total pore space, we will find the difference between the mass of the soil when it is oven - dried and when it is saturated. Therefore, the value of the total pore space and total porosity are 45g and 45% respectively
Given that a 100 cm3 soil core weighs 78g when oven-dried and 123 g when saturated.
The given parameters are;
Volume of soil V = 100[tex]cm^{3}[/tex]
Mass ( Oven dried) [tex]M_{1}[/tex] = 78g
Mass ( Saturated) [tex]M_{2}[/tex] = 123g
In the soil formation, pore space refers to the volume of soil. And to calculate the total pore space, we will find the difference between the mass of the soil when it is oven - dried and when it is saturated. That is,
Total pore space = [tex]M_{2}[/tex] - [tex]M_{1}[/tex]
Total pore space = 123 - 78
Total pore space = 45g
And total porosity will be the percentage of the ratio of total pore space to the given volume of the soil. That is,
Total porosity = (Total pore space / volume of the soil) x 100
Total porosity = 45/100 x 100
Total porosity = 0.45 x 100
Total porosity = 45%
Therefore, the value of the total pore space and total porosity are 45g and 45% respectively
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Which of the following sentences is punctuated correctly? A. Tory was waiting for her mom, at the mall, which was going to close soon. B. Tory was waiting (for her mom at the mall) which was going to close soon. C. Tory was waiting for her mom at the mall, which was going to close soon. D. Tory was waiting, for her mom at the mall—which was going to close soon.
Answer:
C is the correct sentence
A prerequisite is something you need before you can continue in a training or educational program.
False
True
Answer:
The answer is True
Explanation:
It might be difficult to comprehend information if you do not have the necessary prerequisites. What is a prerequisite? It is something that is necessary to be familiar with or comprehend before learning or understanding anything new. In our example, you would need to know how to walk before you could learn to run since it is a requirement to learning how to run.
Hereditary spherocytosis (HS) is a disorder of red blood cells that causes the cells to be smaller and spherical instead of having the usual flattened, biconcave shape. The average diameter of normal red blood cells is 7.2μm, and the average diameter of red blood cells in a person with HS was found to be 6.7μm. The normal red blood cell has an average surface area of 136μm2 and an average volume of 91μm3.
Which of the following provides an accurate calculation of the surface area to volume ratio of an HS red blood cell, as well as a prediction of its effect on the efficient transferring of oxygen compared to a normal red blood cell?
The statement that provides an accurate calculation of the surface area to volume ratio of an HS red blood cell is The ratio is 0.89, and the cells are less efficient at transferring oxygen.
The ratio 0.89 is less than the ratio that is seen in a normal red blood cell, therefore, the cell would be less organized at moving oxygen.Hereditary spherocytosis (HS) is often referred to as a disease that can be inherited. It is known to affects the red blood cells.
Its symptoms includes the killing of red blood cells in the spleen and their removal from the blood stream amidst others.
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Hereditary spherocytosis (HS) is a disorder of red blood cells that causes the cells to be smaller and spherical instead of having the usual flattened, biconcave shape. The average diameter of normal red blood cells is 7.2μm, and the average diameter of red blood cells in a person with HS was found to be 6.7μm. The normal red blood cell has an average surface area of 136μm2 and an average volume of 91μm3.
Which of the following provides an accurate calculation of the surface area to volume ratio of an HS red blood cell, as well as a prediction of its effect on the efficient transferring of oxygen compared to a normal red blood cell?
A The ratio is 0.45, and the cells are more efficient at transferring oxygen.
B The ratio is 1.12, and the cells are less efficient at transferring oxygen.
C The ratio is 0.89, and the cells are less efficient at transferring oxygen.
D The ratio is 141, and the cells are more efficient at transferring oxygen.
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