Homework answers and tutorials

Waiting for answer How many different ways can you choose 3 vowels out of the b...
##10## different ways There are 5 vowels and we need to take 3 and order does not matter. Therefore, this is a combination problem. For example, ##A, E, O##, and ##E,O,A## and ##O,...
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Waiting for answer What is mitosis?
is the method by which cells make exact copies of themselves during cell division. The exact copies of the cells are needed for growth, development, and repair of tissue damage. Mitosis is an orderly series of events whose purpose is to evenly divide the chromosomes of a parent cell between two ne...
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Waiting for answer The volume of a cubeshaped box is ##27^5## cubic millimeter...
I found: ##243mm## Consider the cube of side length ##x##. The volume will be equal to ##x^3##. So if we have the entire volume, ##V=27^5##, we can take the cube root of it to get th...
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Waiting for answer How do you simplify the square root of 1.96 without a calcul...
First we need to get the decimal in to a fraction form. If you multiply it by 100 you will get an integer. Thus, ##sqrt(1.96)= sqrt(196/100)## now simplify the radicals ##sqrt(196/100)= sqrt(196)/sqrt(100)= 14/10=7/5 ##
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Waiting for answer How does the sun produce energy?
nuclear fusion In nuclear fusion, most of the mass of is changed into energy. Sunlight, infrared rays, ultraviolet rays, radio waves and xrays.
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Waiting for answer Silver iodide, ##AgI##, has a Ksp value of ##8.3 xx 10^17##...
Since you were given a ##K_"sp"## value, which is the solubility product constant for the equilibrium of a solid with its dissociated ions, we are evidently working with an equilibrium. Silver iodide equilibrates upon being placed into water: ##color(white)([("", color(black)("AgI"(s)), color(bl...
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Waiting for answer What is deforestation?
Deforestation is simply the destruction of forests. Deforestation is the human act of destroying forests whether tropical, coniferous, or any kind of forest. This is due to the usage...
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Waiting for answer What is the importance of a histogram?
A histogram is a quick way to get information about a sample distribution without detailed statistical graphing or analysis. Without needing to have a good graphing program, plotting...
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Waiting for answer How do you name alkenes with alcohols?
The basic rules for naming alkenes are the same as those for the nomenclature of alkanes, except that we change the suffix to –ene. Find the longest continuous chain of carbon atom...
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Waiting for answer How to calculate the effective nuclear charge of the 1s elec...
The effective nuclear charge experienced by a 1s electron in helium is +1.70. The effective nuclear charge ##Z_"eff"## is the net positive charge experienced by an electron in a multielectron atom. A given electron does not experience a full nuclear charge because the other electrons are sometim...
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Waiting for answer What is the solubility (in M) of PbCl2 in a 0.15 M solution...
Reaction: ##PbCl_2 rightleftharpoons Pb^(2+) + 2Cl^##; ##K_(sp) = 1.6 xx 10^(5)## Solubility of ##PbCl_2## ##=## ##7.11 xx 10^(4)## ##mol*L^(1)##. Now here ##K_(sp) = [Pb^(2+)]...
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Waiting for answer What are the oxidation numbers in the compound H2SO4?
H = +1, O = 2 S = +6 For this compound you must follow the oxidation number rules. Oxygen and hydrogen both follow the rules associated with oxidation numbers as neither of them are an exception in this case. The rules I am talking about are; Hydrogen is always +1, except when it is bonded to...
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Waiting for answer What is the learned behavior of a Black Widow Spider?
It eats the male spider while matting. During matting, the male have it's abdomen against the female fangs.While the male get it's palp to the female epygine the female can eat the...
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Waiting for answer How does the integumentary system help prevent dehydration?
The provides a waterproof layer to keep water inside the body. The integumentary system consists of the skin, hair, nails, glands, and nerves. Of these, it is the skin that prote...
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Waiting for answer What causes moon phases? Why is there only one full moon a...
Both Moon's daynight spinperiod and its orbital period around Earth are the same 29.53 d and the same hemisphere faces Earth. The gradual daynight transit across this face is observed in phases....
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Waiting for answer If two parallel lines cut by a transversal, then each pair o...
As I understand the meaning of "corresponding angles" corresponding angles are equal (only supplementary if they are right angles). See:https://www.mathsisfun.com/geometry/correspond...
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Waiting for answer How many full moons will occur this year?
The interval between full moon to full moon is 29.5 days. So there may be 13 full moons in one year. or 12 full moonjs. seelink for all full moons from2000 to 2020 https://www.cres...
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Waiting for answer What are some examples of monomers and polymers?
Example : monomer of polymer cellulose is betaGlucose monomer of simple polimer protein is alphaamino acid monomer of PE is ethylene monomer of Poly( hexamethylene adipamide) is two monomer Hexamethylene diamine and adipic acid A polymer (/ˈpɒlɨ...
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Waiting for answer A stop sign has the shape of a regular octagon. What is the...
The sum of the interior angles can be calculated easily by understanding where the formula comes from. In any polygon, you can divide it up into triangles by joining one vertex to a...
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Waiting for answer What is a satellite?
Satellite is an object which orbits or moves around planets. There are 2 different types of satellite. ##1:## Natural Satellite ##2:## Artificial Satellite ##1.## Natural Satell...
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