Homework answers and tutorials

Waiting for answer How many yards are in a tenth of a mile?
There are 176 yards in 1 tenth of a mile. If 1 mile is 1760 yards, then 1 tenth of a mile is 1 divided by 10 which equals 0.1, if you multiply 0.1 by 1760 you get 176 which is the n...
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Waiting for answer How do you find limits using a graph?
Assuming no points of discontinuity, the limit of a function as x approaches some number, c, can be found by finding the value of the function at x = c. In other words, for continuous intervals ##lim_(x c)f(x)=f(c)## Look at the graph of ##f(x)=x^2## below. As ##x 2##,the function value ap...
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Waiting for answer Is the dehydration and hydration of cobalt(II) chloride (##"...
Yes, it is. Anhydrous cobalt(II) chloride, ##"CoCl"""_2##, is actually hygroscopic , which means that it will readily attract water from its surroundings, usually moisture from the a...
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Waiting for answer What is the difference between a discrete uniform distributi...
An uniform distibution is a distribution that gives to all its values the same probability to occur. Continous case: the equal probability is given to all the values into an interval ##[a,b]##, which contains an infinite number of values. the value of the probability will depend on the range of...
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Waiting for answer How do you graph: ##y=3x^27?##
Because x is squared, the nonzero integers for x can be either positive or negative, and the result for y will be the same. The resulting graph will be a parabola. Sample Calculation: ##y=3x^27## If ##x=3##, ##y=3*3^27=3*97=277=20## ##y=20## If ##x=3##, ##y=3*3^27=3*97=277=20## ##y...
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Waiting for answer An astronaut has a mass of 100 kg and has a weight of 370 N...
##g=3.7N##/##kg## The weight(##w##) of an object with mass (##m##) in a gravitational field with strength(##g##) are related by the formula: ##w=mg## ##= g=w/m## In our case: ##=...
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Waiting for answer Write the net ionic equation for the reaction that will occu...
##SO_(3(s))^(2)+2H_((aq))^+rarrSO_(2(g)) +H_2O_((l))##
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Waiting for answer What is the opposite and reciprocal of pi3?
The opposite is what makes ##0## when added The reciprocal is what makes ##1## when multiplied Opposite: Usually you 'flip' the signs: ##pi+3## because ##(pi3)+(pi+3)=0## Recipr...
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Waiting for answer What biomolecules are found in the cell membrane?
Cell membranes contain a variety of biological molecules, notably lipids and proteins. Material is incorporated into the membrane, or deleted from it, by a variety of mechanisms: The cell membrane consists of three classes of amphipathic lipids: phospholipids, glycolipids, and sterols. The amount o...
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Waiting for answer What are factors affecting how fast a solid solute dissolves...
Factors that affect how fast a solid dissolves include surface area of the exposed to the , temperature of the solvent, and stirring. Surface Area If the solute is crushed, it wil...
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Waiting for answer How many rectangular faces does a hexagonal pyramid have?
Zero Here's an image of a hexagonal pyramid. I can't find any rectangular faces.
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Waiting for answer What are the steps of binary fission?
make copies of themselves through . Bacteria. Some are helpful and some make your throat sore! Did you ever wonder how there got to be so many of them? They keep pumping out exac...
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Waiting for answer How do you use the limit definition to prove a limit exists?
The formal definition of a limit is: ##lim_(x c) f(x) = L## means that for every ##epsilon 0##, there exists a ##delta 0## such that for every ##x## the expression ##0  xc  delta## implies ##f(x)  L  epsilon## We need to understand what this definition means. "for every ##epsilon...
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Waiting for answer In what year was Sputnik launched?
Sputnik was launched on October 4, 1957. Sputnik's launch led to the Space Race between the US and Russia. This made the tensions made by the Cold War even worse, as many Americans b...
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Waiting for answer Which elements are found in each of the layers of the earth?
The elements of each layer of earth is: Crust: oxygen silicon aluminium calcium iron sodium potassium magnesium Mantle: silicon oxygen iron magnesium Outer Core:...
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Waiting for answer What is the mechanism of FriedelCrafts alkylation?
A FriedelCrafts alkylation is a type of electrophilic aromatic substitution reaction in which an alkyl group becomes attached to an aromatic ring. The mechanism consists of three steps. Step 1. The alkyl chloride or bromide forms an adduct with a Lewis acid catalyst such as AlCl₃, FeCl₃, BF₃,...
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Waiting for answer Who were the Bolsheviks and what did they believe in?
The Bolsheviks were one of the parties in the Russian Social Democratic Labor Party (the Communist Party) The RSDLP (from which the Bolsheviks eventually split from) was a group of s...
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Waiting for answer What is the difference between speed and velocity and accele...
see explanation below Speed is the distance travelled per unit time irrespective of direction, so only magnitude is of importance, and that it is a scalar quantity. Speed can be cal...
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Waiting for answer What are autosomes?
The pair of chromosomes identical in both the male and female of same species are called autosomes (Chromosomes 122) . Those which are different are called sex chromosomes . You can see the chromosomes (unpaired) and the X and Y (sex chromosomes) below.
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Waiting for answer What is a factor of 100?
A factor of ##100## is any number that will divide into ##100## and give an integer result. There are 9 factors of 100 these are ##1, 2, 4, 5, 10, 20, 25, 50, 100##
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