Homework answers and tutorials

Waiting for answer What is the square root of 84?
2##sqrt(21)## Since 84 is not a perfect square, break it up into 2 factors. One of the factors should be the greatest perfect square integer that 84 is divisible by. In this case,...
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Waiting for answer What determines osmotic pressure?
The concentration of particles determines the osmotic pressure of a solution. In the diagram above, a semipermeable membrane separates a concentrated sugar solution on the left f...
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Waiting for answer Can you explain species diversity?
Species diversity refers to species richness and how evenly species' abundance is distributed. Species diversity refers to species richness and how evenly species' abundance is distr...
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Waiting for answer How long would it take light from the sun to reach Neptune?
The average distance form Sun to Neptune is 4501 million KM. Speed of light 300,000KM/sec. You will get 4.16 hours or 250 minutes.
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Waiting for answer How did the Korean War end?
The Korean War ended because of an armistice in 1953. After a long, 3 year war, the North and South were basically at a standstill, so the armistice was signed. Side Note: Technically, the war is still going on today because there is no peace agreement.
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Waiting for answer What are some examples of synthesis reactions?
A synthesis reaction, also known as a composition reaction, is characterized by the reaction of two or more substances chemically joining to form a single product. Here are three examples Magnesium metal reacts with oxygen to produce magnesium oxide ##2 Mg + O_2  2MgO## In this next example,...
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Waiting for answer Why can't we take a square root of a negative number?
It depends in which context you are. Taking a square root of a real number it's impossible beacuse any real number if squared gives a positive value. But, if you are in the context of complex numbers, then the picture changes. Actually complex numbers where first invented in order to overcome this...
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Waiting for answer What is the true meaning of conjunctive proposition and disj...
In testing the validity of logical expressions, conjunctive propositions use the word "and" while disjunctive propositions use the word "or". For starts, this question is more in th...
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Waiting for answer What are the building blocks of lipids?
Lipids consist of a glycerol molecule linked with at least one and a maximum of three fatty acids. Lipids are molecules which contain a glycerol molecule, a carbohydrate, and at leas...
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Waiting for answer Why are carnivores subject to biological magnification?
Because they are higher up in the food chain. In order to fully unpack this question, we must first understand what biomagnification is. In essence, biomagnification is the process...
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Waiting for answer What is another term for an independent clause?
Main clause or simply a sentence A sentence has a subject and a verb and expresses a complete thought. It is the same with the independent clause or the main clause.
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Waiting for answer What does discrete mean?
That the variable you are interested in can only take on specific values. This is best demonstrated with real life examples. Discrete variables can only be certain numbers, integers...
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Waiting for answer What is the difference between accuracy & precision? a....
Accuracy is how close to "right" something is. Precision is how consistent it is. A good analogy for this is a dartboard. If you throw it all close to the same place, but not near th...
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Waiting for answer How do you solve ##tan 4x = tan 2x##?
##{ pi/2 + 2kpi, k in Z }## Recall ##tanx = sinx/cosx## then, ##tan4x = (sin4x)/(cos4x) and tan2x = (sin2x)/(cos2x)## ##(sin4x)/(cos4x) = (sin2x)/(cos2x)## [Cross multiplying] #...
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Waiting for answer How do you find the limit of ##x/sinx## as x approaches 0?
##1## Let ##f(x)=x/sinx## ##implies f'(x)=lim_(x to 0) x/sinx## ##implies f'(x)=lim_(x to 0) 1/(sinx/x)=(lim_(x to 0)1)/(lim_(x to 0)(sinx/x))=1/1=1## NOTE The question was poste...
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Waiting for answer What did the Virginia and Kentucky Resolutions of 1798 and 1...
Its a longer answer than a sentence my friend... These Resolutions attempted to refuse the federal government's Alien and Sedition Acts, claiming them unconstitutional. The states'...
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Waiting for answer What is the LCM of 10, 15, 20 and 30?
##60## First, write out the prime factorization of each number ##10 = 2 xx 5## ##15 = 3 xx 5## ##20 = 2^2 xx 5## ##30 = 2 xx 3 xx 5## We can rewrite the above with more clarit...
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Waiting for answer What causes a lunar eclipse?
The alignment of earth in between and the Moon. The alignment of Earth in between the Sun and the Moon, as a result of which the Earth's shadow covers the entire moon.
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Waiting for answer How did the millerurey experiment model conditions of early...
The MillerUrey experiment passed a continuous electrical discharge simulating lightning through a mixture of gases that were thought to make up the early Earth's atmosphere. They us...
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Waiting for answer How do you graph ##y=2x5##?
##y=2x5## is a line. Determine the two points that this line intersects with the axes then connect these points to graph it. Given ##y=2x5## Set ##y=0## then solve for the absciss...
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