Homework answers and tutorials

Waiting for answer On the cosmic calendar, about when did Earth form?
January 1 big bang. FEBRUARY 11, 2016 BY THREEPOINTEIGHTBILLIONYEARS.COM (3.bp.blogspot.com ) (3.bp.blogspot.com ) On his calendar (dates here are from the Wikipedia version), takes place on January 1, the Milky Way takes shape around March 11, our Sun appears on September 2 with its planets soo...
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Waiting for answer What does the word aqueous mean?
Aqueous is a term used to describe a system which involves water. Aqueous is a term used to describe a system which involves water. The word aqueous is also applied to a solution or...
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Waiting for answer What is ##sqrt(1/90)##?
##(sqrt 1)/(sqrt90)=(sqrt 10)/(30)## Simplify. ##(sqrt 1)/(sqrt90)## Simplify ##sqrt 1## to ##1##. ##1/(sqrt90)## Factor ##sqrt 90##. ##1/(sqrt (3xx3xx2xx5))## Simplify. ##1/(...
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Waiting for answer What is the opposite and reciprocal of 2pi?
opposite of any number is the same number but with opposite sign ∴opposite of ##color(blue)(2pi## is ##color(blue)(−2pi## to generalise, the reciprocal of number ##color(orange)(x##(any number) is ##color(orange)(1/x## here note that the sign of the number does not change at all . so, the recip...
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Waiting for answer How do you find the derivative of ##y= 10^(1x^2)## ?
The answer is : ##y'=2ln10*x*10^(1x^2)## Solution: let's ##y=a^f(x)##, where a is some constant and ##f(x)## is function of ##x## then, ##y'= a^f(x)lna*f'(x)## Similarly, if we follow this , we will get ##y'=10^(1x^2)ln10*(2x)## After rearranging, we get ##y'=2ln10*x*10^(1x^2)##
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Waiting for answer Is plate tectonics a scientific law or theory?
It's a theory. It's too complex to be reduced to a law A law is almost mathematical in its essence. Newton's Law of motion is a property of motion that almost cannot be derived from...
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Waiting for answer What is a predicate?
In English, a predicate is basically everything in the sentence other than the subject. For example: I am going to the bank. "I" is the subject, and "the bank" is the object. (Subje...
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Waiting for answer What is an oligopoly?
Oligopoly is a market situation in which there are few sellers competing against each other, using price/product differentiation as their tools to gain marketshare . The main attribute of oligopoly firms is that, similar to monopoly situations, the ability to enter the market (telecoms or motor m...
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Waiting for answer How many nanometers are there in 1 cm?
##1## centimeter has ##10,000,000## i.e. ##10## million nanometers. Standard unit in this system is ##1## meter. There are a billion i.e. ##1,000,000,000## nano units in a standard...
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Waiting for answer How many ions in, Mg(NO3)2?
3. (i) one magnesium ion ##(Mg^(2+))## and two nitrate ions ##(NO_3)^##
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Waiting for answer How does the electron cloud model differ from the Bohr model...
The electron cloud (Schrodinger) model is the current model. The electrons are in no set order or "orbit", but they can be predicted, though only to a particular uncertainty. In the Bohr, an older model, the electrons are found in predictable amounts in set orbits. This model, though possessin...
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Waiting for answer What are some examples of matter?
The official answer: Matter is anything that has mass and volume. If you can weigh something and if you can see something, it's matter. The answer that actually makes sense: Matter is what we refer to when we say "stuff." If I've got a hammer or a dead squirrel in my closet, I'd say that there'...
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Waiting for answer Why is water liquid where as H2S is gas at room temperature?
Because there is no hydrogen bonding between molecules of H2S. Oxygen is a very electronegative element, so in the OH bonds, it draws the bonding electrons towards it, making one side of the molecule more positively charged than the other. In water, the slightly negative side of one molecule (the...
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Waiting for answer What is the greatest common factor of 42, 126, and 210?
The GCF = 42 The prime factors of 42 = 2,3,7 The prime factors of 126 = 2 , 3 , 3, 7 The prime factors of 210 = 2,3 ,5, 7 The common values are ##2*3*7= 42## The GCF = 42
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Waiting for answer What is not a trait of the members in the kingdom Archaebact...
The organisms classified as Archaebacteria have the following characteristic features. Presence of cell walls; Contain fatty acids in cells; Presence of complex RNA. The structure of walls varies depending on the . The cell wall lacks peptidoglycan, which distinguishes it from . The membrane compri...
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Waiting for answer How do autosomal traits differ from sexlinked traits?
The autosomal chromosomes are the non sex chromosomes. The sex chromosomes determine the sex of an individual. In humans we have 23 pairs of chromosomes in total. This is made up of 22 pairs of autosomal chromosomes and one pair of sex chromosomes. The autosomal pairs are all recognisable by speci...
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Waiting for answer What is the scientific definition of half life?
Halflife ##(t_½)## is the time required for a quantity, or phenomenon to be reduced to half its initial value by whatever process is appropriate. The term is very frequently found i...
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Waiting for answer What is an ion?
An ion is an atom, or a collection of covalentlybonded atoms, that all together has a charge. This is either because it has more electrons than they would have in the neutral state (making it an anion) or fewer electrons (making it a cation). Monatomic ions are those that consist of only one atom...
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Waiting for answer What did the New Jersey Plan suggest?
A unicameral legislature with equal representation for all states. This was the opposition offered against the Virginia Plan, which wanted a bicameral legislature with both houses'...
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Waiting for answer Why were colonists angry about British officers using writs...
Writs of assistance angered colonists because they allowed for unwelcome invasions of privacy and more persecution of colonists. When the unintentional British policy of "salutary ne...
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