Homework answers and tutorials

Waiting for answer How did the great auk become extinct?
There were a number of factors that seemed to be involved in the lost of the Great Auk. Firstly, the Great Auk bred on rocky, isolated islands with easy access to the ocean and a plentiful food supply, a rarity in nature that provided only a few breeding sites for the auks. So not many were hatche...
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Waiting for answer What is sin and cos if## tan = 1/2## and ##sin >0##?
Hi. By definition, ##tantheta=sintheta/costheta##, with ##theta## being the angle. But be careful, that makes us wish to say that: ##tantheta=sintheta/costheta=1/2= sintheta=1 and costheta=2## and that is not correct! Cosine and Sine are functions that oscilate between ##1## and ##1##, never (n...
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Waiting for answer What is the Derivative of root x + 1/root x?
See explanation. If you mean: ##sqrt(x)+1/sqrt(x)## Derivative is given by: ##1/(2sqrt(x))  1/(2sqrt(x^3))= (x1) / (2x^(3/2))## Wolfram Computational Engine If you mean: ##sq...
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Waiting for answer Find the value of x if the right prism has a volume of 24 m^...
Without any indication of how ##x## relates to the right prism, this question can not be answered. Based on the diagram I assume the "right prism" is a triangular right prism. In th...
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Waiting for answer How do you calculate specific heat capacity of an unknown me...
To calculate the capacity of a substance, use the formula ##Q = m C Delta T## where Q is the quantity of heat (energy) needed to raise the temperature of 1 kg of a substance by 1°C, measured in J; m is the mass of the substance, in kg; C is the specific heat capacity of the material, in ##J/(kg *...
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Waiting for answer What does the atomic number of an element mean?
The number of protons or electrons an atom has. is organised by the . If you look at it, you will see it begin at hydrogen with ##1##, then ##2##, helium, ##3##, lithium, ##4##, ber...
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Waiting for answer What is a rule for determining the mass number of an atom?
Mass number is the sum of the protons and neutrons in the atomic nucleus. The (##"A"##) is the sum of the (##"Z"##), which is the number of protons, and the number of neutrons (##...
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Waiting for answer What kind of simple machine is a pliers?
Pliers are an example of a lever. The handles are longer than the jaws of the pliers. When pivoted around the joint, the force on the handles is multiplied in proportion to exert more force to objects in the jaws. Not only do you use pliers to grab things, but also to rotate them. If the object...
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Waiting for answer Why does hot water freeze faster than cold water?
Its known as the Mpemba effect, and there are various theories to explain it. It is currently believed that water molecules exhibit intermolecular repulsion causing stretching in the...
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Waiting for answer What is a nucleic acid monomer and polymer?
The monomeric unit of are nucleotides. Nucleic acids are the polymer. Nucleic acids are one of the macromolecules of life. Examples include ribonucleic acid (RNA) and deoxyribonucle...
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Waiting for answer How would you add two vectors that aren't perpendicular or p...
Vector addition is very simple. In order to add vectors we draw them headtotail. The resulting vector is the vector that connects the tail of the first vector to the head of the second, like here: In order to figure out the magnitude of the resulting vector, you can either just measure it with...
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Waiting for answer The order of magnitude of the mass of Earth's atmosphere is...
##10^21## In general ##color(white)("XXX")b^pxxb^q =b^(p+q)## Therefore ##color(white)("XXX")10^18 xx 10^3 = 10^(18+3) = 10^21##
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Waiting for answer What was the Holy Alliance and the Concert of Europe?
Holy Alliance is led by Russia and it consist of Russia,Austria and Prussia and Concert of Europe is known as Vienna Congress is formed to redesign the boundaries of Europe after defeat of Napoleon....
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Waiting for answer How to name binary ionic compounds?
the name for binary ##A_mB_n## is "A Bide" or "A (Roman numeral) Bide" All binary ionic compound have a general formula of ##A_mB_n## ##A## is the cation or the metallic ion. ##B...
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Waiting for answer The sum of three consecutive odd numbers is 111. What is the...
The smallest of the three numbers is ##35##. Consecutive odd numbers increase (or decrease) by an amount of ##2##. For example, observe ##1##, ##3##, and ##5##. To get from one to...
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Waiting for answer A Big Burger has 1/4 pound of meat and a superburger has 1/3...
The superburger contains ##1/12## pound more meat than the Big Burger. We represent the extra meat in the superburger by ##x##. The equation will be: ##x=1/31/4## Multiply all fac...
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Waiting for answer What is the difference between a cation and an anion?
An anion is an atom or group of atoms that has negative charge associated with it. Common examples of anions include F, OH, and ##SO_4^(2)##. This is in contrast to cations, which are atoms or groups of atoms that have positive charge. Together with anions, cations form . OK.
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Waiting for answer How can I draw the Lewis structure for ClO2?
Here's how I would do it. You can find the procedure . For ##"ClO"_2^"", "Cl"## is the less electronegative atom. So, ##"Cl"## is the central atom The skeleton structure is ##"O...
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Waiting for answer What is the difference between a coefﬁcient and a subscript?
A coefficient is the number being multiplied by the variable, and the subscript is used to identify different variables. Coefficient example: Let's say we have the equation ##3x+2y#...
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