Homework answers and tutorials

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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Waiting for answer How many atoms are in 22 grams of copper metal??
##22"g Cu"## contains ##2.1 xx 10^23## atoms of Cu. In order to solve this problem, you need to determine the molar mass of copper, which is the mass of one mole of copper. The molar...
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Waiting for answer What kind of star is the sun and what is the composition of...
Sun is a main sequence star G2 v type spectrum, main elements Hydrogen 73.4% Helium 24.8 Oxygen 0.7% Carbon 0.29%
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Waiting for answer What characteristic of a metallic bond explains some of the...
In , the are free to move throughout the metal structure. This accounts for many of the properties of metals. Electrical and thermal conductivity The mobile electrons can act as charge carriers in the conduction of electricity and as energy carriers in the conduction of heat. Malleability an...
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Waiting for answer What is an example of an energy transformation from electric...
How about a Microphone!
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Waiting for answer What's the difference between a control, constant, dependent...
Controlled variable ##rArr## have nothing done to it. Constant variable ##rArr## kept the same Dependent variable ##rArr## you observed/measured Independent variable ##rArr## changed...
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Waiting for answer How far is Pluto from the sun in km?
Pluto's average distance from is 5.9 billion km. Pluto orbits the Sun at an average distance of 5.87 billion km. Pluto has an orbit that is very elliptical, with a big difference be...
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Waiting for answer How is allocative efficiency achieved in pure competition?
The assumptions of perfect competition (among both sellers and buyers) lead to an equilibrium price and quantity that cannot be improved in terms of allocating resources. I have crea...
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Waiting for answer How many significant digits are in ##50.00##?
50.00 (4 significant figures) there are 4 in ##50.00##. The zeros in this number are trailing zeros in a number that has a decimal point. There are 3 types of zeros: Leading zero...
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Waiting for answer How do you find the 6 trigonometric functions for 225 degree...
Find 6 trig functions of 225 deg ##sin 225 = sin (45 + 180) =  sin 45 = sqrt2/2## ##cos 225 = cos (45 + 180) =  cos 45 = sqrt2/2## ##tan 225 = sin 225/cos 225 = 1## ##cot 225 = 1...
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