Homework answers and tutorials

Waiting for answer How can potential energy be increased and decreased?
By changing the object's position. There are several forms of potential . 1) An object with mass will have potential energy by placing it in a gravitational field (like the gravita...
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Waiting for answer How many galaxies are there in the universe?
10^11 it is believed that there are about 10^11 galaxies in the universe containing 10^11 stars (in each galaxy). But that's really an estimate of number of galaxies and stars they m...
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Waiting for answer What is the difference between simple and compound machines?
can not be broken down into smaller or simpler machines/parts. A compound machines is a machine made up of simple machines Compound machines are by definition a compounding or addin...
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Waiting for answer How do you find (f o g)(x) and its domain, (g o f)(x) and it...
Given ##color(white)("XXX")f(color(blue)(x))=color(blue)(x)^21## and ##color(white)("XXX")g(color(red)(x))=color(red)(x)+1## Note that ##(f@g)(x)## can be written ##f(g(x))## and that ##(g@f)(x)## can be written ##g(f(x))## ##(f@g)(x) = f(color(blue)(g(x))) = color(blue)(g(x))^21## ##color(whit...
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Waiting for answer An irregularly shaped stone was lowered into a gradulated cy...
The of the stone is ##"5.0 g/cm"^3##. The volume of the stone is the difference between the second volume of the water and the first volume. ##"Volume"_"stone"="7.0 mL""2.0 mL=5.0...
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Waiting for answer What is the structure and function of the cytoskeleton in a...
is the name given to the skeleton of the cell. The cytoskeleton gives a cell it's shape and holds it together(and the organelles in it), just like the skeleton in your body holds you in shape. Without it, you would just be a pile of mush; so would be the cell. Unlike the illustrations in many textb...
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Waiting for answer What is a polynomial function for 5, i, i?
##f(x)=x^35x^2+x5## I have assumed that ##{5,i,i}## are intended to be the of the function. In this case, the function can be factored as: ##color(white)("XXX")(x5)((xi)(x+i)#...
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Waiting for answer What are the customary units of solubility on solubility cur...
The customary units are g/100g In this example the solvent is water.
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Waiting for answer How did the trial of John Peter Zenger become important to t...
It established the precedent for freedom of the press in the colonies. Under British law, a publication could be sued for defamation even if what was published was true. In the Unit...
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Waiting for answer What is the meaning of constant of proportionality in physic...
Constant of proportionality basically comes from mathematics. In Physics and other branches of Science or Subjects it is applied and used to describe variables. If change in one variable is always accompanied by a change in another variable, and if the changes between the two are always related by...
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Waiting for answer How can an object have a negative acceleration while speedin...
The sign before merely denotes direction, it has no relation whether the object is speeding or slowing. A common misconception is that negative acceleration means the body is slowing, which is ##false##....
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Waiting for answer What are some examples of an elastic collision?
There are none. An elastic collision is one where there is perfect transfer between the things that are colliding, and this just doesn't happen in the real world. This said, it is sometimes convenient to pretend as if realworld collisions are elastic either to illustrate a point or to simplify t...
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Waiting for answer Does charging by induction or conduction occur during a thun...
(1) During a storm, charged cloud approaches a building or a house. (2) Charges are induced(that is, the electrons from the neutral house are attracted to the roof and so, the roof becomes charged. (3) The proof is that some houses get thunder stricken
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Waiting for answer What is the hybridization of ##CH3^##?
First you should draw lewis structure of ##CH_3^## Then to find hybridization of central atom/ hybridization of ##CH3^−##,Count the electron regions around central atom In ##CH_3^## there are 04 electron regions . (Note: Electron regions are pair of electron, a single bond, a double b...
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Waiting for answer What is the exact value of sin 60 degrees?
##sqrt(3)/2## By using special triangles and the definition of the sine function (as opposite/hypotenuse in a standard right angled triangle) we arrive at the solution. I will upl...
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Waiting for answer Are SN1 reactions faster than SN2?
There are cases for this answer..!! SN1 will be faster if: 1.Reagent is weak base. 2.C connected to the Leaving Group is tertiary (sometimes...
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Waiting for answer Which lengths represent the lengths of the sides of a scalen...
##3,4,5" "## A scalene triangle by definition has three unequal sides. ##4,4,5 and 12,7, 7## are isosceles triangles because they have two equal sides . ##15,15,15 " "##is an...
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Waiting for answer How do you find the integral of ##x^3 * sin( x^2 ) dx##?
##I=1/2(x^2cosx^2+sinx^2)+C## ##x^2=t = 2xdx=dt, x^3dx=1/2x^2 2xdx = 1/2tdt## ##int x^3 sinx^2 dx = 1/2 int tsintdt = I## ##u=t = du=dt## ##dv=sintdt = v=int sintdt= cost##...
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Waiting for answer How do you simplify Square root of 63  Square root of 28?
##sqrt (7)## ##sqrt (63)##  ##sqrt (28)## the factors of 63 are 7 and 9. 9 is a perfect square so therefore ##sqrt (63)## is ##3sqrt (7)## the factors of 28 are 7 and 4. 4...
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