Homework answers and tutorials

Waiting for answer How do you graph the secant, cosecant, and cotangent functio...
I am assuming that you are using a graphing calculator. To graph ##sec x##, type in ##1/(cos x)## and graph. graph{1/(cos x) [6.28, 6.28, 5, 5]} Please note that the xaxis is in radians (I switched it to ##[2 pi, 2 pi])##. I would suggest using Zoom Trig (ZTrig) in the Zoom menu. To graph...
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Waiting for answer What is telophase ii?
The last stage in the second meiotic division of which follows anaphase II. During telophase II, the chromosomes reach opposite poles, cytokinesis occurs, the two cells produced by meiosis I divide to form four haploid daughter cells, and nuclear envelopes (white in the diagram) form. When the two...
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Waiting for answer A beaker containing water is placed on a spring scale and re...
The reading will go up by an amount equivalent to the weight of water displaced by the stone. Archimedes principle states that a body immersed in a fluid experiences an upward force equal to the weight of fluid displaced (that is the weight of fluid of the same volume as the object). then states t...
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Waiting for answer How do you graph ##y=sqrt(x3)##?
Look below! Normally, for graphing linear equations, I'd state to equate both parameters to ##0##, but this here isn't a linear equation, so let's do it a bit differently. The given...
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Waiting for answer Predict the relative atomic radii of the three magnesium iso...
the atomic radii will be the same for all All isotopes have the same number of protones , same number number of electrons , and hence since the atomic radii is a chemical property t...
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Waiting for answer What is the mode for the sample 3, 2, 5, 7, 3, 2, 6, 4, 3, 7...
3 The mode is the number that appears most often in the set. It is often easier to see these measures of central tendency by rewriting the set in order. Here: 1, 2, 2, 2, 2, 3, 3,...
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Waiting for answer How are strong nuclear force and weak nuclear force alike?
Both only act over a finite range within the nucleus of an atom. Of the four natural forces, strong nuclear, weak nuclear, electromagnetic and gravity, only two have a finite range....
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Waiting for answer How does human population growth affect the extinction of ot...
Human population numbers have increased on earth at an alarming rate, and it is our actions on the planet that affect the in the world around us. Most notably, we are responsible for the reduction of the world's biodiversity by 50% as a recent World Wide Fund estimate shows (WWF, 2014). Due to ou...
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Waiting for answer What is the difference between pointslope form and slope in...
Pointslope form is written ##(yy_1)=m(xx_1) ## and slope intercept form is written ##y=mx+b##. m= slope b= yintercept Example: Say you have a point ##(3,2)## and a slope of ##7## and need to write the equation of the line. Answer: Pointslope form: ##(y2)=7(x3)## Slope intercept f...
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Waiting for answer What is the sum of all the oxidation numbers in any compound...
In any compound the sum of the is equal to the charge on the compound. And of course if the compound is neutral, then the sum of the oxidation numbers of is neutral. If the compo...
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Waiting for answer State the difference between a physical change and a chemica...
A chemical change produces a new substance that wasn't there before, but a physical change only changes the form of a substance. If I have a sheet of paper I can tear it up, or put i...
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Waiting for answer Is BBr3 a lewis acid or base?
##BBr_3## is a Lewis Acid The reason it is a Lewis Acid is because it is an electronpair acceptor. A fairly easy way to see this is to draw the Lewis dot structure of the molecule...
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Waiting for answer How do you solve ## ln (x – 2) + ln (x + 2) = ln 5##?
x=3 or x=3 Using the property that says : ## ln(a) +ln(b) = ln(a*b)## We have: ##ln(x2)+ln(x+2) = ln5## ##ln((x2)*(x+2)) = ln5## Rasing exponential both sides we will have: #...
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Waiting for answer How do you prove: ##secx  cosx = sinx tanx##?
If we so desire, we can also modify the righthand side to match the lefthand side. We should write ##sinxtanx## in terms of ##sinx## and ##cosx##, using the identity ##color(red)(tanx=sinx/cosx)##: ##sinxtanx=sinx(sinx/cosx)=sin^2x/cosx## Now, we use the Pythagorean identity, which is ##sin^2...
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Waiting for answer How do you calculate the vapor pressure of ethanol?
You use the ClausiusClapeyron equation. Experiments show that the vapour pressure ##P##, of vaporization, ##ΔH_"vap"##, and temperature ##T## are related by the equation ##lnP = "...
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Waiting for answer Does SO2 have a resonance structure?
Yes, ##SO_2## have structure. First I would like to describe what is resonance structure and then come to your question. ##01.## Draw the lewis structure of ##CO_3^2## When you draw the lewis structure there are some other lewis structures that you can draw.But you draw the lewis structure...
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Waiting for answer How to factor ##4x^4+81##?
##(2x^26x+9)(2x^2+6x+9)## This is how to solve without using a specific theorem: ##4x^4+81## Add ##36x^2## to complete the square and subtract ##36x^2## to equal to zero ##4x^4+3...
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Waiting for answer What are the six functions of bone, and what is hemopoiesis?...
There are probably more than six functions and hematopoiesis is one of them. Support—bones form the framework of the body and contribute to the shape, alignment, and positioning of...
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Waiting for answer How would you define second ionization energy?
It is the energy needed to remove a second electron from each ion in 1 mole of gaseous 1+ ions to give gaseous 2+ ions. The equation for second ionisation energy is: ##M^+rarrM^(2+)+...
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Waiting for answer What is the chemical formula for sugar?
Well, sugar is NOT just one molecule. Sugar is the generalized name for sweet, shortchain, soluble carbohydrates, many of which are used in food. They are carbohydrates, composed of carbon, hydrogen, and oxygen. There are various types of sugar derived from different sources. Simple sugars are ca...
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