Homework answers and tutorials

Waiting for answer How do we represent the magnitude of a vector in physics?
The magnitude of a vector can be represented visually as the length of an arrow, or you can show its magnitude as a scalar with units. Quantities in physics are used to represent realworld measurements, and therefore physicists use these quantities as tools to better understand the world. In exam...
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Waiting for answer Why is a 90% confidence interval narrower than a 95% confide...
See the explanation below. The answer is with particular reference to the Normal distribution. A test procedure starts with fixing the level of significance at 5% or 10% or 1% and...
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Waiting for answer 300 mL of 0.50 M HClO + 400 mL of 0.50m NaClO. How do I setu...
There is no net ionic reaction between ##"HClO"## and ##"ClO"^##. This ##color(red)("is")## your buffer solution. The buffer components are the weak acid ##"HClO"## and its conj...
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Waiting for answer How do you convert 3.2 tons to pounds?
##7169^("lb")## Using imperial measurement (UK) we have ##2240^("lb") = 1" ton"## Write 3.2 as ##3+2/10## so we have ##(3xx2240)+(2/10xx2240)## ##6720+448=7169^("lb")##
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Waiting for answer How many composite numbers are between 1 and 50?
Total 37 composite numbers. Between ##1## and ##50##, we have following numbers as composite. ##{4, 6, 8, 9, 10, 12, 14, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 34, 35, 36,...
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Waiting for answer Silicon tetrachloride (##SiCl_4##) can be prepared by heatin...
demands at least ##1.14## ##mol## of ##Cl_2## gas. The stoichiometric equation, which you have correctly written, clearly and explicitly shows that ##1## ##mol## of silicon (appro...
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Waiting for answer How is naming a polyatomic ion different from naming a binar...
It's not really that much different. You name the positive ion first, then name the polyatomic ion second. Here is a quick review of naming a binary ionic compound. Here is a video which discusses how to name ternary . Video from: Noel Pauller Naming binary molecular is an entirely diff...
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Waiting for answer What does "establish credibility" mean in a research paper?
to establish credibility is to refer to established known facts as they relate to the subject of the research. Opinions and guesswork are open to doubt by the reader of the paper, th...
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Waiting for answer How much is 23kg in pounds?
##"23 kg=51 lb"## ##"1 kg=2.205 lb"## ##23cancel"kg"xx(2.205"lb")/(1cancel"kg")="51 lb"##
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Waiting for answer What is the difference between future perfect continuous and...
The word been is in perfect continuous and not future perfect tense. This is the first step in deciding the tense present. Future perfect have a structure as will + have + verb e...
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Waiting for answer What is 1 divided by 0?
See description Let us assume for the sake of argument that there exist two real numbers ‘a’ and ‘b’ such that: a/0 = b, a ≠ 0. = a = 0.b = a = 0 for any real number b, which is a...
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Waiting for answer Chlorine consist of two isotopes one is cl35 which has the...
##~=35.44## In cases like this, we use the weighted arithmetic mean: ##barX~=(34.97*75.77%+36.96*24.20%)/(100%)## ##barX~=(2649.6769%+894.4320%)/(100%)## ##barX~=(3544.1089%)/(100...
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Waiting for answer Can average rate of change be negative?
Yes, the can be negative. The average rate of change is just the slope of a line. If that line is decreasing then the slope is negative . If that line is increasing then the slope is positive . If that line is constant then the slope is 0 .
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Waiting for answer Using the reaction 2Na(s)+Cl2> 2NaCl(s), determine the...
According to the reaction equation, 2 moles of Na requires 1 mole of Cl2 to produce 2 moles of NaCl. So we start by converting these moles to grams. Ma of Na is 23g/moles, and Ma for Cl2 is 71g/moles. 2 moles of Na equals to ##2*23=46##grams, and 1 mole Cl2 is 71 grams. Here we see that Na needs mor...
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Waiting for answer What is smog and how can it negatively affect human life?
Smog is a type of air pollutant. The word "smog" was coined in the early 20th century as a portmanteau of the words smoke and fog to refer to smoky fog. The word was then intended t...
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Waiting for answer What is amphetamine delusional disorder?
I believe you're talking about Stimulant Psychosis, as I'm quite certain "Amphetamine Delusional Disorder" would be just that, feel free to correct me but I'll do my best. Stimulant...
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Waiting for answer What is an example of a heterogeneous mixture?
sand and water mixture is a heterogeneous mixture A heterogeneous mixture is made of different substances that remain physically separate. Heterogeneous always have more than one ph...
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Waiting for answer Two complementary angles are in the ratio of 4:5. What is th...
40 degrees Since the two angles are compliments, they must add up to 90. Call the angles ##x## and ##y## Then, ##x+ y = 90## Since the angles are in ratio 4:5 we know that ##x = 4t...
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Waiting for answer What is Hund's Rule?
sometimes refered to as the"empty bus seat rule" because when people get on a bus, they always sit by themselves unless all of the seats already have one person in all of them....then they are forced to pair up. Same with electrons. They inhabit empty orbitals, for example, there are 3 different p...
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Waiting for answer How do you verify ##sinx/(1cosx) + (1cosx)/sinx = 2cscx##?
##sinx/(1cosx)+(1cosx)/sinx = 2cscx## ##sinx/(1cosx)+(1cosx)/sinx = [sin^2x+(1cosx)^2]/[(1cosx)sinx]## ## = [sin^2x+cos^2x+12cosx]/[(1cosx)sinx]## ## = [1+12cosx]/[(1cosx...
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