Homework answers and tutorials

Waiting for answer What is the volume of a sphere with a diameter of ##28 cm##?
If the diameter is 28 cm, then the radius is half that so radius is 14 cm. From there, we can just use the volume of a sphere formula, which is ##4/(3) pi r^3## We can just plug in for r and get ##4/3 pi (14)^3## Plug in and the answer is 11494.04 cm cubed
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Waiting for answer Are adjectives with the prefix "non" considered compound adj...
I'd say yes. A compound adjective is comprised of more than one word, usually hyphenated. Examples: wellbehaved fourfoot alltoocommon See grammarmonster for more examples. Ho...
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Waiting for answer What is the difference between solving absolute value equati...
The difference between the two is the symbols used. In absolute value equations you use an equal sign to show that the two sides are equal. (Ex. 10x+7 = 37) In absolute value inequalities you use a greater than or less than sign to show that one side is greater than or less than the other side. (Ex...
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Waiting for answer What is system international unit of atomic radius ?
As far as I know, the picometer is currently being used as the SI unit for atomic radii. A picometer is equal to ##10^(12)"m"##. The more traditional unit used was the angstrom , for which you have ##"1 angstrom" = 10^(10)"m"## Keep in mind, however, that angstroms are not SI units. You'l...
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Waiting for answer What is torque?
is the rotational analogue of force. It is the equivalent of force which makes a body rotate about some axis. As you may see, it's the equivalent of force which makes the nut rotat...
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Waiting for answer Why is horizontal velocity constant in projectile motion?
Horizontal velocity in remains constant because we neglect air resistance (aka drag) so there are no horizontal forces acting on the projectile, only the vertical force of the projectile's weight. It is important to remember the definition of a projectile. It is an object that falls under the in...
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Waiting for answer What is the formula of ammonium carbonate?
##("NH"_4)_2"CO"_3## The important thing to recognize here is the fact that you're dealing with two , one which acts as cation and one which acts as anion . The name of the catio...
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Waiting for answer What is the molar mass of magnesium nitride, ##"Mg"_3"N"_2##...
##"100.95 g mol"^(1)## The idea here is that you need to use the chemical formula for magnesium nitride, ##"Mg"_3"N"_2##, to calculate the mass of one mole of the compound, i.e. it...
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Waiting for answer How do you use the epsilon delta definition to prove that th...
Please see below. The preliminary analysis is a bit long. If you just want to read the proof, scroll down. Preliminary analysis We want to show that ##lim_(xrarr2)(x^27x+3) = 7...
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Waiting for answer Butane , octane and hexane in order of increasing boiling po...
boiling point increases with increase in the length of carbon chain. when the chain length increases the attractive force between the molecules(vanderwaal's force) increases and so m...
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Waiting for answer How can I calculate the empirical formula of butane?
It depends on the information you have. The empirical formula tells us the simplest wholenumber ratio of the different types of atoms in a compound. FROM THE MOLECULAR FORMULA If you know that the molecular formula of butane is C₄H₁₀, then you divide the subscripts by their highest common fact...
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Waiting for answer How do you find the area of the trapezoid below?
##190## The quick way of finding the area of this trapezoid would be to simply use the know formula, which looks like this ##color(blue)(A = (B + b)/2 * h)" "##, where ##B##, ##b...
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Waiting for answer What was the intent of Lenin's New Economic Policy (NEP)?
improvement of the economy and the Kronstadt rising One of Lenin's motives for the NEP in 1921 was to improve the economy after the the Tsar WW1 had negatively affected production...
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Waiting for answer A right circular cylinder with a radius of 2.3cm and a heigh...
I found a) in ##m^2## The surface area of your cylinder is given by the contribution of 3 parts: 2 circular (top and bottom) and a rectangular (side): in total: ##A=2*(pir^2)+2pir*h#...
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Waiting for answer Ksp=2.4x105 for calcium sulfate What is the molar solubilit...
Molar solubility: ##4.9 * 10^(3)"M"## Calcium sulfate, ##"CaSO"_4##, will not dissociate completely in aqueous solution to form calcium cations, ##"Ca"^(2+)##, and sulfate anions, #...
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Waiting for answer What is the definition of a tense? How many tenses are there...
Tense shows the time when an action or condition occurred. Tense may also provide emphasis and may determine whether or not an action or condition was continuous or repetitive. Ther...
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Waiting for answer Sulfur forms two chlorides ##"S"_2"Cl"_2## and ##"SCl"_2##.T...
##"32 g"## A substance's equivalent mass actually depends on the reaction in which said substance is involved. See this Wikipedia article for more details on how equivalent mass...
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Waiting for answer What are the roles of animal cell organelles?
enlist every structure in the cell and understand its function separtely. 1) : selectively permeable,allows some particles to pass and stops other. does not give a definite shape ! 2)cytoplasm: its a floating medium 3) mitochondria : involved in ATP production 4) ribosomes : protein factories 5) en...
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Waiting for answer If the area of a square is 225 cm2, what is perimeter?
The area of square is ##A=a^2## where a the length of a side.Hence ##A=225= a^2=225= a=15## Hence the perimeter is ##4*a=4*15=60##
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