Homework answers and tutorials

Waiting for answer What is an inelastic collision?
A collision between objects that permanently changes the objects' shape and/or generates heat. In brief: A collision between objects that permanently changes the objects' shape a...
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Waiting for answer What are some examples of organisms in the phylum nematoda?
Toxocara canis  the one that puppies are "wormed" to remove and that can cause blindness in children if they come into contact with animal faeces and are infected. Vinegar eels  tiny free living worms that can live in vinegar or liquids that can become vinegary such as cider, wine, beer etc. Caeno...
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Waiting for answer What is active immunity and passive immunity?
Active immunity involves antibody production by your B lymphocytes, passive immunity involves administration of antibodies. Now before we proceed, let us define some terms Let us...
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Waiting for answer What is Biome and what it's benefits and how kinds of biomes...
A biome is a large community of animals and plants in a distinct climate or region. The main biomes we have are tundra, forest, desert, and grassland.
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Waiting for answer How do you simplify ##sqrt(120/121)##?
##sqrt((120)/(121))## = ##sqrt(120)/(sqrt(121))## ##sqrt(121) = 11 ## ##sqrt(120)## = ##2sqrt(30)## therefore, ##sqrt((120)/(121))## = ##(2sqrt(30))/(11)##
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Waiting for answer Why does ##HBr## have a higher boiling point than ##HCl##?
As a physical scientist, you really should quote these boiling points, these physical data. ##HBr## is a larger, more polarizable molecule than ##HCl##. There should be a greater...
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Waiting for answer What is the function of ribosomal RNA?
Ribosomal RNA (rRNA) is responsible for the translation of mRNA to protein. The mRNA strand is transcribed from a section of DNA, and then translated by the ribosome complex. Ribos...
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Waiting for answer In a dielsAlder reaction with cyclopentadiene and maleic an...
You should notice that both of them have three double bonds. It is very possible that cyclopentadiene can dimerize. And although it may seem tempting to believe that maleic anhydride can do that too, it is in an strans conformation, which isn't favorable in the DielsAlder reaction, so I would on...
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Waiting for answer How do you show that the derivative of an odd function is ev...
I think you could do it like this: Let f(x) be the odd function we're gonna work with. So, f(x) = f(x), By the definition of the derivative: f'(x) = ##lim_(h 0)(f(x+h)  f(x))/h##. We want to prove that f'(x) = f'(x). Now, f'(x) is: ##f'(x) = lim_(h 0)(f(x+h)f(x))/h## . Since f(x) is...
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Waiting for answer What is the difference between a conjunction and a prepositi...
A conjunction is a word used to connect clauses or sentences or to coordinate words in the same clause. A preposition usually describes the position of something. A conjunction 's...
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Waiting for answer How does adding salt affect the surface tension of water? If...
Yes, adding salt to water does increase the surface tension of water, although not by any significant amount. It is a very common misconception that salt is a surfactant , i.e. a compound that either lowers or breaks surface tension. However, experiments done with salt water show that surface tens...
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Waiting for answer How do I use zero factor property in reverse?
You use it to determine the polynomial function. We can use it for higher degree polynomials, but let's use a cubic as an example. Suppose we have the : 3, 2.5, and 4. So: ##x=3## ##x+3=0## ##x=2.5## ##x=5/2## ##2x=5## multiply both sides by denominator ##2x5=0## ##x=4## ##x4=0## So, t...
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Waiting for answer How do you find all unit vectors orthogonal to v=i+j+k?
A generalised unit vector is: ##mathbf u = 1/(sqrt( 2 (alpha_2 ^2 + alpha_3 ^2 + alpha_2 alpha_3)))(( alpha_2  alpha_3),(\alpha_2),(alpha_3))## There are an infinite number of vec...
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Waiting for answer Mole Concept... The number of i] molecules [S=32]...
Number of atoms: ##3.61 * 10^(24)## Number of molecules: ##4.51 * 10^(23)## The question wants you to determine how many molecules and how many atoms of sulfur you get in ##"192 g"#...
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Waiting for answer Why are there so many hyphens and apostrophes in French? Wha...
In French indicate (as in most other languages) the disappearance of a letter (it's = it is) , on the other hand, often have a euphonic raison d'être (which is typically French). I...
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Waiting for answer A copper atom with 34 neutrons. What is the atomic symbol? E...
The copper nucleus contains ##29## protons, so we have ##""^63Cu##. The superscript is the sum of protons and neutrons, massive nuclear particles with a positive or a neutral charge....
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Waiting for answer Explain why weight and mass are used as synonyms on earth, b...
In scientific circles, Mass and weight are ACTUALLY NOT synonymous, and it is a misconception if people use them like that. Mass is a measure of the amount of matter, and measured in kilograms. Weight on the hand, is the amount of force exerted by the Earths gravity on an object of finite mass. If...
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Waiting for answer Convert 2.12 gallons to milliliters if 946 mL = 1 qt.?
You need to use two conversion factors, one to get you from gallons to quarts, and the other to get you from quarts to mililiters. Since 1 gallon is equivalent to 4 quarts (for US units), you'll get ##2.12cancel("gallons") * (4cancel("quarts"))/(1cancel("gallon")) * "946 mL"/(1cancel("quart"))...
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Waiting for answer How many molecules of acetylCoA, NADH, and FADH2 are produc...
The βoxidation of an 18carbon acid produces ##"9 mol of AcetylCoA, 8 mol of NADH, and 8 mol of FADH"_2##. The βoxidation pathway for a saturated fatty acid is a fourstep cycle...
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