Homework answers and tutorials

Waiting for answer Why is amide protonated on oxygen rather then in nitrogen ??
Consider structures, ##RC(=O)NH(R)## versus ##RC(O^)=N^+HR## The second structure is the amide equivalent of an enolate anion. Evidently, more electron is concentrated on the ox...
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Waiting for answer Why do your ears ''pop'' as you drive up a mountain?
Your ears "pop" as you drive up a mountain because the decreases as the altitude increases. Your middle ear (behind the eardrum) is connected to the inside of your throat by your E...
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Waiting for answer At the Holiday Valley Ski Resort, skis cost $16 to rent and...
There were ##18## skiers and ##10## snowborders. Assume, there were ##X## skis and ##Y## snowboards rented. Since there were ##28## people who rented equipment, we have the first equ...
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Waiting for answer What is an asteroid? Where are most located?
When our star Sun was young, small countless planetesimals orbiting coalesced, conjoined and aggregated to form bigger planetoids, larger midget planets and very large planets.. Smaller starfish like rocky planetoids are called asteroids Most of the known asteroids are orbiting the Sun, in...
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Waiting for answer Novocaine, which is used by dentists as local anaesthetic, i...
##(["B"])/(["BH"^(+)]) = 0.0281## There are two ways in which you can approach this problem, one using the base dissociation constant and the solution's ##pOH##, and the other one us...
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Waiting for answer What are the characteristics of life?
RINGER. To remember the charactristics of life, scientists use a word "RINGER". If a thing has all the properties mentioned in "RINGER" than the thing is considered as living. Me and...
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Waiting for answer What is the standard form of the equation of a circle with c...
Equation of circle is ##x^2+y^2+6x6y+14=0## and ##y=1## is tangent at ##(3,1)## The equation of a circle with center ##(3,3)## with radius ##r## is ##(x+3)^2+(y3)^2=r^2## or ##...
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Waiting for answer What are the factors of 23? Is 23 prime or composite?
##23## has only 2 factors  it is prime. A prime number can be defined as: "A natural number which has only 2 factors  itself and 1". 23 has only 2 factors:##" "23 = 1 xx23## T...
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Waiting for answer What are the differences between cilia and pili?
main difference is in the function pili are special extension of bacterial cell which are made for conjugation in bacterial cell, whereas cilia do not perform this function. cilia a...
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Waiting for answer What does the weak force do?
The weak force mediates radioactive decay. The weak W bosons mediate the conversion of a proton into a neutron or vice versa. A neutron consists of an up quark and two down quarks. A...
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Waiting for answer Why is a rhombus not necessarily a regular polygon?
A regular polygon needs all sides and all angles to be equal, whereas a rhombus only needs all sides to be equal. A rhombus is a 4sided polygon in which all sides are of equal lengt...
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Waiting for answer How many miles are covered in a 20 kilometer race?
Approximately ##12.4## ##1## mile is exactly ##1.609344## kilometers. So ##20## kilometers is ##20/1.609344 ~~ 12.4## miles. ##color(white)()##Bonus Approximate mile ##harr## kil...
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Waiting for answer How do you find the greatest common factor of 54, 27?
##27## When you're looking for the GCF try to find common numbers between your factors. ##54## and ##27## happen to have a common factor of ##27##, as ##27## divides ##54##. Leavi...
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Waiting for answer Why is the reactivity series of metals important?
The activity series is important because if you are dealing with equations, it shows whether a reaction works or not For example if you have a single replacement equation and the bas...
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Waiting for answer What is the electron configuration for a phosphorous anion w...
##"P"^(2): ["Ne"] 3s^2 3p^5## Your starting point here will be the of a neutral phosphorus atom. Phosphorus, ##"P"##, is located in period 3, group 15 of the , and has an equal...
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Waiting for answer How do you graph ##y=2x+1## using a table?
See the explanation. ##y=2x+1## Since this is the intercept equation for a straight line, the table only needs two points. However, I'm going to determine ##4## points (ordered pai...
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Waiting for answer How can opportunity cost be zero?
When a consumer has indifference preference. Opportunity cost can be defined as cost forgone for one unit of a commodity during the purchase of one unit of another commodity. Suppos...
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Waiting for answer How can the distance formula be derived from the pythagorean...
We start by placing a right triangle in the coordinate plane as seen below. Notice that we have given the vertices arbitrary x and ycoordinates. Notice that, although the coordinates are arbitrary, the ycoordinates of the vertices on the horizontal leg are the same since they will have the sam...
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Waiting for answer What was a result of the Battle of Coral Sea?
Tactically was a Japanese victory (more tonnage sunk) but strategically the American fleet stopped the Japanese advance in that theater of war (invasion of Port Moresby). The battle...
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Waiting for answer Why it is important that many identical plasma cells are pro...
Many identical plasma cells can secrete a particular type of antibody in adequate amount to fight a disease causing microbe. . Mature B lymphocytes are able to produce antibodies,...
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