Homework answers and tutorials

Waiting for answer Why was Thomas Jefferson chosen to write the Declaration of...
Because he was the best writer on the committee. Among those on the committee to write a draft of the Declaration were Benjamin Franklin , John Adams , and Thomas Jefferson . It was...
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Waiting for answer What are covalent bonds?
The chemical bonds which are formed by sharing between two or more nonmetals only are called covalent bonds. Covalent bonds can be divided into three types based on how many pairs of electrons are being shared between the atoms  SINGLE COVALENT BOND  The covalent bonds in which only 1 pair of...
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Waiting for answer What is the process of axonal conduction?
Positive ions are pumped in and out of the axon, further up each time, to create a temporary attraction and draw the action potential along. Information is conducted through the axo...
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Waiting for answer Approximately how many marbles could fit into a hollow spher...
##"Of the order of "10^28## marbles of ##1mm## diameter. We know that marble is a small spherical toy. These come in various size. Most commonly, these are about ##1 cm## in diameter...
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Waiting for answer What is the difference between a Tangent line and a secant l...
The to a curve at a given point is a straight line that just "touches" the curve at that point. So if the function is f(x) and if the tangent "touches" its curve at x=c, then the tangent will pass through the point (c,f(c)). The slope of this tangent line is f'(c) ( the derivative of the functio...
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Waiting for answer What does the zero factor property mean?
We start by defining the ZeroProduct Property Zero  Product Property states that if the product of two or more factors is zero, then at least one of the factors must be zero. That is, if XY = 0, then X = 0 or Y = 0 or both X and Y are 0. Similarly, if XYZ = 0, then X = 0 or Y = 0 or Z = 0 or al...
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Waiting for answer How does BronstedLowry define acids and bases?
A BrønstedLowry acid is any substance (molecule or ion) that can donate a hydrogen ion (##H^(+)##). A BrønstedLowry base is any species that can accept a hydrogen ion (##H^(+)##)....
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Waiting for answer What purpose did the gulags serve in Russia?
The Gulags, apart for their basic finality of reclusion sites and forced labour reservoirs, had an innovative (even if somehow tragical) component of reeducational purpose. The main...
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Waiting for answer What is electron affinity?
Electron affinity is the amount of released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion. To learn more about electron affinity check out the following link: http://chemblogc.blogspot.com/2014/04/electronfirstelectronaffinityneede...
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Waiting for answer A steel wire in a piano has a length of 0.7 m and a mass of...
##T=823.9"N"## For the fundamental frequency: ##f=(1)/(2L)sqrt((T)/(m))## ##L## = length ##T## = tension ##m## = mass per unit length. ##sqrt((T)/(m))=2Lf## ##T/m=4L^2f^2## ##...
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Waiting for answer The tallest man ever recorded was Robert Wadlow, who was 272...
247.52 centimeters. To find this answer, you have to find 91% of Robert Wadlow's height. To do that, you multiply 272 by 0.91, which gives you the height of Zeng Jinlian.
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Waiting for answer There are approximately 7.5 gallons of water in 1 cubic foot...
##54,286.88## gallon Volume of a sphere is given by ##4/3pir^3##, where ##pi=3.1416##. Hence spherical water tank will hold ##4/3xx3.1416xx(24/2)^3=4/3xx3.1416xx12xx12xx12## or #...
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Waiting for answer What medium does sound travel through best?
Scientifically, this is a very difficult question to answer. The reason is simply that the word "best" is difficult to interpret. In science, understanding the question is often as important as the answer. You might be asking about the speed of sound. You might be asking about loss of sound (e....
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Waiting for answer Consider the reaction: K2S(aq)+Co(NO3)2(aq)→ 2KNO3(aq)+CoS(s...
##"73 mL"## Your strategy here will be to write the balanced chemical equation for this examine the that exists between the two reactants use the and volume of the coba...
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Waiting for answer Magnesium reacts with nitrogen to form magnesium nitride. Th...
The formula for magnesium nitride is ##Mg_3N_2##. As do many active metals, magnesium nitride can be formed by heating the metal (fiercely!) under dinitrogen gas: ##3Mg + N_2 rarr M...
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Waiting for answer How do you solve a percent change equation?
You have to use this formula: %change = ((new amount  original amount) / original amount) x 100 For example, if you originally had an investment of $300 and 5 years later you had $326.25 in your account and you want to see the percent change, you'd use the formula above % change=((326.25300)/300...
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Waiting for answer What is the difference between a ligament, tendon, and carti...
Ligament is a connective tissue which connects bone to bone. Tendon connects Bones to muscles. Cartilage is a type of connective tissue which is involved in supportive framework of our body , cartilage are of various types like Hyaline cartilage which is weakest , Elastic cartilage which is elastic...
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Waiting for answer Omar bought 10 pounds of rice for $6. How many dollars did h...
##0.6 $## we have : 10 pounds of rice ## 6$## 1 pound of rice ## x$## we need to find ##x## ##x/1 = 6/10  x = (6xx1)/10 = 3/5 = 0.6## I hope that was clear
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Waiting for answer Is ##4x^2 + 28x + 49## a perfect square trinomial and how do...
Yes it is. ##4x^2+28x+49 = (2x+7)^2## All perfect square trinomials are of the form: ##a^2+2ab+b^2 = (a+b)^2## In this case ##a = 2x## and ##b=7## ... ##4x^2+28x+49## ##=(2x)^...
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Waiting for answer What is the average kinetic energy of the molecules in a gas...
The average kinetic energy of the molecules is 5.66 × 10⁻²¹ J. According to Kinetic Molecular Theory, the average kinetic energy of gas molecules is a function only of temperature. The formula is ##KE = 3/2kT## where ##T## is the Kelvin temperature and ##k## is Boltzmann's constant. ##KE = 3/2...
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