Homework answers and tutorials

Waiting for answer Would a density independent limiting factor have more of an...
By definition of density independent, I would say it has an equal affect on large and small ecosystems. I interpret density independent limiting factors to be factors that affects an...
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Waiting for answer What is the area of an equilateral triangle of side length 1...
##A=(s^2sqrt(3))/4## ##A=(256sqrt(3))/4## ##A=64sqrt(3)/4##
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Waiting for answer How do vectors subtract graphically?
Subtracting vectors works the same way as adding vectors, but you end up adding a negative vector! Say I want to subtract vectors A and B. I add to vector A (using head to tail method) to the opposite of vector B; keeping magnitude the same (length) but just turning the vector in the opposite dire...
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Waiting for answer What type of ecosystems do lions live in?
Typically lions live in the grasslands, though they can survive in a variety of habitats. Most African lions live in the south Saharian area. Lions like to live where there are othe...
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Waiting for answer How does the octet rule relate to alkali metals?
Alkali metals have one valence electron so they will want to donate an electron in order to satisfy their octet. The states that when a metal and nonmetal ion wants to form a bond t...
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Waiting for answer How was Alexander Hamilton killed?
Alexander Hamilton was killed in a duel with Aaron Burr. Alexander Hamilton was killed by Aaron Burr because Hamilton endorsed Thomas Jefferson instead of him in the Election of 1800...
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Waiting for answer Using Huygen's principle, explain why diffraction of light c...
According to Huygen's principle ALL light propagation can be regarded as involving . Simply put, the amplitude at some point further forward is the result of interference between waves coming from all points on a previous wave front. If there are no obstacles the front just continues undisturbed,...
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Waiting for answer What SI units are used to measure density?
SI units are used to measure density is ##"kg/m"""^3## . = mass / volume Unit of density = unit of mass / unit of volume Unit of density = kg / ##m^3##
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Waiting for answer What is mechanical advantage and mechanical efficiency??
For a simple machine mechanical advantage (MA) = ##"load"/"effort"## Efficiency =##"Mechanical advantage"/"Velocity ratio"xx100## Mechanical advantage = ##"Load"/"Effort"## So if w...
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Waiting for answer Explain why the square root of 89 must be between 9 and 10?
##9 sqrt(89) 10## We have ##81 = 9^2 89 10^2 = 100## and ##sqrt(x)## is monotonic for ## 0 x infty ## which means that if ##0 x_1 x_2 sqrt(x_1) sqrt(x_2)## then ##...
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Waiting for answer What are neurotransmitters?
they are endogenous chemicals that enable neurotransmission. They are chemicals that enable communication from the brain throughout the body. they are released from one neuron to ano...
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Waiting for answer What does a cell membrane do for animal cells, and what do t...
Semi Permeable membrane is semi permeable , means it will allow only few substances to enter or leave the cell . It contains various Receptors for various enzymes also In , since t...
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Waiting for answer What is the concavity of a linear function?
The concavity of a linear function is zero. Concavity measures the rate at which the slope of a graph increases ("concave up") or decreases ("concave down"). Since the slope of a linear function is constant, it is neither increasing nor decreasing at all, so its concavity is zero! In terms of der...
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Waiting for answer What were the terms of the Convention of 1800?
Agreements that would ensure a peaceful relationship between parties. The Convention of 1800 was to write a treaty between the United States of America and France that would settle t...
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Waiting for answer What are the parts of the tundra ecosystems?
The details will depend on which tundra ecosystem one is referring to, but tundra are characterized by cold temperatures, little precipitation, and no trees. Tundras are found in th...
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Waiting for answer How would you find the percent abundance of 2 isotopes of an...
See explanation. The average of is calculated by: ##Mass_(avrg.)=sum("isotope mass")*("percent abundance")## For example, suppose we want to find the percent abundance of chlorin...
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Waiting for answer How do you calculate molality from molarity?
See explanation. If all you are given is , then you also need to know the of the solution to calculate , m (mol/kg solvent). The easiest way to understand the process is to assu...
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Waiting for answer Benzene is a hydrocarbon, a compound of carbon and hydrogen...
The is ##(CH)_n## and the is ##C_6H_6##. Since we know that a hydrocarbon only contains carbon and hydrogen, we can use the percent of hydrogen given to determine how much carbon the compound contains ##%"carbon" = 100%7.74% = 92.26%## The next step in determining the empirical formula is to d...
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Waiting for answer What is the area of this regular hexagon?
The area is approximately ##86.6 "cm"^2##. As this hexagon is regular, you can divide it into ##6## triangles. Please note that all those triangles are isosceles. All angles of the...
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Waiting for answer When a ball is thrown upwards, what is the relationship betw...
can neither be created or destroyed. It can only be converted from one form to another. Moreover the mechanical energy (sum of its potential and kinetic energy ) remains same. Now let us analyse the problem in steps. When the ball in on the ground its velocity is zero. and its height above the gro...
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