What made the Assyrian army so powerful?
- BUSINESS
How many types of elasticities of demand do we have?
Elasticity of demand refers to sensitivity of demand to price change. Mathematically it is the ratio of % change in quantity demanded to % change in the commodity’s price. There are, generally, 5…
1 educator answer
- BUSINESS
What is the practical importance of the knowledge of price elasticity of demand?
Elasticity of demand is a measure of change in quantity demanded to change in the commodity’s price. An elastic demand is a scenario when small change in price causes significant change in demand….
2 educator answers
- BUSINESS
Explain the motives of developed economies in providing foreign aid.
Developed countries usually have reasons for providing foreign aid. One reason may be to keep a country stable. The foreign aid may help keep a country’s economy strong. When the economy is…
1 educator answer
- BUSINESS
Does marketing help or use consumers?
Marketing does both: it uses consumers and it also helps them. Marketing uses the consumer’s feelings to advertise products and services in a way that appeals to the consumers (or their feelings)….
1 educator answer
- MATH
In order to divide two fractions, we have to multiply the numerator (top of fraction), by the reciprocal of the denominator (bottom of fraction). To do this, let’s look at an example:…
1 educator answer
- MATH
how to write a quotient as a mixed number
So there are several ways of going about writing a fraction as a mixed number. This question asks how to write a quotient as a mixed number. A quotient is the result of dividing one number by…
1 educator answer
- MATH
What is a natural number, their opposites, and 0.
The counting numbers starting from 1 (one) are called natural numbers. Thus we have the set of natural numbers N as N= The dots in the end indicate that the process of counting…
2 educator answers
- SCIENCE
Refraction is what occurs when a light (such as an electromagnetic light wave) enters a new medium (type of matter- such as solid, liquid, or gas) that causes its speed to change. For example, when…
1 educator answer
- SCIENCE
Explain how the Kinetic Theory of Matter supports the changes of state observed in matter.
The KTM can be assumed to be an acronym for the Kinetic Theory of Matter since this question refers to ‘changes observed in matter’. The Kinetic Theory of Matter is “A theory which states that the…
1 educator answer
- SCIENCE
what are the proton pumps found in the thylakoid membrane directly responsible for
The proton pumps embedded in the thylakoid membrane are directly responsible for ATP synthesis. Thylakoid membrane encloses thylakoid in chloroplasts of the plant cell. These are the regions that…
1 educator answer
- SCIENCE
How do you determine the valency of an atom?
In simplest terms, valency is a measure of number of electrons that can be used by an element in the bond formation. The bonds between two elements can be formed by either electron…
1 educator answer
- SCIENCE
Condensation occur when hot air is in contact with cold surface. This means that condensation…
The atmosphere generally contains water vapor. This is what we call humidity. The amount of water vapor that the atmosphere can hold depends on temperature, and decreases as temperature decreases….
1 educator answer
- SCIENCE
Compare the motion of a projectile fired at an angle with the motion of a projectile fired…
Both projectiles are acted on by the same forces: air resistance, gravity, wind, etc. (depending on the situation). But for the purpose of standard projectile motion problems, the main difference…
1 educator answer
- SCIENCE
What are the main parts of the eye?
There are 5 main parts of the eye: Cornea, iris, lens, retina and the optic nerve. Light enters our eye through the cornea, which is the clear, refractive surface of our eye. It is sensitive to…
1 educator answer
- SCIENCE
Why are intermolecular forces considered weaker than intramolecular forces?
Intermolecular forces are forces of attraction or repulsion between different neighboring particles such as molecules, compounds, ions, or atoms (inter = between). Examples of intermolecular forces…
1 educator answer
- SCIENCE
How do you estimate the age of an asteroid fragment on earth?
The age of any asteroid fragment in Earth’s surface can be found by using the radioisotope dating methods. The idea behind this method is relatively simple (although the lab protocols may be rather…
1 educator answer
- SCIENCE
Describe how gravity affected earth’s shape during its formation.
The Earth formed in a similar way to the other planets in our Solar System. The entire System was originally a cloud of gas and dust particles. Eventually this cloud got big enough (and therefore…
1 educator answer
- SCIENCE
What is the difference between an empirical formula and a molecular formula?
Empirical formula gives us the ratio between different atoms in a molecule. Molecular formula gives us the actual number of different atoms in a molecule. Molecular formula can be the same as…
1 educator answer
- SCIENCE
Nicolaus Copernicus was an early astronomer who is best known for proposing the heliocentric model of the solar system, in which the sun is at the center rather than the earth. Copernicus was born…
1 educator answer
- SCIENCE
This is the famous energy-mass relationship equation proposed by Albert Einstein. Here, E is the energy of a body, m is its mass and c is the speed of light in vacuum. This relationship…
1 educator answer
- SCIENCE
In the Haber Process, the gases N2, H2 and NH3 are passed through the condenser. Its purpose is…
The boiling points of NH3, N2 and H2 are -33°C, -183°C and -252°C respectively. Note that boiling point is the same as condensation temperature. Their differences in boiling points are due to…
1 educator answer
- SCIENCE
How does water vapor affect the earth’s temperature?
Water vapor is the most powerful and most important greenhouse gas – 95% of greenhouse gases are water vapor. As temperature rises, more water is evaporated (from oceans) leading to an excess of…
1 educator answer
- SCIENCE
What are the temperature-dependent properties of materials used in making a thermometer?
Thermometers are devices used to measure temperature of a body or substance. Thermometers, typically, consist of a material that responds to change in body’s (or substance’s) temperature and a…
1 educator answer
- SCIENCE
What are the differences between anaerobic respiration in animals and plants?
There are two types of respiration: anaerobic, which does not require oxygen, and aerobic, which requires oxygen. The energy released by respiration is used by living organisms for their life…
1 educator answer
- SCIENCE
Plants, just like animals, can be sexual or asexual organisms. Sexual organisms utilize two organisms to undergo fertilization in the reproduction of offspring. Asexual organisms reproduce either…
1 educator answer
- SCIENCE
What causes faults in the Earth’s crust?
The plates of the Earth’s crust sit on a ‘sea’ of molten magma. The convection within the magma causes these plates to move – it is the energy release of this movement that causes faults. It should…
1 educator answer
- SCIENCE
Give a definition of “species” as it applies to biology.
In biology, a species is a group of genetically similar organisms that interbreed. In addition, the offspring must be fertile; that is to say, the offspring must be able to reproduce as well. The…
1 educator answer
- SCIENCE
Geocentrism is based on the geocentric model of the cosmos (or universe), a model that was widely accepted for over a millennium and across ancient civilizations. It is also known as Ptolemaic…
1 educator answer
- SCIENCE
What is the endoplasmic reticulum?
The endoplasmic reticulum is an organelle within eukaryotic cells (cells that contain organelles and a nucleus). Organelles are membrane- bound parts of cell that have a particular function that…
1 educator answer
- TO KILL A MOCKINGBIRD
In the book To Kill a Mockingbird, what chapter would you like to change and why?
This is an interesting question, and the answer depends on how you feel about the book in general. Did you find the plot interesting? Did you understand the author’s motive or purpose in…
1 educator answer
- SCIENCE
Studies of electricity and magnetism began in ancient times independently with the contribution of many scientists. Electricity is the branch that studies the processes related to the electric…
1 educator answer
- SCIENCE
What are chemical bonds and what do they do?
Chemical bonds involve the sharing or exchange of electrons in order to fulfill the octet rule and make molecules or compounds. The octet rule states that, in order to be content, all atoms desire…
1 educator answer
- SCIENCE
Why does crude oil contain sulfur?
Sulfur, carbon and hydrogen are the most abundant elements in fossil organic materials. However, sulfur in petroleum appears to be unnecessary. The origin of sulfur in petroleum is explained by the…
- SCIENCE
Sonar is an acronym for Sound Navigation and Ranging. It is a method that uses high-frequency sound waves to communicate or detect objects. Submarines use sonar for the reasons stated above. There…
1 educator answer
- SCIENCE
What two precious stones are forms of corundum?
Rubies and sapphires are forms of corundum. Corundum is a crystallized form of aluminum oxide (Al2O3) The “2” and “3” in the formula are meant to be subscripts, representing two molecules of…
1 educator answer
- THE CASK OF AMONTILLADO
The story, “The Cask of Amontillado”, starts with an example of hyperbole. What is it?
The story begins with the sentence: “The thousand injuries of Fortunato I had borne as I best could, but when he ventured upon insult I vowed revenge.” It is highly unlikely that the narrator has…
1 educator answer
- REFERENCE
How important are books for you? To what extent are you willing to sacrifice for you to be able…
Books have been highly important to me, not only as a means of information and entertainment, but also for the shared language they offer and the function of that language for different communities…
1 educator answer
- THE WEDNESDAY WARS
What do we learn about Mrs. Baker’s and Mrs. Bigio’s husbands in Gary Schmidt’s The Wednesday Wars?
In Gary Schmidt’s The Wednesday Wars, both Mrs. Baker’s and Mrs. Bigio’s husbands have been drafted into the Vietnam War. Only Mrs. Baker is lucky enough to have Mr. Baker return to her by the end…
1 educator answer
- THE PEARL
What is a theme for The Pearl by John Steinbeck?
One theme for John Steinbeck’s The Pearl, which he terms a parable, is The Evil of Greed, One of the Seven Deadly Sins. Steinbeck’s parable teaches the reader certain things about Greed: 1.When a…
1 educator answer
- THE LOTTERY
How does Shirley Jackson craft “The Lottery”?
The reason “The Lottery” has lasted so many years and is often anthologized and placed in lists of “greatest American short stories,” and the like, is that it is a beautifully organized work with…
1 educator answer
- LITERATURE
What is the summary for the book Sweetness and Power: The Place of Sugar in Modern History by…
This book is filled with the history of sugar and how it was introduced to European countries. It also discusses how sugar used to be viewed as a luxurious item during a time when people had a…
3 educator answers
- HISTORY
Where did Christopher Columbus land in the United States ?
Christopher Columbus never did land in what is currently classified as the United States. In fact, reasonable arguments can be made that, despite being credited with its discovery, Christopher…
1 educator answer
- HISTORY
List your unalienable rights. Which one would you most hate to lose and why?
According to the United States Declaration of Independence there are three examples of unalienable (or inalienable according to earlier drafts) rights that were given to all citizens and should be…
1 educator answer
- HISTORY
When did the Indus Valley civilization start?
The Indus Valley civilization, situated between the Indus and Saraswati river valleys in modern day Pakistan, arose in the third millennium BC; and by the year 2000 BC, it encompassed a huge amount…
1 educator answer
- HISTORY
What was Egyptian culture like before egypt was united in 3100 BC?
In prehistoric Egypt, their agriculture started to begin. By around 5400 BC, the people in northern (Lower) Egypt were farming, while the people in southern (Upper) Egypt were still engaged in…
1 educator answer
- HISTORY
Why did the United States acquire territories in the Caribbean and Pacific to create an empire?
The United States wanted to become a world power around 1900. Part of being a world power is having colonies. The problem for the United States was there weren’t many lands available to colonize…
1 educator answer
- HISTORY
Who was the first president of the United States?
The first elected president of the United States once the Constitution went into effect was George Washington. George Washington was a beloved figure. He was a great military leader who guided us…
1 educator answer
- HISTORY
Why was petroleum in high demand, even before its use as fuel for automobiles?
Petroleum was used for thousands of years as a sealant for ships to help with their buoyancy. The Chinese also used it to produce salt by burning brine. Asphalt was also used in the ancient world…
1 educator answer
- HISTORY
How were the changes to American society brought on by the American Revolution limited?
While the American Revolution had very radical effects for white, land-owning men in the colonies, the effects of the revolution were limited in that they did not extend to women, slaves and freed…
1 educator answer
- HISTORY
What made the Assyrian army so powerful?
If an empire expects to build into a great military power, it should anticipate making a substantial commitment to achieve such glory. In most instances, a great military requires trade-offs or…
1 educator answer