# Science

Science

A. The energy equivalent to matter with mass m is given by the equation E = m*c^2 where c is the speed of light. The fusion reaction in the Sun consumes 3.6*10^9 kg of matter each second. The...

Latest answer posted September 15, 2014 12:24 am UTC

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Ultimately, we are all alone. Each of us has relationships with other human beings, but we are still alone in our heads. Since we have no idea what is beyond the small parts of space that we can...

Latest answer posted May 5, 2012 4:01 am UTC

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Memory metals were first created and used by the Naval Ordinance Laboratory in 1965. The metal is really an alloy of the two metals nickel and titanium. "These alloys are called Nitinol, for...

Latest answer posted September 29, 2011 11:10 am UTC

Science

Typically, an ecosystem can recover from changes and disasters on its own, but occasionally humans need to step in. One major reason that humans sometimes need to give nature a little help has to...

Latest answer posted July 24, 2012 6:26 pm UTC

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Crude is a 2009 documentary about an Ecuadorian oil pollution crisis allegedly perpetrated by Chevron and Texaco. As a result of the ongoing crisis, a class-action lawsuit was filed against...

Latest answer posted July 26, 2016 12:58 am UTC

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Keeling measure is a graph that is used to identify the varying concentrations of Carbon dioxide (CO2) in the atmosphere. It is named after Charles David Keeling, a researcher who has been...

Latest answer posted February 22, 2013 5:23 am UTC

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Here we have a redox reaction. MnO_4^(-) is reduced to Mn^(2+) and NO_2^(-) to NO_3^(-) . MnO_4^(-)+8H^+ +5e rarr Mn^(2+)+4H_2O ----(1) NO_2^(-)+H_2O rarr NO_3^(-)+2H^++2e -----(2)...

Latest answer posted September 6, 2012 2:51 am UTC

Science

The moon jellyfish (Aurelia aurita) is a species of jellyfish which can be found in most of the world's oceans between the latitudes of 70 degrees north and 40 degrees south of the equator. They...

Latest answer posted April 20, 2016 10:11 pm UTC

Science

It's hard to give a simple answer to this question, because no two tumors are exactly alike; they have different growth rates and are lodged in different specific locations. If we assume that both...

Latest answer posted September 23, 2012 3:38 pm UTC

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There is more than one reason. Sickle-cell Anemia is an example where natural selection made it more prevalent than it would naturally be. Normal blood cells are caused by a gene that has...

Latest answer posted April 29, 2013 4:21 am UTC

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When work is done on a system, it is converted into energy. There is no such thing as a machine that is 100% efficient. In a machine, work is converted into energy. Energy comes in many forms,...

Latest answer posted July 21, 2016 12:27 am UTC

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I see where you are coming from with this question. When a strong base like sodium hydroxide reacts with a strong acid like hydrochloric acid, the end result is an ionic salt like sodium chloride...

Latest answer posted October 17, 2012 11:57 pm UTC

Science

Petrified wood is a fossil. Yes, it is a natural process. I suppose you could recreate the process in a lab setting, which would make it not natural. Because petrified wood is a fossil, the...

Latest answer posted September 15, 2015 8:15 pm UTC

Science

Aspirin works by blocking the cyclooxygenase enzyme COX-1. It acts as an irreversible inhibitor of the enzyme by adding an acetyl group to the active site. This is an irreversible reaction,...

Latest answer posted December 5, 2012 3:23 am UTC

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For this type of problem, we use the molar mass and Avogadros number in order to solve the question. Mass of compound -> Moles compound -> number of particles this step is vice versa. Let me...

Latest answer posted December 6, 2012 9:12 am UTC

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Modern biologists, expanding on the work of Charles Darwin, believe evolution to be a mechanism by which species change over time. There is no evidence that the genes or characteristics of the...

Latest answer posted February 27, 2012 8:35 am UTC

Science

The figure is attached below. The total infinitesimal luminous flux d(Phi) for a given infinitesimal area dS is the scalar product between the illuminance I and the infinitesimal surface...

Latest answer posted November 1, 2013 9:43 am UTC

Science

The kinetic energy of an object is the energy it possesses due to the fact that it is in motion. For an object weighing m and moving at a velocity v, the kinetic energy is given by KE =...

Latest answer posted March 3, 2012 9:45 pm UTC

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This is an amazing article! It really shows all the work CSI puts into their work. It could easily be used to show all the different aspects of an investigator's job for students to understand what...

Latest answer posted September 7, 2013 8:06 pm UTC

Science

There's no chemical reaction and therefore no new substance formed when an electronic or digital camera captures an image. A digital camera has a light sensor, which is an array of pixels (picture...

Latest answer posted December 21, 2015 5:24 am UTC

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While genetics looks at specific genes—usually to identify abnormalities in the code—genomics refers to the study of a person’s complete genetic makeup. Genomic technology and science hold the...

Latest answer posted May 29, 2020 11:22 pm UTC

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Hazardous wastes are those that can cause irreversible damage or severe damage and may include acids, strong bases, radioactive materials, harmful chemicals, carcinogens, etc. The method of...

Latest answer posted October 6, 2015 10:37 am UTC

Science

Adenosine triphosphate (ATP) is a molecule composed of an adenine base, a ribose sugar structure, and a chain of three phosphate groups. The three phosphate groups are negatively charged and would...

Latest answer posted March 18, 2016 4:29 pm UTC

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Direct current is the original electrical current that was produced when Thomas Edison went into business with the Edison Light and Electrical Company. It worked just fine except for one thing:...

Latest answer posted April 6, 2012 3:17 am UTC

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A blood culture is a test that may be ordered by a doctor when it is suspected that someone has an infection caused by either a bacteria or a fungus. The circulatory system is one of the few places...

Latest answer posted February 5, 2016 2:36 am UTC

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Carbon dioxide (CO_2 ) is the primary gas responsible for the acidification of the ocean. Carbon dioxide is absorbed into the ocean from the atmosphere. Sources of Carbon Dioxide There are both...

Latest answer posted June 1, 2016 4:17 pm UTC

Science

Fungi may look like plants. They are usually green, and can have parts that look like stems and leaves. However, as others have mentioned they are part of another kingdom and they get their...

Latest answer posted February 23, 2012 9:51 am UTC

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You can find this information on the US Geological survey website, posted as my first link below. When you ask for "geography" of each type of mountain, it may sound like you are asking just for...

Latest answer posted February 14, 2010 12:52 am UTC

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There is evidence that early Earth was different than Earth today. The atmosphere had no free oxygen—instead it consisted of methane, ammonia, water vapor, and hydrogen gas. It has been proven by...

Latest answer posted January 4, 2018 4:10 pm UTC

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I think you are asking if we could stay alive in a black hole if we did not stay very long. I would say no. Some scientists do think that we will eventually be able to travel through time, or...

Latest answer posted November 8, 2012 3:47 pm UTC

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The cell is the most basic unit of life, and it consists of various parts called organelles which are specialized sub-units each having their own specific functions. In eukaryotic cells, each...

Latest answer posted February 3, 2015 1:30 am UTC

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Based on my knowledge of the antibiotic doxycycline and its basic pharmacodynamics, it doesn't appear to be a contradiction. Upregulation is the term for a persistent increase in a cell or bodily...

Latest answer posted October 16, 2018 9:08 pm UTC

Science

Usually. Cats have an innate ability to orient themselves in mid-air so that they land on their feet. This is called the righting reflex. The longer the fall, the more likely a cat is to land on...

Latest answer posted November 1, 2015 5:39 am UTC

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Force is a vector that has both a magnitude and a direction. Similarly, displacement is also a vector. Work is the dot product or scalar product of the vectors representing force and displacement....

Latest answer posted October 23, 2011 10:13 pm UTC

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Sustainable development, in simple terms, means development in a sustainable manner. That is, the development is carried out in such a manner that the current needs are satisfied and the needs of...

Latest answer posted March 11, 2016 8:56 am UTC

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Pure substances are defined as a particle that is made up only one type of particle. Examples of pure substances are atoms, elements, compounds, and molecules. Atoms are the smallest unit of all...

Latest answer posted November 18, 2015 1:38 pm UTC

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I will write out each of Newton's laws of motion and handle each one individually: 1: A body at rest tends to stay at rest and a body in motion tends to stay in motion (in the absence of external...

Latest answer posted September 22, 2012 12:56 pm UTC

Science

Hello! Adenosine diphosphate (ADP) is a molecule that is a source of energy. But it is less than what ATP can give. ATP is adenosine triphosphate. It is being produced when the cell, primarily at...

Latest answer posted September 27, 2012 11:23 pm UTC

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If you are asking about green in reference to being "environmentally friendly", the affects would tend to be of more a positive nature in that pollution would drastically decrease. A cutback of...

Latest answer posted December 23, 2011 3:08 am UTC

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Rainbows have been there for billions of years, and people have been noticing them for the whole time there have been people (either about 200,000 years if you only include modern Homo sapiens or...

Latest answer posted April 29, 2016 7:06 pm UTC

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Reptiles and birds share several commonalities, which are specified below. Reptiles and birds are both made of eukaryotic cells. Eukaryotic cells are cells that contain a nucleus. Reptiles and...

Latest answer posted December 7, 2015 12:26 pm UTC

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Those questions each have to do with balancing a chemical equation. We can look at question number 1 as an example of how to complete the remaining questions: ____Al + ____S ---------->...

Latest answer posted January 19, 2011 10:44 am UTC

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Some folks do not have the faintest idea what smoking does to the body and, in addition, the effects of nicotine addiction causes irrational behavior and dependence. Logic is not what an addict...

Latest answer posted October 9, 2009 3:08 pm UTC

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The relationship between the surface temperature of a star and the wavelength at which it radiates most strongly is called Wein's Law, which can be expressed as W = 2897 / T where W is the...

Latest answer posted October 19, 2009 12:50 pm UTC

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Multiple sclerosis affects the myelin sheaths which is a fatty insulating material that surrounds the axons of nerve cells(neurons) in the brain and spinal cord. This results in scarring and...

Latest answer posted January 25, 2011 7:24 am UTC

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Here is an excerpt from the United States Fish and Wildlife Service pertaining to polar bears and who may hunt them and for what purposes: Alaska Natives (Indians, Aleuts, and Eskimos) who...

Latest answer posted May 30, 2010 12:11 am UTC

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Vinblastine is an antimicrotubule drug used in the treatment of various kinds of cancer. Cancers that respond to the administration of this drug as part of a controlled chemotherapy regimen are...

Latest answer posted January 7, 2012 1:05 am UTC

Science

The total air pressure at any given time is the sum of the individual pressures of all the gases in the air when the air is sampled. Mathematically this is: Pt = P1 + P2 + P3 + ... where Pt is...

Latest answer posted January 14, 2012 2:08 am UTC

Science

A mutation is any change in the genetic material, and it is likely affecting a specific gene. The mutation could be caused by a copying error, radiation, or chemicals. Unlike what comics teach...

Latest answer posted June 12, 2020 2:28 pm UTC