Science Questions and Answers

Science

The four basic reaction types can be outlined as follows: Synthesis Reaction:A + B -> ABDecomposition Reaction:AB -> A + B Note that the synthesis and decomposition reactions are exact...

Latest answer posted January 30, 2012 3:59 am UTC

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Science

Hello! The speed is the distance travelled divided by the time spent. Here this is (200 meters) / (25 seconds) = 8 m/s. To express this in kilometers per second, let's express meters in kilometers...

Latest answer posted November 3, 2015 11:32 am UTC

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Science

ATP, ADP, and AMP differ in the number of phosphates and the amount of energy obtained by each compound. ATP stands for adenosine triphosphate. ADP stands for adenosine diphosphate. AMP stands for...

Latest answer posted January 31, 2016 11:20 pm UTC

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Science

Here again we have to assume that that the gas is behaving as an ideal gas. Then we can apply the ideal gas law to calculate the number of gas molecules in this question. The ideal gas law can be...

Latest answer posted May 21, 2012 6:19 pm UTC

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Science

Actually it is easier to balance a bicycle at rest then when it is in motion. The reason for this is the conservation of the angular momentum. A bicycle has wheels that once in motion, they...

Latest answer posted October 21, 2013 11:10 am UTC

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Science

The dodo is an extinct species of flightless bird formerly found on the island of Mauritius in the Indian Ocean in the 1600's. Extinction occurred due to the destruction of habitat and the...

Latest answer posted February 7, 2012 3:17 am UTC

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Science

Quantization simply means that the values are not continuous but are rather discrete. For example, weight is continuous because you can weigh anything up to any desired decimal point (the only...

Latest answer posted July 18, 2013 2:01 pm UTC

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Science

Natural sources refer to sources that are present naturally and have not been made by human beings. Some of the natural sources of light are: Sun: The Sun is the most prominent source of natural...

Latest answer posted May 14, 2016 11:52 am UTC

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Science

Fossil fuels are organic materials formed in the earth as a result of slowly decomposing plants and animals. It takes millions (sometimes hundreds of millions) of years to obtain fossil fuels and...

Latest answer posted September 15, 2016 8:30 am UTC

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Science

Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. Democritus lived from 460 AD to 370 AD. He reasoned that because a rock can be...

Latest answer posted December 3, 2015 9:45 pm UTC

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Science

The major difference between physical and chemical changes is the change in composition. For a change to be termed physical, there should be no change in composition of constituents. In other...

Latest answer posted October 28, 2015 12:00 am UTC

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Science

First, let's distinguish between the terms solute, solvent, and solution: Solute: A solute is a substance that dissolves in a solvent. Solvent: A solvent is a substance that is able to dissolve a...

Latest answer posted February 29, 2016 8:57 pm UTC

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Science

(NH4)2SO4 is an ionic compound that dissociates itself upon its addition to the solvent to form a solution. When it is in the solution it forms ions. The balanced dissociation for for (NH4)2SO4...

Latest answer posted October 19, 2012 11:52 am UTC

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Science

A biome is made of several ecosystems. Biomes are classified by distinct climates, vegetation, and wildlife. Tundra and desert are two examples of biomes. There are two kinds of tundra: the arctic...

Latest answer posted February 10, 2016 12:54 pm UTC

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Science

If an insect which is already well-adapted to its environment is born with a mutation that affects its color, for the environment it is already in, it may be a disadvantage. However, nature is not...

Latest answer posted April 9, 2013 2:56 am UTC

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Science

Based on the "compare" wording of the question, I am assuming that the answer should provide more similarities than differences between the vascular system of plants and the circulatory system of...

Latest answer posted February 6, 2018 2:15 pm UTC

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Science

The solubility is the maximum amount of a substance that will dissolve at a given temperature. A saturated solution contains that maximum amount that can be dissolved, so the solubility of 9.30...

Latest answer posted October 26, 2015 8:35 pm UTC

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Science

A takayama test, also known as hemochromogen crystal assay, is used to determine if blood is present in a sample of interest. This assay is used by experimenters, or investigators of crime scenes,...

Latest answer posted December 22, 2015 7:37 pm UTC

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Science

There are three basic “rules” that tend to be universally accepted as parts to the cell theory. These “rules” are identified below: Cells are the basic fundamental unit of structure, function, and...

Latest answer posted December 18, 2015 1:36 pm UTC

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Science

The atria are thinner than walls of ventricle because of there function. Since we known that atria receives blood from various parts of the body and ventricles pump blood to various parts of the...

Latest answer posted June 18, 2012 9:30 pm UTC

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Science

Energy: The Bohr model and the Quantum Mechanical model of the atom both assign specific energies to an electron. In the Bohr model the energy of an electron is determined by the Rudberg equation...

Latest answer posted November 30, 2015 2:39 pm UTC

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Science

When speaking of eclipses it is important to first discuss the two possible types. One such type is a lunar eclipse. This occurs when the moon passes through the shadow of the earth created by the...

Latest answer posted November 19, 2015 2:43 am UTC

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Science

Both the water cycle and carbon cycle are Biogeochemical cycles, that is, the material moves between the biotic (living organisms) and abiotic (lithosphere, atmosphere and hydrosphere) compartments...

Latest answer posted May 21, 2015 12:15 am UTC

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Science

Methanol has a higher boiling point than methane because it has stronger intermolecular forces (IMFs), which are attractions between individual molecules. This makes its molecules harder to...

Latest answer posted November 23, 2015 2:32 pm UTC

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Science

Momentum is a product of an objects mass times the velocity it is experiencing. Momentum may be increased or decreased by manipulation of either the mass or the velocity. The formula for...

Latest answer posted January 12, 2016 6:44 pm UTC

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Science

A scientific question is a question that may lead to a hypothesis and help us in answering (or figuring out) the reason for some observation. Asking a scientific question is a part of the...

Latest answer posted October 6, 2015 5:49 am UTC

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Science

Hydrochloric acid and sulfuric acid are both strong acids and as such do not react to yield a very different product. Following is the balanced chemical reaction for the given scenario: `H_2SO_4...

Latest answer posted March 4, 2016 12:51 am UTC

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Science

There are more mitochondria in muscle cells than there are in skin cells. Cellular respiration occurs in mitochondria. There are three stages to cellular respiration- Glycolysis, the Krebs cycle,...

Latest answer posted January 28, 2016 8:15 pm UTC

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Science

I am assuming you are weighing a hydrate in an evaporating dish, heating it to remove the water, and then weighing the evaporating dish to get the difference in mass. The reason you let the dish...

Latest answer posted March 1, 2013 1:13 am UTC

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Science

F = qvB Where, F - Force, q - Charge B - Magnetic field. v -velcoity of electron q = 1.6 x 10^(-19) C (charge of an proton is same as an electron) B = 0.15 T v = 1.7 x 10^7 ms-1 F = 1.6 x...

Latest answer posted May 16, 2012 5:16 pm UTC

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Science

Yes, a child of 9 has the same number of bones as an adult but they are still growing and maturing. The adult skeleton has 204-206 bones so the child has the same number. Bone growth continues to...

Latest answer posted May 26, 2010 9:23 am UTC

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Science

The equation necessary to solve this problem is: m`` =dsin`` In this problem m is equal to 1 as we have been given the angle of the first order maximum: `` The above equation is then simplified to:...

Latest answer posted May 28, 2012 7:46 pm UTC

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Science

The specific heat is the measure of how much heat per unit mass required to raise the temperature by 1º Celsius. The formula is given as Q = cm∆T where Q = the amount of heat added c = specific...

Latest answer posted January 29, 2012 8:55 am UTC

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Science

Combustion is a form of a chemical reaction in which the reactants are oxygen and (usually) a hydrocarbon. The reactants of a combustion reaction are usually water and carbon dioxide. The first...

Latest answer posted November 21, 2015 9:46 pm UTC

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Science

A dominant species in an ecosystem is the most abundant species present. It makes up the highest percentage of the total biomass in the system. A keystone species is one that has the greatest...

Latest answer posted September 22, 2012 9:37 pm UTC

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Science

Here is a list of why science is cool: Science helps you explain the phenomena around you, such as how glaciers are formed or how we get fruits from a plant. Science enables critical thinking and...

Latest answer posted November 24, 2015 12:43 am UTC

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Science

Gause's competitive exclusion principle, or sometimes called--Gause's Law, states that when two species are competing for the same resources, the one that is best adapted or that has an advantage...

Latest answer posted November 15, 2012 1:41 am UTC

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Science

In addition to the above answers, which are all valid and important points, we can also look at this from a national security and independence viewpoint. We import 2/3 of the oil we use, and much...

Latest answer posted January 23, 2010 2:14 am UTC

2 educator answers

Science

Fleas and dogs have a symbiotic relationship. In fact fleas can have this symbiotic relationship with any warm-blooded animal. The relationship is a parasitic relationship. In a parasitic...

Latest answer posted April 18, 2013 12:49 am UTC

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Science

When balancing combustion reactions, do the carbon and hydrogen first, then the oxygen last. Step 1: 6 carbons on the left, so you need 6 CO2 on the right. Step 2: 12 hydrogens on the left, so you...

Latest answer posted May 31, 2011 7:00 am UTC

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Science

The above information shows that radish shape is incompletely dominant. The fact that there are three phenotypes is the strongest evidence for this. The other piece of important evidence is the...

Latest answer posted June 24, 2015 3:00 pm UTC

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Science

The work function of a metal `phi` , the wavelength of the incident photon lambda required to eject an electron with the maximum kinetic energy `K_(max)` is expressed by Einsteins photoelectric...

Latest answer posted December 8, 2016 9:03 pm UTC

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Science

Acids and bases affect our environment significantly by altering it. These alterations may be beneficial in some cases, while in others, maybe really harmful. Acids and bases occur naturally in our...

Latest answer posted March 6, 2016 5:55 pm UTC

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Science

When a tight guitar string is stretched by a finger or pick (in preparation for plucking), it has been imparted with potential energy. When the string is released, the potential energy is...

Latest answer posted July 31, 2013 12:04 am UTC

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Science

Adhesion and cohesion are water properties that affect living and non-living things on earth through water molecules. Cohesion: Water is attracted to waterAdhesion: Water is attracted to other...

Latest answer posted September 5, 2016 2:40 pm UTC

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Science

Air pressure, or atmospheric pressure, is defined as the weight of air in Earth's (or another planet's) atmosphere. Pressure is a force exerted on or against an object by being in contact with a...

Latest answer posted November 4, 2015 2:06 pm UTC

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Science

Potato cells in distilled water will have difference in concentration (concentration gradient) of water between the extracellular and intracellular environment. In this case, there will be a higher...

Latest answer posted November 21, 2015 3:08 pm UTC

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Science

The backbone (or spinal column) is made up of bones known as the vertebrae and hence the animals that have a backbone are called vertebrates. Some examples of vertebrates are mammals, birds,...

Latest answer posted October 20, 2015 12:15 am UTC

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Science

You can only ask one question at a time so I edited out your second question. A: You have a mistake in your reaction. I suspect you mean: 2SO2 + O2 --> 2SO3 The SO2 has the S in the +4...

Latest answer posted April 13, 2013 10:28 pm UTC

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Science

The 5 organelles which are typically considered to not be found within animal cells include the following: 1. Cell Wall - This is a cell structure outside of the plasma membrane which is composed...

Latest answer posted November 20, 2015 1:29 am UTC

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