# Science Questions and Answers

### Recently Answered Questions

• Science
Conversion factors are used to change one set of measurement units into another set for calculation purposes. The conversion factor is a fraction which is used to cancel unwanted units and to...

• Science
A gemstone that gets its color from titanium is sapphire, because of the blue color given to it by traces of titanium found in the stone. "Most gemstones are allochromatic, meaning that they...

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Visible light is composed of all the colors in the spectrum of visible light, those being red, orange, yellow, green, blue, violet, and indigo. Those all combine together to produce white light....

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By Newton's Second Law, the acceleration of an object is proportional to the net force and inversely proportional to the mass: a = Fnet/m If Fnet is a constant, then as m increases a will decrease...

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Moist heat controls microbial growth by C. denaturing proteins. Moist heat destroys microbes by denaturing their essential proteins. Once proteins are denatured, they can no longer function....

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There are several reasons one feels cold after hemodialysis. The main reason is that the blood is put through a filter outside the body and that lowers the blood temperature. Although the machine...

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This is formed by the reaction of strong base KOH and weak acid H_3PO_4. The dissociation is a partial reaction at an aqueous media. K_3PO_4 rarr 3K^++PO_4^(3-) This is known as Potasium phospate.

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In general, electrical resistivity (rho ) of conductors increases with temperature (T ). Conductivity (C ) is the inverse of rho. Therefore, rho alpha T 1/C alpha T C alpha 1/T The...

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Not all hydrates can be done by simply heating them for some reasons. Some hydrates like AlCl3 decomposes when heated. Upon heating AlCl3-nH2O, it decomposes to HCl and Al(OH)3. Some hydrates are...

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Angular velocity is defined as the rate of change of angular displacement. It is a vector quantity (magnitude + direction). The magnitude component is the angular speed, while the direction is the...

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The atomic number is unique to each element. It is the sum of protons in the nucleus of an atom. This is not to be confused with the atomic mass. This is the number of protons plus neutrons in the...

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density is a ratio of mass to volume, so density = mass/volume = 20/31 gm/ml = 0.645 gm/ml

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For the butterfly, its evolutionary story began around 30 million years ago, according to the fossil record. Insects evolved wings to get from place to place and to reach more sources of food--in...

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D) All living things use the process of respiration

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In the calibration you measured a yield of 84.158 % (.85/1.01*100) for the amount of gas produced by the decomposition of sodium carbonate. Note that this assumes a pure sample of sodium carbonate...

• Science
It seems that the data that you have is not complete.Please check the equation you had in class and the reactions that you have done in the laboratory. 2NaOH+CuSO4->Cu(OH)2+Na2SO4 is a probable...

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I found an article titled "Animal Life in Michigan during the Ice Ages" (included in the answer) in which it says: "tundra plants and animals were trapped by the ancestral Great Lakes system when...

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It is really very easy to understand. Without water there is no way for the nutrients to enter or the waste products from metabolism to be removed. Water is the carrier that moves throughthe cell...

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The melting point and boiling point are too high for the compound to be a covalently bonded substance. But generally compounds formed between non-metals and groups 1 & 2 have much higher...

• Science
This would depend upon the nature of the failure of the two systems. The CV system would be monitored through normal criteria, starting with pulse, blood pressure, oxygen saturation. Then heart...

• Science
ATP - energy is created when its bond is broken Kinetic Energy-energy of motion Anabolic reactions-make molecules cellular respiration-process by which cells produce energy ADP- resulting molecule...

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This is an example of a non-elastic collision. This means that two objects collide and stick together after the collision. The general form of the equation is: m1v1 + m2v2 = (m1+m2)v m1v1 are the...

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Keeping in mind that not every developing country will have all of these factors... In general, there's no way to really connect population to whether or not a country is "developing." You can...

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A polypeptide is a long chain of amino acids. These are produced on the ribosomes, during protein synthesis. Messenger RNA contains the genetic code to assemble the polypeptide. Transfer RNA...

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If we have an alloy then we actually have a blend of metals so any ionization energies that we would look at for the alloys would actually be for the individual metal atoms. If we were to start...

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Yes, as a matter of fact, it does. Workplace Hazardous Materials System has indeed issued a tag for potassium iodate. This product has a WHMIS classification of C, D2B. Please refer here, for the...

• Science
Hello! It is lithium (Li). Its density at a room temperature is 0.533 g/(cm^3) (almost twice a light as water). Actually, it is less dense than kerosene which is used to store sodium and...

• Science
Let us consider a volume of 1L MgCl_2 solution. Mass of the solution = 1000xx1.35 = 1350g It is given that the mass percentage of MgCl_2 is 55.5% Mass of MgCl_2 = 1350xx55.5% = 749.25g...

• Science
It isn't possible to provide the net ionic equation unless both the sides of the chemical equation are available. The ionic equation of one side of the chemical equation that is provided is:...

• Science
There is really not enough information to definitively answer the question. For C6H12 there are actually 8 different organic structures that could be drawn. One of them is 3-methyl-1-pentene. For...

• Science
Reduce, reuse, and recycle.

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I have written out the answers for three of the four problems. I can't come up with a good mechanism for the third one so I am leaving it blank for now but will continue to think about it. Please...

• Science
A photon is a tiny packet of energy produced within an electromagntic spectrum. It has no resting mass, quite simply, it is a release of energy produced when an electron in an atom jumps from one...

• Science
CaCO_3+2HCl rarr CaCl_2+CO_2+H_2O Mole ratio: CaCO_3:CO_2 = 1:1 Molar mass of CaCO_3 = 100g/(mol) Amount of CaCO_3 reacted = 68/100 = 0.68mol Therefore Amount of CO_2 formed =...

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For the number of protons, we look at the atomic number of the element given. Take note that atoms must have equal numbers of protons and electrons. For the number of neutron, we must know the mass...

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This is easiest to understand if you look at a diagram; I have attached a link that shows this. The whole concept of current flow was defined before scientists really understood the structure of...

• Science
Heisenberg's Principle explains matter as a result of particle motion. In the field of quantum physics, however, there remained unsuccessful attempts to explain the occurence of physical...

• Science
Generally speaking, the higher the ionization energy a metal has the more soluble its salt will be. However, the rules of solubility for ionic compounds are best explored through charts similar to...

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Frequency and wavelength of a wave are related by the following relationship: lambdanu = c` i.e., the product of frequency and wavelength is equal to speed of light in vacuum. Using the given...

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Water quality criteria are the standards of boundary in terms of chemical, physical and biological parameters to achieve the proper water usage. It is also the term to describe how protected the...

• Science
First, R1 and R4 are in series with each other, suppose these two form an equivalent resistor R5, then, R5 = R1+R4 Now this R5, R3 and R3 are in parellel to each other. Suppose these three form a...

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In order for diffusion to occur, it must occur through a very thin moist membrane as found in the alveoli. The bronchus is a thick tube which is not one layer of cells thick. When there is a high...

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In semiconductors, current is often visualized by the flow of electrons or positively charged holes from atom to atom in the material. However, only the electrons are actually free to move. The...

• Science
Thermal pollution affects the fish population negatively by warming ocean waters to temperatures that the fish can't survive in. Because the fish have to live in waters that are just the right...

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The jatropha tree is coming to be seen as a major hope for those searching for better sources of biofuel. One of the major factors that makes jatropha a likely candidate for exploitation is the...

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According to wikipedia the process takes about 24 - 72 hours. I've attached a couple resources to look at to get a better idea.

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1. Traits controlled by more than two alleles have multiple alleles. True. Traits controlled by more than

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Sand is not a poor conductor of heat; it is actually a very efficient conductor. Think about being at the beach in the summer—it doesn't take very long for the sand to get hot in the summer sun,...