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It is a physical change: the wood (mostly cellulose) is not changed by the breaking. However, the living cells (if any) in the branch will begin to change chemically when exposed to the air and cut off from the xylem and phloem in the rest of the tree. Eventually the cells will die and the wood will rot (chemical changes).
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Why are electrodes applied to the fleshy part of a limb?
why are limb leads placed on fleshy parts of the body
Which limb sensor is the reference or ground electrode?
left arm
What is the organic compound composed of a carbon chain with hydrogens attached and an acid group at one end and a methyl group at the other?
If by 'acid group' you mean a carboxyl group (COOH), and by 'methyl group' you mean the carbon is right at the end, then it isn't really a methyl group, just a normal carboxylic acid2 carbons: Ethanoic Acid, CH3COOH3 carbons: Propanoic Acid, CH3CH2COOHIf the methyl group was in the middle. The number of carbons here includes the methyl group, but note the name of the chemical doesn't correspond to the total number, but by the longest chain possible.4 carbons: 2-Methylpropanoic Acid, CH3CH(CH3)COOH5 carbons: 2-Methylbutanoic Acid, CH3CH2CH(CH3)COOH3-Methylbutanoic Acid, CH3CH(CH3)CH2COOH
Is CaCi2 ionic or covalent?
I'm going to go out on a limb here and assume you meant to put CaCl2 rather than CaCi2. (since, to my knowledge, there is no element with the symbol Ci). CaCl2, Calcium Chloride, is ionic. When trying to determine if a chemical bond is ionic or covalent, you have to determine the difference in the electronegativity of the two atoms involved. Ca (Calcium) has an electronegativity of 1. Cl has an electronegativity of 3.16. The difference is 2.16. As a rule of thumb, a difference greater than 1.9 (some sources online may vary slightly) tells you that the bond is ionic. What this basically means is that the electrons that are being 'shared' to form the bond between the two atoms, really spend MOST of their time around the atom with the higher electronegativity. Keep in mind that electronegativity is a measure of an atom's affinity for an electron. Basically, how much pull that atom has on the electron. The higher the electronegativity, the greater the pull. So, when you put such an atom in water, the two atoms come apart with one of the atoms LOSING an electron to the other atom which then has an extra electron. Thus one of the atoms ends up being positive and the other ends up being negative. I hope this helps.
How did John Dalton's discovery of the atom change our views of the atom or its properties?
Though the earliest atomic theory may have originated more than two thousand years ago with the Greek philosopher Democritus, the view was effectively killed with the seemingly superior ideas of Aristotle, and surely it seemed as if it would stay dead forever. Other Aristotelian views were questioned during the Renaissance period and beyond by Copernicus, Kepler, Galileo and Newton, but his theory that matter was made up of the "four elements" remained intact through it all.The Atom RebornIt was actually not until still another two hundred years after Isaac Newton that Aristotle's view on the constitution of matter began to be questioned in any sort of a convincing matter, and it was then that the modern atomic theory finally began to gain popular acceptance, long after Democritus' pre-atom atomic theory had been forgotten by all but the most avid scholars of scientific history (though he is still often referred to as "the father of atomic theory," though one can argue that others, including the scientist about to be discussed, are more deserving). It was the English Chemist John Dalton (1766-1844) who in the early 19th century graced the world with the first attempt at a fully workable, pragmatic view of atomic theory. It was his clever and remarkable work with the pressures and weights of many different gases which led him to believe that their properties might in fact be dependent on the tiny little particles (atoms) -- differing only in their weights -- from which they were formed. Dalton went on to deduce that different types of atoms could potentially combine to form all of the various known elements.Consequently, Dalton was even the first to make an attempt at creating a table of atomic weights (a rough one in 1803, then a better one in 1805) -- a task which would be expanded upon to near perfection by Russian chemist Dmitri Mendelev more than sixty years later, resulting in a periodic table very similar to the one we should all be somewhat familiar with today.In the end, John Dalton developed such important tenants of atomic theory as the fact that all atoms of a given element are identical in every way, that no two elements share any common atoms and that atoms (elements) can bind together to form compounds.Dalton's Noble, yet Imperfect TheoryThere was one nearly fatal flaw in John Dalton's logic regarding atomic theory, however. In his list of atomic rules, Dalton made sure to add that these particles must, by definition, be indivisible -- as the name "atom" in its original language suggested (for it means "uncuttable" in Greek). He stated that there could be nothing smaller than an atom, despite the fact that there was not yet (nor would there ever be in the future) any real evidence that this was the case. In his mind, he had found the most basic building blocks of the universe.Of course Dalton turned out to be quite wrong about this, as most people have learned quite early in school. Of course, a scientist is only as good as the tools we have to work with, and Dalton certainly made great headway with the still rather primitive scientific tools at his disposal (and with a absolutely no previous work in order to compare his own to). Still, the appropriate thing to do from a scientific perspective would have been to make no assertions beyond what was readily evident via experimentation.Still, perhaps it is the mark of a good scientist that John Dalton was willing to go out on a limb and make such a bold assertion in the first place. After all, he was questioning more than two thousand years of scientific dogma, perhaps he thought that having found the ultimate building blocks would serve him even better in posterity.Surely, John Dalton couldn't possibly have known what was in store for atomic theory. While he surely died relatively confident that his atoms did, in fact, exist, he could not possibly have foreseen the discovery of their structure, or their many parts, or the forces that bind them all together. He could never have guessed that the theory he played such an important role in would have led to the Large Hadron Collider -- the largest, most expensive, particle accelerator in history which has been designed to probe the depths of atoms and their subatomic constituents.
Is yeast causing bread to rise is a physical or chemical change?
Yeast rising bread works because yeast (an organism) converts starch to carbon dioxide which makes bread grow. This can be seen as a chemical reaction (yeast converting starch to CO2 gas) or a physical reaction (the CO2 making the bread expand).
How many limbs has horse if one limb break?
a horse has three after the breaking of limb
What does the energy come from that enables you to breathe and think?
I'm going to go out on a limb here and say food.
What are baseball player Limb McKenry's physical stats?
Limb McKenry is 6 feet 4 inches tall. He weighs 205 pounds. He bats right and throws right.
What physical problems prevent enlistment to marines?
Some obvious physical problems would be being paralyzed or missing an arm, leg, or other limb.
Can you undo a physical change?
Explain physical change: Plastic Surgery- Sometimes, but more oft then not.. No. Body features and physical appearance from current- yes, you can lose weight or gain weight according to exercise and diet and other factors. you could change eye color by contact lenses or whiten your teeth. you could change your hair style and life style. Some things cannot be undone- like.. you cannot undo undoing your virginity or chopping off a limb. (good luck with that!!)
Why is right arm stronger than left?
You do physical work with your right limb. So you do more exercise by your right arm. So your the right arm or limb becomes stronger than left.
What physical property of the sun is responsible for limb darkening?
The lower photosphere is hotter than the upper photosphere.
How did the average hind-limb length of each island's lizard population change from that of the original population?
The average hind-limb length of each island's lizard population change form that of the original population because of adaptation.
How do you say cut you from limb to limb in old English?
Perhaps the expression you want is "limb from limb" and not "from limb to limb."
How is a blood clot diagnosed?
physician may also notice such physical signs of a blood clot as the swelling blue bulge, discoloration of a limb, or an ulcer. Medical personnel will also check for a missing or lowered pulse or blood pressure in a limb.
What is the medical term meaning false limb?
A false limb is a prosthetic limb.
