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Mathematical Constants
Intriguing, ubiquitous, and at times mysterious, numerical constants set the allowable limits for all universal phenomena. Whether your questions involves π, Avogadro's number, Planck's constant, the atomic mass unit, or any of the other multitudes of immutable numbers used in science, this is the category where they should be asked.
2,332 Questions
Is atomic mass unit a SI unit of an atomic mass?
The atomic mass unit is not a SI unit.
An atomic mass unit is equal to 1/12 from the atomic mass of the isotope 12C.
What is the atomic mass the weighted average of?
It's the averaged weight of all of the known isotopes of an element. Elements have versions of itself that have the same number of protons and electrons, but different number of neutrons. Since protons and neutrons have a mass of 1 amu (atomic mass unit), you change the neutron number, you change the mass . . . even though the element is still the same. Ex: Carbon 14 and Carbon 12 are isotopes of carbon. Both carbon elements, but they each have a different number of neutrons (8 vs 6), so they have different masses.
How many squares roots does 36 have?
This can be taken as a trick question.
The principal square root of 36 is 6.
-6 times -6 is 36, so the negative square root of 36 is -6.
So depending on the context of the question, 36 either has one square root, or two.
Mathworld.com has a better explanation at
http://mathworld.wolfram.com/SquareRoot.html
I will not try to duplicate it here because of the use of math symbols.
What element has an atomic mass of 50.9?
Vanadium has an atomic weight of 50.9415 on the periodic table.
What is the Atomic mass of astatine?
The atomic mass of astatine is 209.9871 atomic mass units (amu). The atomic mass is given for the longest lived isotope of astatine, which is astatine-210, with a half life of 8.3 hours.
Hydrogens atomic mass number and relative atomic mass?
Hydrogen is a non metal element. Atomic mass number of it is 12.
What is the highest number we can count to?
There is no such number. If we could count to any particular number, then we can always count to the next one. And then the next. And so on.
What is the relative atomic mass of potassium?
the relative atomic mass for the element potassium is 39.0983
Since a microsecond is a millionth of a second, just divide the distance light travels in one second, by a million.
Gay-Lussac's law
Pi number can ONLY be used for which shape?
Usually a circle but its properties can also be applied to spheres
Can the atomic mass of an element change?
For elements with multiple natural isotopes the precise atomic mass could vary from place to place. Depending on the ratio of those isotopes. Living systems are a natural way isotopic concentration change in some elements. Lighter isotopes react faster and living systems will tend to concentrate them. Extraterrestrial sources of elements could have significantly different isotopic composition than Earth's. Nuclear decay could change some isotopes to different elements. Thus changing the isotopic ratios.
What are the first four numbers in Pi written backwards?
The first four numbers in pi are 3.141. Backwards, the first four numbers are 141.3. Pi has been calculated to over a million digits.
Earth's gravitational constant?
Earths gravitational constant, known as g, as around 9.81 m s-1 .
The word around is a tip-off that it is a somewhat inconstant constant. It varies slightly depending on your latitude, longitude, height a.s.l. and the type and extent of the minerals under your feet. This last explains why some geologists carry a handy instrument called a gravimeter.
What is the molar mass of SiC?
Molar Mass of Carbon + Molar Mass of Silicon = Molar Mass of SiC.
12.0107 + 28.0855 = 40.0962 g / mol.
Atomic mass of cholrine is 355 and its molecular mass 71 the atomicity is what?
The atomic mass of chlorine is not 355 it is 35.5 (approx). So, if the molecular mass is 71 then the atomicity is 71/35.5 = 2.
Can pi be expressed as a rational number?
It can be rounded to 3.14, this however does not make it a rational number.
A googol is a 1 with 100 zeroes after it. Basically, it's this 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 or 10100.
Googol History and facts...
In 1938, mathematician Edward Kasner wanted to show his students that a number could be fantastically large - so big that it would boggle your mind- and still not reach anywhere near infinity. His number ended up being a 1 with a 100 zeros after it. Since it needed a name, he asked his nine-year-old nephew what it should be. Milton realized that a enormous number should have a silly name. The winner was googol.
BTW,
there's a number thats called a googolplex. Thats a 1 with a googol zeros after it.
AMAZING, RIGHT?
How do you get the atomic mass and and atomic number?
it is simple. all you need to do is look in the periodic table the numbers above and under the letter.
Atomic number is determined from the number of protons in the nucleus. Atomic mass is determined from the number of protons AND neutrons in the nucleus. Since elements have multiple isotopes with differing numbers of neutrons, the atomic mass reported on periodic charts is usually the average atomic mass. As the first person who answered this question pointed out, you can usually find the atomic number by looking for a number above the atomic symbol for the element in the the table (H for hydrogen, C for carbon, Fe for Iron, Au for gold, etc.). Sometimes the number will be below the symbol but in bold font. When the periodic table gives an atomic mass, it is usually given under the atomic symbol and is almost always some kind of decimal number that is always greater than the atomic number, for example: Carbon has an atomic number of 6and an atomic mass of 12.0107 amu.
What is the earth's gravitational constant?
At the Earth's surface, the acceleration due to gravity is 9.8 m/s2.
How do you know who has the highest golden ratio?
The Golden Ratio is a constant = [1 + sqrt(5)]/2. There is, therefore, no higher or lower Golden Ratio.
