A subscript is just a tool used to define a variable such as if you were give a trapazoid, (with two bases) you could label them b sub1 and bsub2
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Suppose you have a variable, such as the mass of an object. We usually denote this with something like m. However, if we were working on a problem involving several masses, we cannot use m for each ones. Therefore, we insert subscripts such as mb, m1, etc. to be more specific.
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In physics, it means the horizontal velocity.
Exponents
"Numeral" is another term for "number."
A term is a number or the product of a number and variable(s).
the mean
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subscript
the subscript g after H2O indicates that it is water vapour, a gas, which is what the subscript g stands for. If there was a subscript s after the H2O, it would mean that H2O is in a solid form as ice. If there was a subscript l it means that H2O is in the liquid form as water.
once in a lower (subscript) position
usually a subscript denotes the number of atoms of a particular element within the formula. ie H2O (the 2 would be a subscript) indicates there are two atoms of hydrogen in one molecule of water.
it means p times 4
The subscript is the number of atoms.Example: U3O8Uranium octoxide has 3 uranium atoms and 8 oxygen atoms.
The term is the subscript. In this case, the subscript 4 indicates that there are a total of 4 nitrate ions, NO3, in the compound Calcium Nitrate, Ca(NO3)2.
There is one atom of that element in the molecule.
Why doesn't the 0xygen have a subscript?
The subscript 4 in CF4, which stands for carbon tetrafluoride, indicates that there are four fluorine atoms bonded to one carbon atom in the molecule.
Especially if the 2 is written as a subscript, it means the base-2 logarithm.