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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
Atomic mass equals the number of what?
The atomic mass NUMBER equals the number of protons and neutrons in an atom.
DO NOT confuse this with the mass of an atom.
How is chess associated with the golden ratio?
Gabries Bosia determined a way to construct the golden ratio (phi) while pondering the knight's move in chess. The method involves inscribing a right triangle of sides 3, 4 and 5 within a circle. For more information, please see the links below.
Why is it important to have a constant in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable.
All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
Difference between pointer to constant and constant pointer?
1. pointer to a constant means you can not change what the pointer points to
2. constant pointer means you can not change the pointer.
What is the average atomic mass for chlorine?
Chlorine is a non meta element. Atomic mass of it is 35.
How long does it take a present value amount to triple if the expected return is 9 percent?
It will take 12.75 periods.
The speed of light in any material medium is less than it is in empty space.
They are the same.
There is no absolute answer to "Who is moving ?". Motion is always relative to something.
With Mr. 'A' and Mr. 'B' floating past each other in space ... first of all, for this discussion
it doesn't make a bit of difference what their masses are. In fact, they don't even both
have to be people. Maybe one of them is a space station, or even a planet, and the other
one is an astronaut who just happens to be sailing by.
Before you can even talk about their motion, you have to set up the rules, and make it
clear what reference for motion you're using. If the reference is you, then OK. You watch
both of them and describe how you see each one moving. Maybe one is moving toward you
at a constant speed, maybe the other one is moving away from you in a big curve, maybe
one of them is hardly moving at all. Whatever you see, that's the motion ... referred to you.
Now get on the radio and ask each of them what he sees. Mr. 'A' will tell you that
he's just hanging there motionless, and Mr. 'B' is sailing past him. Then, just as you
might suspect, Mr. 'B' will get on the horn and tell you that he's just hanging there
in space and Mr. 'A' is sailing past him. They're both right.
Have you ever watched video of an astronaut on a "space walk" outside the Space
Shuttle ? He's just hanging there, with his feet a few inches away from the Shuttle's
body. There's a rope between him and the Shuttle, but it's limp. As far as he's concerned,
he's hanging there, motionless, just off the skin of the Shuttle, and when the rest of
the crew inside look out the window, they agree. They see him just hanging there
motionless. Neither the floating astronaut nor the crew inside see anything moving.
Everything is almost perfectly still.
But we know ... and they certainly do too ... that the Shuttle and the spacewalking
astronaut are both in orbit around the earth, moving at something like 18,000 miles
per hour referred to anybody on the earth.
There's no such thing as "real" motion. It always depends on who is watching it
and measuring it.
Use the definition of "index of refraction". In this case, you simply need to divide the speed of light in a vacuum by the index of refraction.
What are constants for in Excel?
Constants are fixed values, so they never change. They are used in formulas where you know a particular value does not change. If you have a formula that is always going to multiply something by 2, then the 2 is a fixed value and can be entered into the formula as a constant, while the other value will be a cell reference, so it can have a variable value, like in the following formula.
=H5 * 2
What are the complete numbers of pi?
Pi doesn't end. It has been computed as of October 2011 to ten trillion places with no discernible pattern.
An integer is a number, positive or negative. So 15 is an integer.
