Significant figures for special functions (square roots)
Dec 13, 2020 · The discussion centers on the appropriate number of significant figures (s.f.) to retain when calculating square roots, specifically using the example of , which has 2 s.f. …
Square Root of 4: Can it be +2 or -2? • Physics Forums
Mar 6, 2010 · The square root of 4 can be +2 or -2, your math teacher is retarded. What you did with the imaginary number results in what I believe is called an extraneous solution (correct …
What is the value of 1 divided by the square root of 2? - Answers
Mar 12, 2025 · What is the value of 1 / sqrt 2 and how does it relate to mathematical calculations? The value of 1 divided by the square root of 2 is approximately 0.707.
What is the significance of sqrt {2gh} ? • Physics Forums
Apr 22, 2010 · The equation \ (\upsilon = \sqrt {2gh}\) is significant in physics as it relates to kinetic energy (KE) and potential energy (PE), particularly in escape velocity problems and …
Why Does sqrt(x^2) Equal |x| and Not Just x or -x? - Physics Forums
May 29, 2009 · The equation sqrt (x^2) = |x| is established as a definition in mathematics, where the square root function is defined to return the non-negative root. This is necessary because …
Reason for dividing peak value by sq. root 2 to get RMS
Feb 19, 2009 · The discussion centers on the mathematical derivation of why the peak voltage or current is divided by the square root of 2 to obtain the root mean square (RMS) value. …
Why this rms voltage is 0.707 times peak voltage? - Answers
Feb 26, 2025 · The root mean square (RMS) voltage is 0.707 times the peak voltage for a sinusoidal waveform because of the mathematical relationship between peak and RMS …
Log base 2 is the same thing as square root? • Physics Forums
Feb 9, 2013 · The logarithm of base 2 of a number x, denoted as log₂ {x}, is not the same as the square root of x, √x. The logarithmic expression log₂ {x} = y implies that x = 2^y, while the …
How to find the square root of a number? - Answers
Feb 16, 2025 · To find the square root of a number, you can use a calculator or a mathematical formula. The square root of a number is a value that, when multiplied by itself, gives the …
Why does sqrt(24) = 2*sqrt(6)? - Physics Forums
Dec 18, 2011 · The discussion centers on understanding why the square root of a product, such as √(24), can be simplified to 2√(6). The key principle is that for non-negative numbers a and …