# Tagged Questions

Dimensional analysis means to obtain results by analyzing the units in question, etc. DO NOT USE THIS TAG if your question is about degrees of freedom or spatial dimensions.

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### Dimensional analysis of explosive energy, no temporal element

I have a question about dimensional analysis, using the calculation of the explosive energy of the Bomb by Taylor in the 1940s as example. I am neither physicist nor mathematician so will have ...
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As I understand it, a natural system of units is one in which the numerical values of $c$ and $\hbar$ are unity, i.e. $c=\hbar =1$. What I find confusing is that they are still dimensionful, i.e. $[... 2answers 174 views ### When are 2 quantities multiplied in physics? [closed] 5*3 = 15. We get 15 by adding five 3 times. Multiplication of 5*3 means adding 5 3 times.i,e multiplication is repetitive addition.Multiplication is perfectly defined in mathematics.$F= m*a$. If ... 1answer 67 views ### Calculus of Variations - Virtual displacements I am currently reading "The Variational Principles of Mechanics - Cornelius Lanczos", in which the author talks about the variation of a function$F(q_1, q_2, \dots q_n)$where$q_1, q_2, \dots q_n$... 1answer 61 views ### Non-dimensionalize Schroedinger's equation for this potential I am having trouble non-dimensionalize this S.E. in order to solve numerically.. the potential is $$V(x)=-V_{0}/(1+x^2/L^2)$$ we know that$A = V_{0}/\hbar \omega$is dimensionless, and$B = E/\...
I do best in physics when I can make sense of the units that accompany values, and I do this by visualizing in my mind what is happening. Take for instance, $v=\frac{s}{t}$. When I think of velocity I ...