Hi,
I just want to share my curiosity
in the definition of 4-vector quantities such as world line 4-vector x^alpha, 4-velocity vect, gauge potential etc. the ones with subscript for indices usually have the first component with negative sign and the ones with superscript for indices have all...
Hi everybody,
I just want your opinion in some questions: First of all, how do we define a physical quantity? Is it a mathematical creation that helps us describe something happening in nature? And all these formulas that we have come up with: example F=dp/dt . Are they mathematics or...
I'm curious about something - What quantities in physics do you think are "defined" quantities, i.e. quantities which are defined in terms of other physical quantities and therefore are not required? e.g. momentum is defined as p = mv, velocity is defined in terms of space and time, i.e. v =...
In the Halliday-Resnick textbooks, there is only mention of strength of a magnetic field, which in SI units is the derived unit Tesla.
However, on my TI-89 and on more modern sources on the internet (including a Fuji-film PDF!), there is mention of the unit of the Oersted for magnetic field...
The Haber's process facilitated the production of chemical fertilizers such as ammonium nitrate and has a dramatic impact on crop yields. Since the 19th century, average crop yield per hactare have increased almost five fold for cron and eight-fold for wheat. However, runoff from fertilized...
general "quantities in chemical reactions" questions
hi,
im in high school, and we are currently doing a unit of chemistry on quantities in chemical reactions, and there are a few things i don't get, and i was wondering if anyone could show me a formula or an example, on calculating the...
We all know the speed of light has a absolute value in vacuum measured by all observers from various reference frames and itis the fastest speed in the universe.
My question here is, if there is a limitation on how fast matter would travel, is there also a limitation on how slow matter would...
In my text, it says that the conservation laws alone do not suffice to predict the motions of two particles if the collision occurs in two dimensions. It is generally required that we know one of the final quantities in order to predict the rest. Does this mean that it is impossible to predict...