Units are standards of measurement used for different types of quantities.
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How to convert lb/MMBTU to concentration?
This might be a stupid question but...
I am looking over this document for allowable emissions for PM particles in biomass furnaces.
They are given in lbs/MBTU, pounds per million British Thermal ...
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0answers
51 views
cgs Gauss' system of units
I had never seen this system until today, and I'm really confused. I've read the wikipedia article about it but I still don't know how to change between this and the international system. For example, ...
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Units and use of the formula of the angular acceleration? [closed]
Question: On my document, it is written:
Angular acceleration:
$$ \frac{d\omega}{dt}=r\times \alpha $$
What are the units please?
What are $d \omega$, $dt$ and $r$?
I already know that $\alpha$ is ...
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65 views
I'm having trouble understanding the dimensions of this falling body problem
I'm working with this:
A 50 kg mass is shot from a cannon straight up with an initial
velocity of 10m/s off a bridge that is 100 meters above the ground.
If air resistance is given by 5v ...
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1answer
174 views
What is the difference between “in-plane shear modulus” and “shear modulus”
In the wiki it is article only about shear modulus and it is written that it's unit is Pascal.
At the same time in all researches about Red Blood Cells shear stresses, authors write "in-plane shear ...
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2answers
82 views
Dimension analysis of de Broglie equations
One form of one of the de Broglie's equations is this:
$\lambda = \frac{2\pi\hbar}{p}$
Units:
$\lambda = [m]$
$\hbar = [Js]$
$p = [\frac{kg m}{s}]$
$J=[Nm]$
How can one show with dimension ...
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1answer
86 views
Gaussian Unit of Charge and Force
I just read that in the Gaussian Units of charge The Final equation in Coulomb's law is as simple as $$\boldsymbol{F}=\frac{q_1q_2}{r^2}$$
No $\epsilon_0$ no $4\pi$ like you have in the $\mbox{SI}$ ...
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1answer
120 views
Four momentum of a photon squared, trouble with combining wave-particle duality and energy-frequency relation
Since $p^2=E^2-\vec{p}^2=m^2$ and
$E=h\nu=\frac{hc}{\lambda}$ and
$|\vec{p}|=\frac{h}{\lambda}$
we have that
$p^2=\frac{h^2c^2}{\lambda^2}-\frac{h^2}{\lambda ^2}$
If I go to Planck-units ...
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1answer
434 views
Question Based On Units And Measurements Involving Lengths [duplicate]
The below is the sixth question of the very first chapter from halliday and resnicks fundamentals of physics text,which i'am not able to comprehend.
Harward Bridge,which connects MIT with its ...
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4answers
575 views
Why there is no “Edison” unit in physics? [closed]
In the popular culture the XIX-XX century competition between Thomas Edison and Nikola Tesla is well-known. The example could be the Prestige movie, where there are some "Edison's agents" who sabotage ...
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2answers
193 views
Is there a named unit that, when divided by 32, gives meters per second?
I am receiving unknown units of speed from another system. I must divide the value by 32 to get meters per second. What units do I use to refer to the values I'm receiving? Is there any such unit? Is ...
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3answers
270 views
Help getting the distance an object has moved
What is a distance an object went through at the speed of 14hm/min for 6 hours?
I am having problems with conversions.
First, I tried passing 14hm/min to m/s. I did it alright. But now I am unsure. ...
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2answers
82 views
Which units has the relation $E=mc^2$?
Fast everyone knows the relation $E = mc^2$ but I still ask me, which units the relation has.
$c$ is the velocity of light. It means, a constant, isn't it? We therefore just have the relation $E = ...
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2answers
71 views
What Physical Quantity has SI Unit $kg \cdot m$,? [duplicate]
What is the physical quantity that has SI (System International) unit of $kg \cdot m$ (kilogram meters)?
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2answers
2k views
Unit for Impact Force
Forgive me if this is a newb question but I am not a trained scientist, much less a physicist. I'm just curious and would like to know if there's a unit to measure impact force.
I know the newton is ...
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1answer
174 views
$E=mc^2$ why is it $c^2$ and not just $c$?
Why is constant for the conversion of mass to energy square of the ligths speed? is it bedside it's the fastest real matter?
