So...both strong force and weak force have mass?
Then, would it be appropriate to say that energy (exclude "dark energy" for the moment) has mass...and when sufficiently concentrated in space and time, manifests itself as what we consider, at present, to be matter?
So, If I take X mass of fuel and burn it in an enclosed glass sphere containing Y mass of oxygen...and assuming x+y=Z...after the burn (and the energy is released)...the net mass inside the sphere will now be slightly less than Z?
But...isn't it correct that exactly the same amount of mass and energy in the universe today as there was in the instant after the big bang?
So are you saying that, as the sun "burns" (fusing H into He) and releasing energy, the mass of the sun is reduced, and in fact, that missing mass is...
Time in the "eye" of a photon
Dumb question...but thought I'd throw it out there.
So, ever since I was a little kid of 6 or so, I loved to look up at the sky. I knew all those stars were just suns. I also knew I was looking back in time, many thousands to millions of years, since all the...
Matter can not be created nor destroyed..."in a closed system" ...and except where "energy transfers" are present. So, in a fusion reaction, energy is released; but mass is also lost. ?
Can someone/s just square this more a layman (me) so I can understand exactly what's going on? Thanks!
Max
Exactly correct. hp/kg ONLY matters when overcoming inertia or the pull from gravity. On the highway, on flat ground...it matters (essentially) zero. In certain cases, increased mass can INCREASE fuel efficiency though. But, you'd have to drive perfectly to achieve it...and be driving in...
Okay, so the scenario is a passenger car, traveling on the highway. As a general rule, I say that increased weight (mass) will have a beneficial effect on MPG (IF tire pressure is increased so that rolling resistance is reduced to compensate for the increased weight), ONCE the vehicle is up to...
Thank you. Interesting. I did not know the transformer at the pole works both ways...or that the 220vac at my house is on the same line as other homes on the street (possibly).
Note, this is in the USA, where the street lines are 4,800vac (I think?)...and the lines from the pole are 220VAC to the panel.
For example, let's say I'm making 225vac from a DIY solar array (connected to my main panel), and the amount of energy I'm currently producing is more than what...
Thanks Mentoric and Borek. Yea, all this time I've been just taking the "odometer" distance and the elevation gain and doing basic division (rise/distance)...like you said Borek, often the rise is gradual to the point that the difference isn't really much to worry about. BUT...my example was...
...I've been calculating this for years...but for some reason thought about it today, and am having a brain f#rt!
I suspect I've been mis-calculating all this time. Math help please to calculate PERCENT slope :)
Le's say I am driving (one way up a hill), and the following stats are the...
I'm thinking about all types of charging (LiIon, lead acid, etc.). I get the basics...but would really enjoy more info on the subject.
Also...one thing that confuses me is how you can "overcharge" a battery...and how you can supply too much current (amps) to the battery. Since its generally...
(that's Fahrenheit of course) For that matter...0 degree F aluminum cubes doesn't cool a room temp liquid as much. frozen H2O cools liquid off much much much much faster and more (in total temp drop terms) than equal surface area "cubes" of aluminum, cooled to -20C. (I've done the...
So many questions on this topic...but I guess the starting point would be to explain the reason for the question. That way, maybe someone can help me work backwards to answer the question...and thus I can apply that to other situations.
I have a friend who thinks he can make a personal cooling...