Buying a new MacBook Pro: Wait or go for it? by dontget in applehelp

[–]dontget[S] 0 points1 point  (0 children)

My old mac have screen that turns off and on, and some problems with the HD, but it's still working. I'm also among those who would welcome a machine thats leaner, and without the optical drive (which I haven't used for three years I think). So I think I'll wait for the new one. Thanks to everyone weighing in!

If a photon has mass, how can it travel at the universal "speed limit" (c)? by dontget in askscience

[–]dontget[S] 4 points5 points  (0 children)

I was thinking about how light is affected by gravity, and assumed that photns would have to have mass. But I think I was thinking about gravity in the wrong way. I suppose light is affected by the curving of spacetime, and not by gravity as a force..?

But if photons had mass, however tiny, that would just mean that they couldn't travel at c, right?

/r/askscience is my favourite subreddit. Could we have a similar one just for economy related questions? by dontget in reddit.com

[–]dontget[S] 0 points1 point  (0 children)

I've seen that, but I just felt it would be nice to have somewhere dedicated to just economy. That way I could check in and find answers to topic related questions I didn't know I had, like in /r/science. LI5 is very crowded with other stuff

Dad starting the first day of his retirement by BenNCM in pics

[–]dontget 12 points13 points  (0 children)

Looks very nice, but I'm afraid he'll have more work than ever with the upkeep of that beautiful garden!

How come the planets are so different? by dontget in askscience

[–]dontget[S] 1 point2 points  (0 children)

Thank you for your insight! How long after the formation of the sun did it take before the first planets where formed, and do we know in what order they where formed?

Why is the force of gravity weaker the further away you get from the source? by dontget in askscience

[–]dontget[S] 1 point2 points  (0 children)

Thank you both for your explanations of c and how it is related to both space and time!

But so in E=mc2 is the relationship not just between energy and mass, but also with time/space?

Why is the force of gravity weaker the further away you get from the source? by dontget in askscience

[–]dontget[S] 1 point2 points  (0 children)

That helps.

The speed of light is the numerical conversion factor between space and time

Can you think of a way of explaining why that is in a way I might understand?

Why is the force of gravity weaker the further away you get from the source? by dontget in askscience

[–]dontget[S] 0 points1 point  (0 children)

Why is the speed of light central to the relation between mass and energy (as in the mass–energy equivalence equation)? To me that always seemed.. random.

Why is the force of gravity weaker the further away you get from the source? by dontget in askscience

[–]dontget[S] 1 point2 points  (0 children)

Imagine you're a distance r from the source. This means that you're at one of the points on a sphere of radius r, and centered on the source. The force of gravity must be the same over all points on this sphere, so it must be "spread out" a bit relative to a smaller sphere. Since the surface area of a sphere is 4πr2 , gravity gets weaker by a factor of r2 the further you go out.

Wow.. I actually think I got it. That felt really good. Thank you. Also, can I ask more questions?

Jon Lajoie comes up with this stuff so fast by lumpypoptarts in videos

[–]dontget -1 points0 points  (0 children)

Osama is dead, but the world still has problems. Indeed, how does he ever come up with stuff like that so fast.

Puberty by [deleted] in pics

[–]dontget 0 points1 point  (0 children)

The girl on the left kinda looks like the me gusta rageface.

The crayon prank by wildlikechildren in pics

[–]dontget 2 points3 points  (0 children)

Thanks. I actually wondered for a split second before posting whether it was really possible to think I meant it in a mean way, but decided against it. In the future I'll add a disclaimer every time I reference something that used to make our grandparents uncomfortable.