The Lounge is rated Safe For Work. If you're about to post something inappropriate for a shared office environment, then don't post it. No ads, no abuse, and no programming questions. Trolling, (political, climate, religious or whatever) will result in your account being removed.
I recently bit the bullet and replaced my hard drive (actually I was forced to as the old one failed) I bought a (£70) SSD and installed everything I really need from fresh - it took a few days to straighten it all out what with updates etc - I even went Win 10, why not? All seems to be working fine as before except a lot faster! PS I also gave it a good clean out, the desktop is kept at floor level and sure does accumulate dust inside - I took off the CPU fan to clean it as the heatsink was literally solid with dust...
I had almost the exact same experience. The old HDD never failed, I just ran out of space on the system partition. Anyway, it was a great excuse to finally get a SSD especially since the price to capacity ratio is now reasonable. ($200/480GB for mine) I also went with 10 and really like it so far.
As for the dust, originally when I rebuilt, I just did a light dusting. Not long after getting 10 up and running, I tried out Minecraft, liked it, and bought it. The problem was after 10 minutes or so of playing, the system would just shut down. My suspicion of overheating was confirmed when I installed a hardware monitor that showed CPU temps of 270F! A thorough cleaning did the trick. The temps now never break 150F and it's much quieter! It's amazing how over the years, you just get used to the fan noise.
If (as often happens) we represent 'spacetime' as a flat sheet (usually black rubber with white grid lines) and the distortion of spacetime by mass as a large ball sitting on the sheet, we can show the effect of gravity by rolling a smaller ball along the sheet, which will accelerate toward the large ball, and (ignoring friction) collide with or orbit.
So far so good.
In this model the flat sheet is suspended in 'nothing'.
But, what if you 'zoomed out' and the sheet was actually curved? Imagine it is sitting on a massive sphere.
If the sphere grows, so the 'universe' will expand.
Indeed if the sheet itself were like the skin of a massive rubber ball, then this effect would be observed if the ball was inflated.
So what we call 'dark energy' could simply be the inflation of whatever it is that 'supports' the universe.
The turtles are sliding down the side of the shell.
This is like a fish trying understand gravity. Maybe the fish would imagine it as constant invisible water flowing downwards. Because the fish brain is created so it can understand and survive underwater environment it does not have the brain pathway to understand dry land.
A curve requires 2 dimensions.
You could plot a curve across the x and y, or y and z, etc
If you read only a single axis coordinates (for instance assign all x values the same and read a curve's Y, it is indistinguishable from a line)
A curve involving the 4th dimension is this:
An object accelerating in a straight line.
Translate axis where X is the distance travelled and y,z =0
Time is experienced differently as it speeds thus the 4th dimension and curve
If you ignore the relativity changes in time, all you see is the straight ray on axis X