police discolights
My latest curiosities:
Could we have explored space without Einstein's theories? Or was the relativity theory essential for humans to get off the planet?
What is the deal with the growth of secularism, science and technology and the continued reliance on religion? I need a complete history of humans and their beliefs in metaphysical entities cause it all just boggles my brain.
Why do some people insist that only cold water should be added to a pot for purposes of boiling - doesn't it make more sense to put in the hotest water possible? Do these people think it is more efficient to fill ice cube trays with hot water before putting them in the freezer?
Could we have explored space without Einstein's theories? Or was the relativity theory essential for humans to get off the planet?
What is the deal with the growth of secularism, science and technology and the continued reliance on religion? I need a complete history of humans and their beliefs in metaphysical entities cause it all just boggles my brain.
Why do some people insist that only cold water should be added to a pot for purposes of boiling - doesn't it make more sense to put in the hotest water possible? Do these people think it is more efficient to fill ice cube trays with hot water before putting them in the freezer?
posted by Meghan at 6:07 PM
5 Comments:
Einstein's relativity theory is used for fixing Newtonian mechanics at high velocities. By "high
velocity", the speed of rockets are not meant here, the speed under
question is -really- high speeds, like light speed and "close to light
speed". So until we invent "warp engines (star trek)" that would take us to that kind of high speed, we will be fine with good old Newtonian
mechanics, so we don't really need Einstein's theorems for current space travel conditions. Also we still do not use nuclear engines too, so E=mc2 is not still in use for this kind of space travel yet.
Using cold water is not because of efficiency, it's obvious that boiling hot water would be faster and more efficient. But, if you'll be drinking or cooking with that water you wouldn't want to use the hot water that comes from the tap. This is because, the tap hot water is heated long before you get it out, and been sitting inside the pipes, getting stale.
You'd prefer to use fresh, non-stale water; in this case you'll go with
boiling the cold water which comes fresh.
And for science, technology, secularism and religion. No good answer really; humans just didn't grow up yet I guess.
i think i actually remember hearing in like the 4th grade or something that hot water freezes faster than cold water. it's some sort of freak thing. perhaps i will perform a science experiment and get back to you on it.
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