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anyway (enough of my rant)...i did think many of these were simple...a few required some thought...and the majority couldn`t be proved either way.
Now, as to the universe stuff. I predict that in the next 50 years scientists will make discoveries that blow everything we believe right now out of the water. So go ahead and quote "Hubble" or Barney "Rubble" because their opinions are equally worthless.
First of all, we are reasonably certain that the universe had a beginning. Second, galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble`s Law," named after Edwin Hubble (1889-1953) who discovered this phenomenon in 1929. This observation supports the expansion of the universe and suggests that the universe was once compacted. Third, if the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins.
and if the universe is expanding, whats at the OUTSIDE of the universe, or is it just another demention?? or is it just blank, empty, lifeless space?
also the timetravel one, wouldn`t it be impossible to travel back in time at least, because if we could wouldn`t someone from the future have come and told us?! lol
1. AREA:infiniteThe hitch hikers guide to the galaxy offers the definition of the word "infinite"Infinite:Bigger than the biggest thing ever and then some. Much bigger than that in fact, really amazingly immense, a totally stunning size, real "wow thats big," time. infinity is so big that by comparisonbigness itsel looks a little titchy. Gigantic multiplied by colossal multilied by staggeringly huge is the sort of concept we`re trying to get across here.
because they actually awnser these stupid questions.
Sadly, Heisenburg`s Uncertainty Principle makes this impossible.
gravity pulls everything ecualy to the middle
Well in a manual gearbox the clutch is there so you do not wear out the gears when changing gears. The clutch disengages the engine from the gearbox so you can change smoothly into another gear. All though I believe there is an automatically clutch in an automatic gearbox so there is one needed in every gearbox just that in an automatic it done for you.
So yes a speaker is basically a large magnet, but not an ordinarilyone. It is an electromagnet so it can be turned on and off. There aretwo magnets in a speaker. One at the rear which is controllable andone on something called a diaphragm. This diaphragm moves when currentis passed through the electromagnet. This causes the diaphragm to makenoise. The current running through the electromagnet decides whatpitch the sound will be. So basically it is the movement of thediaphragm which causes the sound.
For light to be split into the separate colours (a rainbow) it needsto be at a certain angle before it will split. It is easy to see ifyou use a prism and a white light that only at certain that it willsplit. And being that rain drops are tiny prisms the light would haveto be at a right angle to split the colours.
Why does lightning go in lines? Surely the constant flow of water(i.e. rain) would make the electricity spread everywhere - electricrain, no?
Lightning being electricity it constantly tries to find earth, don`task me why it just does. So it will try to find the quickest andshortest route to earth hence the straight lines.
Why does glue dry clear---because white doesnt siut it. and when we dry up, we turn a different color, dont we?
It takes the path of least resistance - i.e. straight to the ground.
It doesn`t slow down because there`s no air drag in space!
According to what I`ve learned in science class, most chemical reactions are irrevirsible. Physical changes, like melting, are easily reversible. Both of these are kinda general though, but the question there is clearly faulty.
apparently we never "forget" anything we just dont know where to find it, so you do actually remember your whole life you just cant always find the mermories... according to our teacher
Isn`t that how automatic cars work?
It`s rare, the rarest metal, save platinum (?) ergo it costs lot, supply and demand
Candles burn because of a reactive gas which evaporates from the wax as it turns liquid, providing the fuel. Wind displaces this from the area of the wick, blows it off, so without fuel the fire can`t burn any more
That`s easy, gravity. Every molecule exerts a force which attracts other molecules to it, if you think about it in a model where there are no other forces the only logical structure that can be formed is a globe, small particles associate to make bigger blobs, which attract each other and so on and so on until you run out of material
We can remeber an awfull lot from our childhood, you just need a better memory que than "what can I remeber from my childhood". Specific sensory input, a certain smell etc can bring back memories you haven`t thought on for dozens of years