Quizzes & Puzzles11 mins ago
Science
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I often gaze up at the stars and every once in a while i see a very small ''ufo'' travelling above sometimes they can be super bright or very dull and im pritty sure its to high for an areoplane.
Three charges 0.1 coulomb each are placed on the corners of an equilateral triangle of side 1 meter. If the energy is supplied to the system at the rate of 1 kW, how much time would be required to...
I've came across a jar of coins, both old and new and most of them are pretty grubby. You can make out details on some of them and the earliest one seems to be 1787. I remember from my childhood that...
Factorise a^2(b-c)+b^2(c-a)+c^2(a-b)
^2 means squared
Any ideas?...
Was there a recent report in the papers about statins - a few weeks ago ?
If so , what was the gist of it ?...
I've just done a load of washing. It contained nothing remotely red or pink, yet three items (two cotton, one nylon) that were previously white now have a pinkish tinge. The only item I hadn't washed...
Is it true that all the planets in the solar system will be in alignment in 2012, and if so will it have any effects on earth, such as on gravity or the electromagnetic field?
I don't remember being taught this but apparently liquids boil in a vacuum. Does this generate heat? If so why can't we harness this heat?
How best can I help him?
Because the earths orbit is eliptical, wouldn't that mean that a sidereal day varies aswell as a solar day?
thanks for all your help, the non calculator paper was hard, but not impossible, there was a question with a grid with stuff like x + y + z = 10 then x + 2y + 3z = 28 etc etc with a grid of 9...
can you become blind for looking at the sun for 10 seconds directly
Does anyone know whether there is a genetic predisposition for people to develop chronic obstructive pulmonary disease? I understand that approximately 30% of the population have a lesser ability to...
whats the difference, i don't understand . . . .
There has been a series of programs on Channel 4 this week about past scientists who have changed our world. Is there any living scientists who could be added to the program so that in 100 years time...
Factor, and anyone else good at maths, i've done some stuff but can you check them please, I would get my mum or dad or friend to but; i lost mum and dad with most my work in year 9 and my friends are...
Can anybody tell me the advantages of having a presumed consent law regarding organ donation where it would be taken for granted that each person would be an organ donor after their death? Can you al...