Science

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Whilst discussions and debates are encouraged, The AnswerBank reserves the right to remove answers that are deliberately misleading, e.g. by implying that a statement is a scientific theory or law when it is not, especially when such answers may impact personal health choices.

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liam_01

CAN YOU SEE A SATELLITE FROM EARTH?

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.

Banu

physics

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...

Best way to clean old coins

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...

jimzee4

Maths question

Factorise a^2(b-c)+b^2(c-a)+c^2(a-b) ^2 means squared Any ideas?...

Bazile

Statins

Was there a recent report in the papers about statins - a few weeks ago ? If so , what was the gist of it ?...

Any chemists out there?

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...

Are all the planets going to align in 2012?

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?

dibble1

vacuum

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?

My brother has been diagnosed with MND

How best can I help him?

sidereal day

Because the earths orbit is eliptical, wouldn't that mean that a sidereal day varies aswell as a solar day?

fao factor30

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

can you become blind for looking at the sun for 10 seconds directly

dozeydo

genetics and COPD

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...

nuclear fission and fusion

whats the difference, i don't understand . . . .

rov1200

Standing on the backs of Giants

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...

checking maths answers

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...

(2words) the size of a population occupying a certain size area

what is the size of a population occupying a certain size area

Inkie

What are the advantages and disadvantages of presumed consent organ donation ("opt out")?

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...

the astronomer who first said that the earth and the plannets revolved around the sun

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