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joe1

Maths question

I am told that when spinning a coin there is always a 50/50 chance of a head or tail . So in 1000 spins there will be approx 500 of each. If there has been 500 spins and all are heads is the...

rov1200

Lifespan of a virus

On the TV yesterday viruses were seem swimming in a small pool of water trapped in a block of ice. They had been there for more than 1 million years. Do they live indefinately?

xvbn

Local Age Concern quiz

The average man's is 1.45 litres and a woman's is 1.3 litres-what is it?

charliechan

why can you never delete your facebok account permanently ?

who is behind facebook and why can people not completeley delete their account ? even when u send someone a pm it is allways stored in a database as it asked you do u want to " undo " the...

mollykins

on qi and in a book i'm reading, it said that Grahams number is so big that all the material in the universe couldn't write it, but what about computers, they've made pi into a number that takes up...

BertiWooster

Tree falling

I'll park this question here. If a tree falls to the ground does it make a sound if there is no one about to hear it ?...

R1Geezer

when something touches what is actually touching?

Eg take 2 snooker balls when we can see they are "touching", what is actually touching at a microscopic level? I mean we know that atoms are a nucleus surrounded by huge empty space with...

flobadob

Only athiests need reply.

If you don't mind answering this question, what religion were you before you became an athiest? With most people I assume you were brought into a family with some religious belief and decided to give...

eltelioni

Nearby planets - travel to and colonisation of

Continuing here because colinha's question is closed. (Why?) I don't agree that this has been done to death. Although there are practical difficulties with interstellar travel I see no objection to...

shakibaby

What is smallest structural and functional unit of living things?

EDDIE51

Gaia theory ! Global warming ?

This question is up for discussion ! just a few thoughts of mine, I would like other views. Suppose the Gaia theory is correct. Could it be that 'Gaia' realising that there are just too many people...

-llRocKKinGll-

about gravitational force

why at the centre of the earth ,earths gravitational force is zero?

Friedcheese

I need help rearranging this square route question please please please

I don't know how to type a square route sign so I will just type it into the equasion. Rearrange the equasion b = square route a/ed to make a the subject and the answer must contain no brackets....

joggerjayne

faster than the speed of light

So, to paraphrase the well known paradox ... What happens if you are in a vehicle, travelling at the speed of light ... ... and you turn on the headlights?...

AndiFlatland

Bubbles in drinks

When you open a bottle of beer, soda pop or champagne, there is an immediate rush of bubbles to the top of the liquid. But they keep on coming for many hours, and I was wondering if there is any...

tigerlily11

Nothing....

is there any such thing? I was listening to QI the other night and they seemed to think there isn't any such thing as nothing. I had thought this for sometime and had argued the toss with the boy for...

Peter Pedant

Maths: parametric eqns of a parabola

A variable chord of a parabola y2=4ax is of constant length 2a Prove that its midpoint lies on a curve given by (y2-4ax)(y2+4a2)+4a2=0. [S level 1965)

annecheshire

whyiswaterwet

Greg0986

The manufacturer of a family car gives the following information

mass of car: 950kg the car will accelerate from 0 to 33m/s in 11 seconds calculate the acceleration of the car during the first 11 seconds...

MrPahoehoe

Solving an equation (sorry, maths not science)

Hi. I was doing a percentage calculation (not really important) and was trying to work out how much of an additional substance on top of a known value, would equal 17% of the total. The formula below...

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