Quizzes & Puzzles16 mins ago
Science
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why don't insects drown when walking on ponds
What exactly is gelatin? Is it the same as glycerin? Is there such a thing as vegetarian gelatin?
I been watching old episodes of Space 1999 (reliving my yourth and all that:)), and I was wodering does any one know what effect it would have on the earth if for some reason the moon was blown out of...
Is sex dangerous in the early stages of pregnancy? What are the risks?
Thnx in advance
any chemists that could help me here? what is the scientific name for a compound that is sometimes called "greenium" for school purposes. It turns black when heated, and loosed around 2g of its...
Increasingly we notice plastic bottles being marked as 12M or 24M alongside the recycling symbol. Is this a reference to the plastic density. Does it affect its recycling properties (we put them...
is it theoretically possible to replace the fridge compressor with a heat source (as in a gas or propane fridge) without changing the freon gas to ammonia/hydrogen?
What chemical would change the atmosphere as to make the air unbreathable?
recently on a trip to germany the temperature was rugularly below 0?c but i said to my fellow travellers that it felt not as cold as home when it is below 0?C how could this be ?
what is the star constellation outside of my house ? there are seven stars in it , one in each corner , and three across the middle . tried to draw it for you , but answerbank said no . I feel i...
Heres something that got me thinking... All numbers can be halved - 100; 50; 25; 12.5 etc... Now, assume that 2 marbles are rolling towards each other - 1 meter apart - 50cm - 25cm etc. At what point...
I have got stripes / bands running vertically down my fingernails ( darker in colour than the rest of the nail ) If I move a finger across the stripes/bands I can feel that they are slightly raised...
I noticed on day a few months ago that the moon and the sun were both visible. Now I know the moon gets its light from the sun. The reason we have half moon and so on is because of the earth blocking...
So there is an advert on the vision box right now, where a famous ex footballer, and a bunch of merry men, get into some boats and drag our country to the bahama's. (for a famous crisp manufacturer)...
Your team has been hired by an oil drilling company to solve a problem.� They need to weld a copper ring inside a long steel pipe which has been inserted into an oil well.� They are able...
I've been thinking, how much energy does it take to make, transport and install a wind turbine and all the associated cabling etc. compared to the amount of energy they will produce over there...
HI All I am a little confused. How can an element exist in 2 different states. For example Selenium can be either a red powder(or crystals) or a metal. How is this possible? I have also heard that...
I have noticed lately that a lot of candle makers are advertising that their wicks are lead free. Is there a lot of lead in old candles, and does it pose any real risk, or is this just another...
One for the botanists: Most football stadia are used so regularly that the pitches are marked out continuously from September to May. As the whitewash used must reflect almost almost all of the...
Does anyone know how much CO2 is emitted in the course of generating 1KW of power at the point of consumption (including distribution losses).. Gas and/or Coal generation would help.