Quizzes & Puzzles0 min ago
Science
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Hi everyone,am new here,what a fantastic site,the answer to another topic prompted me to ask the following question. If the planet Earth was the size of a pea,how far would the nearest star be.I look...
I read something the other day which stated that the population of planet earth today is more than all the people who have ever died.....ever. How can anyone know this? And, what then, was the...
What is the common name fro group 18 of the periodic table, which includes Helium and Neon
Hi guys I was wondering if you could help. I am trying to understand what the level of significance is (e.g. 5%). What does it mean and how do you interpret it? I do not understand any of the...
All we hear these days concerns the need to cut co2 emissions to reduce global warming. In 1992 new cars had to be fitted with cats. (in the UK) so they now produce co2 instead of co. How is this...
Are these two products the same? I know that caustic soda is sodium hydroxide, so what is washing soda? In a previous AB question someone recommended washing soda as being useful to clean washing...
What is the possibility of 2 sets of identical twins producing 2 children with identical dna. (like if Jane & Joanne "marry" Tom & Tony could they produce "cousins" that were an exact dna match)
I believe time travel is possible. I dont understand how Einstein came up with these theories when he hardly understood the universe around us - like dark matter.
What are your views on the development and use of nuclear weaponry?
Apart from venus , is there any other planets in the solar system that is visible with the naked eye from the earth ? If yes , what direction do you need to look at the present time - taking the moon...
anyone tell me the name of the very bright star currently NW of the moon
how do you remove excess glue
How do humans interact with the rock cycle? this was a question in an exam and i wrote about geothermal energy and got zero marks. Thanks in advance.
I want to do a placement year next year in a lab and I have to write a scientific cv but I dont know how to!! Any hints?
Thanks.
What's the largest distance a spark can jump from an 11Kv overhead power line to a good conductor in credible UK weather conditions? I applied Paschen's Law, using the peak voltage and worst case...
Hi guys I was wondering if any of you has ever wondered what was before the big bang. Any suggestions welcome Many thanks Bart.
How many moons does the earth have? I know there is only one offical moon but I just want to know how many there are....
Could you please tell me if all materials are made of particles, thanks in advance
i need some help with this problem, i have to work out the percentage uncertainty for rho = (R * A) / L now the % uncertainty for A is so low it doent come into account but i have a %U of 3.26% for R,...
I used a soil testing kit in the garden to check for acidity. It had dip tabs and a colour chart for reading results. It could also be used for testing water, so I experimented. Ordinary tap water...