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Why does light go through some materials and not others. A diamond is more solid than a brick and a slab of hard glass more solid yet the glass and diamond passes the light. (Dont say cos its...
So you have children. That could be an evolutionary failure for all you know. I never did have biological issue but what if I did something that contributed to our survival as a species later on?...
A mirror has 60 LEDs, each lasts 5000 hours on average. When, on average, will the first LED fail. Obviously it depends on the spread of failure rates. 60 candles would all fail at similar times. So...
Never mind , in a few years time we will have this sorted and it will be just like landing an aeroplane
http://www.bbc.co.uk/news/world-us-canada-32330383...
I know this is a really weird question, but could a human's body odor reach a "limit" in how badly/strongly it smells, reaching a point where there is so much bacteria in the skin/swear that the smell...
Am I going mad. My daughter tells me that there was a question today on the above paper as follows. Given a rectangle with a diameter of 12cm and shortest side x cm. Find the least and greatest...
I went to the doctor and he says I have scarring on the left ear drum. I found in the internet that this is called "Tympanosclerosis". I did not have middle ear infection before, but I had outer ear...
A mechanic has a set of 23 spanners
Is it possible to put them in a toolbox so that he has the same number of spanners in each part of the box?
Explain your answer...
Potassium nitrate is an ionic compound.
It contains potassium ions bonded with nitrate ions.
Explain why nitrate ions cannot form ionic compounds with bromide ions...
magnesium reacts with sulfur to produce magnesium sulfide A. State what happens when magnesium ions are formed, in terms of loss or gain of electrons. Give the name for this type of reaction B. When...
Potassium chloride is an ionic compound containing potassium ions bonded to chloride ions A. Name the force that holds the ions together in an ionic compound. State if it is weak or strong B. The...
Hi, The moon this morning was a descending crescent. Around midnight it was an "upside down" crescent, around 6am I noticed it was back it its "upright" position. I understand that it's the sun...
Is it possible to make a 50ml stock solution of iodoacetamide? We have a 25g vial of iodoacetamide to hand (in darkness!) and plan to use the solution on cysteine residues in peptide sequencing....