Quizzes & Puzzles0 min ago
Science
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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...
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...
One cell of Vibrio natriegens has a dry mass of ca. 10-12g (ca 10 to the power of minus 12) and the total mass of Planet Earth is 5.9726 x 1024 kg, Assuming zero mortality calculate in how many...
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...
University Challenge question tonight:-
What is the sum of one half, one third and one quarter?
Thank you...
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....
Q77 down - Sudden rise in river level (5) ?p?t?
I dare suggest that a warmer atmosphere is potentially capable of trapping more heat in the planet's mantle and crust increasing the risk of increased frequency of earthquakes, volcanic eruptions and...
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I'm enjoying following Tim Peake's mission via the Internet & the current Royal Institute lectures. They've briefly covered first aid on board but what would be the protocol, God forbid, should an...
whenever i am heating liquid on the stove, as i am cooking, there is not much steam. However, as soon s i turn the gas off loads of steam. Why?
This image from the Hubble shows a new born star with 2 jets of gas shooting out that look just like Light Sabres from the 'Dark side'...
My Dad is thirty years older than me. After an infinite amount of time will he still be older than me? My initial thought is that there's something self-defeating in the phrase "infinite amount of...
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I had always assumed that the shortest day had the latest sunrise and the earliest sunset. I have only just noticed that today is the earliest sunset, and on 21 December it is 2 later than today. And...
Galileo thermometer broke and liquid went on radiator and possible in the vents is my radiator safe to put on please...
Hi, My boyfriend is studying A Level Biology (as he eventually wants to train to do Physiotherapy) and he mentioned he'd quite like a large 'Human Body' poster to put on the wall to help him with his...
