Hi, I've recently found a ring in my parents loft. I'm pretty sure its not solid gold as its a really heavy mans signet type ring. The only marks inside are 18k and what looks like 725. I know silver...
Does anyone have this problem. I drive a vauxhall corsa and lately in the mornings only shortly after I start the engine up, the car slows down so much that I have to pull over, after maybe 5 mins the...
Does anyone know if you can get an infrared heat lamp bulb in a low energy version?I am needing one for some ducklings that are due to hatch in a week but the bulb i have got is very expensive to have...
I read a book and it said that because of there supierior bdy size to their wings, scientificly they can't fly. Can anyone tell me more about it? 'Cause I couldn't understand what it said.
Not my question but my 4 year old grand daughters, when a bird poo landed on the cover of her sand pit I had to quickly stop her from touching it and explained what it was, she then asked why is it...
I have been given 3 concentrations of Ti. (200, 500 and 720 micromolL-1) How do i find the percentage by weight of these 3 samples? RMM Ti = 47.88 (started as 50mg, added to 10ml nitric acid, 2ml of...
If light intensity is inversely proportional to resistance, then light intensity is proportional to current due to V=IR. So will a graph of light intensity v wavelength look the same as current v...
have some old (1940s) photos & would like to enlarge them on my PC , only they are very dirty . Can anyone tell me how to clean them up before scanning them . Thanks in advance Genny
What is the best way to accurately measure the wavelength of a light source that has been filtered eg. red light I have researched diffraction gratings - and found n x lambda = dsin(theta) where n is...
I want to start painting again and would love to paint a scene of some brightly/multicoloured houses/villas or really stunning beach houses. On your travels where have you seen such places, I'm...
i am starting university in october and i wondered what would be the cheapest way to travel by train from uni back home and visaversa. I will probably travel about once a month maybe more. Would a...
I currently have a 25 yr old Black and Decker mains drill and I think that it has passed it's shelf life. I have a B.& D. cordless but this is not upto 'real' drilling. Should I buy another mains...