Mr Rayon

Is it possible to grow any plant in Mars?

Are there any books/resources out there of some common classroom biology experiments for high school students. It's just that often we do a lot of practical work followed up by questions for assesement. It would be great if I could come up prepared in class before doing any experiment by knowing all the things I should expect/find interesting. Sometimes we also write practical reports instead of answering questions so knowing more about the experiment and why it occurs the way it does will give me more to discuss and potentially increase my marks. Our textbooks tell us nothing of any experiments so it's impossible for me to be 100% prepared and I was just wondering if the information is out there. Any help would be appreciated and will help out immensely both for this year as well as next year!

http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=10668231

How much protein should you consume from one sitting to take the maximum benefits of the protein available? I've been told that if you eat too much protein some of it will be converted to fat...so how much protein should you consume in one sitting to not convert any to fat?

Stop speaking in riddles and help me. If you know what these observations were then I didn't really need to research, did I? I'm not lazy, I tried for 20 minutes and my internet is slow.

Fe3+(aq) + SCN- (aq) <==> Fe(SCN)2+(aq); exothermic 1) Half-fill two semi-micro test tubes with Fe(SCN)2+ solution. 2) Place one test-tube in ice-water. Carefully heat the other test tube until the solution almost boils. 3) Compare the colour of the mixtures in the two test-tubes. Recrod your observations. H3PO4(aq) <==> H2PO4- (aq) + H+(aq); exothermic 1) Pour 1 M phophoric acid into each of two semi-micro test-tubes, to a depth of about 3 cm. Add two drops of methyl violet indicator to each test-tube. 2) Place one test-tube in ice-water. Carefully heat the other test-tube until the solution almost boils. Record the colour of the indicator in the heated and cooled test tubes. 3) Note the acidity of each solution. Methyl biolet indicator is yellow in solutions with a high concentration of H+(aq). Its colour changes through green, blue violet as H+(aq) concentration reduces. N2O4(g) <==> 2NO2(g); exothermic 1) Carefully place one of the stoppered test-tubes containing an N2O4/NO2 gas mixture in a beaker of hot water for about one minute, holding the stopper firmly in place. Place the other tube in a beaker of ice-water. 2) Remove the test tubes from the hot water and ice-water and immediately compare the intesities of the brown colour in the tubes. Record your observations. My question is: Does anybody know what these observations are (the colour changes of solutions in each semi-micro test-tubes)? This practical activity was done whilst I was away from class and I must do a practical report on it. None of my classmates recorded the results (or remembered them) and my teacher does not have the results. I'm guessing at least some people would have done this experiment here. If anyone could help out it would be appreciated!

that's like saying there's no cure to cancer. It could be beneficial we just need to find in what way, in fact I bet in the future everybody will be drinking their urine. :Drolleyes:

Is this because of a lack of research conducted? Have there been many attempts to find any health benefits from drinking one's own urine?

Is it true that drinking your own urine is healthy? My friend says that there are many health benefits from doing so. initially i didn't believe it but after surfing the net a little, i 've found a lot of sites supporting this idea. so, what's the general consensus among SFN?

Increasing the temperature in step 1 increases the yield of products. But in step 2 of the Ostwald process, why does decreasing the temperature increase the yield of products?

1) If something causes an endothermic reaction does this always cause a higher yield in products if the temperature is raised? 2) If something causes an exothermic reaction does this always cause a lower yield in products if the temperature is raised? This is not homework, I'm just researching the Ostwald process and had some general questions.

thx man, will check them out!

Hi there! I want to do the 40 hour famine this year (for the first time, shamely). Do you need a credit card to do it? How does fasting help the people in need? Where does this money come from? Is it your money? Anybody else doing it?

If oxygen is responsible for aging, wouldn't running, jogging or any cardiovascular fitness exercise make you age faster?

I have plenty of muslim friends who respect both men and women equally. You should not make such generalizations based on minorities belonging to a particular group and assume what goes for them goes for the whole group. It's quite offensive.

Is it true that masturbating decreases your chances of getting prostate cancer? If so, how? Are there any theories on what causes prostate cancer?

Wow, what a long and detailed post! Thanks for that! How quickly can you read? In about two month's time I'm going to do a very important test that would require a fair bit of reading. Do you think this would be sufficient time to become very fast at speed reading? Merged post follows: Consecutive posts mergedCould watching foreign movies with subtitles help with speed reading in anyway?

If I find a away to cheat and get away with it, I would. But this requires the correct amount of motivation, so only for important possibly life-changing tests that aren't conducted properly.

yeah, i heard oxygen acts as free radicals inside our bodies causing havoc to every single cell, tissue and organ. It is even suspected of being the cause of aging and death! However foods high in antioxidants such as vitamin C help neutralise some of these, thereby making live longer! Woohoo! Go free radicals!

How long does it take to learn how to speed read? I've never learnt how to but I am deeply interested in increasing my reading speed from your average 125-250 wpm to 500-1000 wpm without decreasing comprehension. How long does it usually take to learn how to speed read? Have their been any scientific tests on this?

yeah, sorry i'm not sure why but once I posted it the picture changed and moved towards the left I can't make the hydrogens stick.

nah, i'm still not seeing it. could it be because of the uneven distribution of electrons in the -OH? Oxygen is more electronegative and hence the electrons shared between the OH would spend most of their time around the O, possibly affecting the overall shape of the molecule and thus how we position the OH? So, just to confirm, below is the more correct way of drawing ethanol as opposed to the one above? H H H | | / H-C-C-O | | H H (soz, don't know how to supply u guys with a better picture)

Ok, thanks for the help!

c | c - c - c | c Just started organic chemistry in high school. In the above diagram there are three hydrogens hanging off the four outer carbons. Is the answer 2,2-dimethylpropane or 2-dimethylpropane? edit: hold on those 2 carbons- the one at the top and the one below is supposed to be attached to the middle 2nd carbon of propane but I can't draw it properly for some reason.

H H | | H-C-C-O-H | | H H How is this diagram incorrect? I think it has something to do with the O-H, but can anyone confirm this? If so, why?