Recent content by asfd

How does ethic of science deal with experiences on humans like those where people get paid to take some new drugs? Isn't the respect for human being and its integrity something very important? Let's talk about that and tell me what you think.

Last semester we extracted caffeine from tea with CH2Cl2 and we were told it's possible to do the same thing with liquid CO2. This is interesting but pretty hard to do since you need high pressure/low temp in order to get liquid CO2. My question is: would it be possible to use liquid nitrogen...

Measured speed vs actual speed **very simple** If we measure the speed of a moving object with two movement detector positioned as on the atttached drawing, i.e. one is facing the movement and the other makes a slight angle with the movement, does the detector not directly in the movement line...

Youri takes a coffee and adds some milk at room temperature to it. Saku takes a black coffee and adds the same amount of milk but 10 minutes later. Which coffee is the hotter and why? I think that Youri's coffee would be hotter since the temperature variation is proportional to the...

I don't understand hLink how they get to the 3rd equation... I'm completely lost...

I'm a little confused here... I don't get how on this page: hyperphysics they get the first equation... I don't see the relativistic doppler effect written that way anywhere and I don't understand how they get ot that equation and how to expand it with maple...Anybody can help?

Doppler effect revisited Am I right when I say that the doppler effect formula "f=f0((v+vo)/(v+vs))" is derivated from the classical theorem of speed addition and this is why the doppler effect for light and EM waves is different?

Thank you for the informations

At school we extracted limonene from orange peels and we had to make an IR spectroscopy for it but I don't see anywhere how we can know the product has a ring constitution... I see a lot of information about aromatic rings but nothing for an alkene ring... Can anybody help me?

Last week I had a test in biology and our teacher asked us if we see any good side to viruses. I was so surprised by that question since he never talked about that... Anyway, I could only think of using viral vectors as a way to introduce genes possibly allowing gene therapy...

It does and I did manage to Display the scatterplot and fit curve but since I don't know how you call those Max-Min dots it's kinda hard to search for it...

I guess a dense grating would be better since we would get narrower stripes for each color thus minimizing overlapping and color addition... Am I right?

I'm quite a beginner in maple and I want to plots some points with a Scatterplot and add the bestfit curve but I can't get maple to put both in the same plot...:rolleyes: I'd also liek to know how to make a scatterplot with max/min extensions of evry points (I have no idea how you call these)...

We had a lab on diffraction (Young's experience and more) and we are now asked what would be better to decompose a non-monochromatic light: a denser slitted sheet or a less dense one? I really don't know how to solve this problem... it looks like I need more formulas than what I've currently...

You can forget about this"" i found the answer to my problem in an existing thing i can simply buy I'm having some keyboard problem so i'll end my post by thanking you anyway