Recent content by vitaly

Well, you'll be able to state its sex by knowing whether or not your karytope had (X,Y) or (X,X) sex chromosomes. As for the extra large chromosome, it could be that your karyotype shows a mutation, such as a trisomy disorder. Since you said it was an "extra big chromosome," it must be one of...

Okay, the fatty myelin sheaths that wrap around axons do not allow the sodium ions to diffuse into the neuron, thus inhibiting a neural response. But, there is a way to get around that. The gaps, or nodes of Ranvier, allow the impulse to travel hundreds of times faster because many parts of the...

I'm having problems finding whether or not a trig function is discontinuous or continuous. Besides graphing, I don't understand how you can tell. How do you know if a trig function is continuous or not, for the 6 basic functions?

You made a good point. AIDS has been known for a long time. I have a brand new textbook (recently published), and it states this: "SARS, AIDS, hepatitis C, and viral encepalitis are examples of recently identified diseases that cause sever mortality and morbidity and are currently on the rise."...

Why isn't it? The definition in my microbiology book is a disease 1) that has been recently identified, 2) that is reemerging and becoming more common, or 3) that is changing and becoming resistant to drugs. Am I misunderstanding the definition?

Hi, I'm trying to find the top 10 emerging diseases in the US and the top 10 worldwide. I've found lists of many diseases, including AIDS, SARS, etc., but I haven't been able to isolate the top 10 for either category. Does anybody know a site that provides a definite list for each category...

I don't know the freezing point, but you can probably find a table that gives you that data so you can check your answers. Also, you use t = 273.15 Kelvins because that is, in basic terms, the accepted unit of temperature in chemistry/physics, etc. You will use Kelvins in the gas laws...

Well you know a few things. You just have to put it all together. 1) The patient must receive AT LEAST 30 units. You use the "greater than or equal" sign. 2) Each pill provides 3 units of medicine. Thus, each type of pill is multipled by 3. 3) You need twice as many red pills as yellow...

This problem is really getting to me, and I don't know why... INfo: Pyramid, Side length = 300 ft, perpendicular height = 321 ft, and slant height = (work shown later) 1. Find the slant height. Round your answer to the nearest whole number. (slant height)^2 = (height)^2 + (.5(side))^2 =...

Yes, I've tried completing the square. I got a strange answer, however. I'm just going to have to ask my teacher for help. And thank you, master_coda, for help with number 2. The equation turned out to be 10^2/20^2 + y^2/12^2 = 1; where y = 10.4, which is the needed answer.

Here are two problems that stumped our entire precal class. And we have a test soon, so I would like to be able to know how to work these type of problems. 1. Write the equation of the hyperbola, x^2 + 4xy + y^2 - 12 = 0, in standard form. Okay, I know the formula needs to be x^2/a^2 -...

If the value under y^2 is greater, then it's going to be a vertical ellipse. If the value under x^2 is greater, then it's going to be horizontal. You can check by graphing and calculating the lengths of the major and minor axes. That should help you too.

Oh, and our textbook is a Conceptual PHysics book, and there is no math in it. so I can't really consult it. This isn't the first time I've received random problems I didn't know how to do.

I'm reading. I was able to solve the other 5 problems that came with these. But, these questions are due tomorrow at the beginning of class... Which means, we're not going over them.

I'm really lost on these 3 questions. My physics teacher decided she was sick of thermodynamics and gave us this packet over material we haven't covered yet, but she expects us to get it without any problem. I'm really stuck on these: 1. Assume that sodium produces monochromatic light with a...