grayfalcon89

Here: http://www.extension.harvard.edu/2005-06/courses/mdsc.jsp There are very many courses.. But I'm not sure which one I should choose and how much it will help me. Since you're on PSU, did you go through the Early Acceleration Program? I think that's 7 or 8 year program for medicine. That's what I'm trying to do. Anyway, do taking Harvard class help me? I don't know if I'll do this.. It sounds very attempting but I really need to get good grade on SAT AND maintain good GPA. Currently, I have one B due to English class but I still have 8 weeks to make it up (AND I NEED TO!! I HATE THAT CLASS!!!!) It's pretty hard to get very good job on SAT though.. (sigh)

Can this be an answer (I like the second response though.. but I have no clue on how my class would've talk about this.. :-?) If you soak steel wool in oil and not discard it properly, it may undergo spontaneous combustion. I remember reading these in many labels. Or is it soaking in water..? I know it's either of them. Can anyone clarify?

Here is my question.. How would regular steel wool go under spontaneous combustion or simply combusts by itself? I mean that you can't like burn it in the lab or throw it to the fire. This was the question in last exam. If it helps (it didn't help me; my teacher told us the "translated" version of the question), here is the original question. Under what conditions might iron (steel wool in this case) undergo spontaneous combustion? (If you are reasoning clearly from what you have observed and predict a logical answer to this question, your teacher will verify your answer with a sparkling demonstration). Thanks for your help!

Hey... I was reading the health journal that I received in past (I got them couple months ago but didn't read them till today:D ) and faced on these three questions that were classroom type. First, "Exposure to PASSIVE smoke can cause the same kinds of health problems that smokers may experience." I wasn't techincally sure about "PASSIVE" but I don't think this is a proper word. Maybe the correct word will be "secondhand"? In the next page, there was a chart with the list of couple famous carcinogens which are supposed to cause cancers. But one description does not sound right. "CARCINOGENS in cigaratte smoke pass into the blood and combine with hemoglobin, preventing red blood cells from carrying oxygen." Okay, I know that carcinogens cause cancer and act as stimulant but I thought CARBON MONOXIDE was the one that interferred you from breathing. Am I wrong or the journal is wrong? This is interesting.. Last, smoking increases blood pressure, which leads to an increased risk of STROKE. Hmm... I remember hearing that smoke increases your heart rate.. Indeed.. I'm not so much familiar with the term "stroke" so is this "increased risk of "stroke"" same as the increased heart rate..? Thanks for your help. It's fun to read these journals but I always want to see if I can point out any "incorrect-looking" informations.

Say you have three sides of a right triangle that form an arithmetic sequence. The only possible one is 3-4-5. Prove this.

YESSS!! Thank you!

I'm learning about nicotine, tobacco, etc but my assignments cannot be found in my book. I'll put my "guess" below every question because I did attempt every one of them. 1. The lungs' air sacs are destroyed, making breathing extremely difficult, in the condition called A. emphysema B. coronary heart disease C. chronic bronchitis D. lung cancer My guess: Emphysema.. But emphysema has to do with alveoli so I'm not sure. 2. Nicotine contributes to plaque buildup in blood vessels, increasing the chance of A. lung cancer B. diabetes C. hardening of the arteries D. oral cancer My guess: Increasing of blood vessels is caused by nicotine, which causes lung cancer. So, I'll guess with A. 3. The FDA has approved a prescription nicotine nasal spray for use as a A. nicotine deactivator B. nicotine substitute C. nicotine enhancer D. nicotine antitoxin My guess: Only word that appeared on my book was "nicotine substitute" so I'm going with that. 4. Smokers may have trouble keeping their respiratory tracts clear because cigarette tar A. contains carcinogens B. is a stimulant C. paralyzes cilia D. unites with hemoglobin, preventing red blood cells from carrying oxygen My guess: The choice D is about carbon monoxide and B is about nicotine. I think tar itself IS a carcinogen and since it interfers with breathing, I'll guess with C. 5. A social benefit of quitting smoke is A. a reduced chance of stroke B. an increased cardio-respiratory endurance C. a reduced chance of heart disease D. the saving of money for other activities My guess: I don't know anything about "stopping smoke" increases anything "practically." Your chance would've stayed "HIGHER" if you didn't smoke. The only choice, in my opinion, that will surely work is D since tobacco is pretty expensive. 6. When quitting smoking, a stress management techniques can A. prevent emphysema B. reduce peer pressure C. help the person through the nicotine withdrawal process D. be a nicotine substitute My guess: I never saw this word before but I'm guessing since "quitting" smoke causes a lot of pressure, I'm going with C. 7. Nicotine causes addiction and A. acts as a stimulant B. is a carcinogen C. competes with oxygen D. destroys cilia My guess: Very tricky.. The best one I think is A. But I'm not sure. 8. Breat milk from a mother who smokes contains A. tar B. leukoplakia C. tobacco juice D. nicotine My guess: D is my best choice.. A seems to be "bit odd" and B is a disease so thta one seems to be peculiar as well. C is bit funny so I'm ignoring it. Thanks for all your help! Hope at least one of my guess is right.

I don't understand the point you're trying to make. According to what I hear, MCAT is not an easy test to take (difficulty) and you have to do *quite decent* to get into medical school from college. So, why don't I just find a way that will get me to qualify earlier so I don't have to worry about it?

Hi, I'm sophomore student who wants to become a doctor. I have few ideas on colleges but I want to see more options. If you know any good medical school or accelerated program, please post here. Thanks.

I'm guessing since angle AB are supplementary and you have cos x = - cos (180-x), you can probably brute force to get the desired expression. Not sure about it though. Haven't worked the whole problem out.

Oh okay. Oh by the way, was my work right? (The part about finding the moles of two reactants being 0.002 mol; I wasn't sure about this because I didn't get limiting reactant. :-O)

Okay. This is so peculiar that I have to ask about it... From [math]M_1 V_1 = M_2 V_2[/math], I assume the molarity for both [math]M_1,M_2 = 0.50[/math]. So, letting x = V_1, the problem trivializes because this gives x = 0.008 - x which gives x = V_1 = V_2 = 0.004 liters. To find the numbe of molarity, we multiply this by 0.5 which gives 0.002 moles. Now, here is the peculiar part. The coefficient is same and the number of moles is same.. So, there is no limiting reactant!!! Anyway, if I set one of them to be the "known" and [math]Pb(CO_3)[/math] be the unknown, I can set up the ratio: [math]1/0.002 = 1/y[/math] where y is the number of moles for [math]Pb(CO_3)[/math]. So, the predicted number of moles is 0.002. But this is weird because if you solved for [math]NaNO_3[/math], what happens it that you get 1/0.002 = 2/z and this tells z = the number of moles for [math]NaNO_3[/math] = 0.004. But then this means the products have 0.002 + 0.004 = 0.006 moles and by the Law of Conservation of Matter, this is a contradiction. What did I do wrong?

I have two questions on chemistry. We recently did a lab on MOLE RATIO AND CHEMICAL REACTION. What we did was observed the precipitate that was created from combining [math]Pb(NO_3)_2[/math] and [math]Na_2 CO_3[/math]. The balanced equation for this chemical reaction was: [math]Pb(NO_3)_2 + Na_2 CO_3 \rightarrow PbCO_3 + 2NaNO_3[/math] Okay.. So, using limiting reactant and other things, I was able to predict the number of moles of [math]PbCO_3[/math] that was resulted. But I can't find the answer to two questions that followed it (I have approaches but I don't know if this is right..). We used [math]0.50 M[/math] for molarity (the concentration of solution). 1. Describe how you would verify your predictions. My answer: I will go back to my lab station and find the volume of the precipitate in ml. This is easy since the sum of the volumes of [math]PbCO_3[/math] and [math]NaNO_3[/math] is 8 throughout the lab. Now, converting 8.00 ml into liters, we get 0.008 l. Since the product of molarity and liters equal to the number of moles, we can find the number of moles by multiplying 0.008 liters and 0.50 M to get 0.004 moles. I thought this worked out but my teacher looked at me puzzled on this. Also, my friend must've did something else because he told me that he used [math]M_1V_1 = M_2V_2[/math] or something. Any idea on this one? 2. Though you measure precipitate heights in this experiment, what property of the precipitates were you measuring indirectly? My answer: I'm guessing it's volume because although we did write the height in mm by ruler, we used the volume of each [math]Pb(NO_3)_2[/math] and [math]Na_2CO_3[/math] in beginning to form precipitate so I'm thinking that the answer is VOLUME.. Thanks for all your help! And go Latex too!

Thank you!

This is pretty simple questions but I can't think of a word to describe it. 1. What appears on the underside of fronds as a brown spot; a clump of sporangia. I'm guessing it's sori but is word "sori" singular or plural? Or am I off the track? 2. A new born baby, literally. ? I have no idea on this. It's 7 word and I so far got: n _ _ n _ t _. But not sure what to put between them.

Okay. I recently read about fungi's sexual reproduction and aseuxal reproduction. But I do not get a single thing except on the part where asexual reproduction, something like spore occur. Can anyone help me understanding this? Like I know what sexual and asexual reproduction is. I just don't get when it came to fungus. Thank you!

Thanks to all your replies, I found the answer for the Latin. Just in case, this might be useful in the future to anyone , I'll post what I have. *In 1796, a guy named Edward Jenner used the cowpox virus on human to build immunity for the smallpox. While doing this, he called the material he used vaccine, which came from Latin word vacca , meaning cow.

Sorry.. I didn't mean to post homework but i wasn't on the class for the last question (latin one) and I wasn't sure for #1-3. I think I know now for #1-3. Hmm.. Bit explanation for #4..

I'll take chemistry next year and hopefully, it's bit more fun than biology now because even biology is okay, I would hope chemistry is little bit better since a lot of math is involved. But I don't know any of the competition of chemistry. I heard of USA Physics Team or AMC (American Mathematics Competition) for math but what about chemistry? If anyone knows about it, please post here so I can know about it. Thank you!

Here are four questions that I need help on.. I really can't think much.. Thank you very much for your help! 1.What unique ability to bacteria posses in regards to gaining additional DNA? My answer: All cells are clones of each other, and all cells respond to environment in same way. 2. In the lab on simple staining, we pass the slide with bacteria through the fire. What was the purpose of it? My answer: Since we want to observe the bacteria in the stain, we want to do it when it's killed --> and flame kills it. 3. In the lab on simple staining, some of the stain remain on the slide while the slide was rinsed. Why? My answer: Some of the stain remained because bacteria absorbed them? 4. Why does word vaccine come from the Latin word for cow? My answer: ?

I just heard there is physics olympiad in this country (I'm talkin' about US). But I'm not sure what do you do or other stuffs.. I heard first round is multiple choice exam for 40 min and then second round for open question and then sending to "real" olympiad.. Can anyone tell me more about it? Thanks.

I heard something called genital wart.. I now know what it is for details but I'm not sure when it was identified.. >.<; Any ideas on "when"? (first identified)

I think this has to be placed on the Medical Science forum but I'm not so sure on where (probably Genetics) but I want to be sure. Like the title mentioned above, I have several questions. I'm doing a research on the human papilloma virus. I found that this is the cause of genital warts (or veneral warts) which occurs in humans (both men and woman). For men, it occurs near penis while for women, it occurs vaginal lips, inside the vagina, on the cervix, or around the anus. This disease is afffected, or more likely transmitted, through the sexual contact. Its effect is that it causes cervical lesions and increase risk of cervical cancer. Its genus is papillomavirus and family is papillomaviridae and the virus is DNA. I'm not sure when was the genital warts first identified, however. This doesn't seem to be on the texts I read and at least, since my computer is down on search engine (thanks a lot, viruses), I'm able to go to the sites that I type the URL (like this one) while I can't search say "Genital wart" on the google. Can anyone help? Thanks

I'm not sure the difference between archaebacteria and eubacteria? Also, what is the difference between those two and protista? This is kind of stupid question but I have trouble on separating them from six kingdoms, which my bio book provides. EDIT: The book provides six kingdoms as: eubacteria, archaebacteria, protista, fungi, plantae, and animalia.