Search results

  1. V

    Homework Grades:K-12

    There kids in high school already taking advance math and science courses so thats where im comming from, high school algebra II for exa is pretty much the same as college algebra, concepts such as factoring a cubic polynomial doesn't change. Same with high school physics courses, problems...
  2. V

    Tangent Lines

    I did that and I got something like 1/2*Sqrt(a) by taking the lim as h->0, giving a slope of 1/4, but the answer is sopposed to be y=(1/20)*x+(1/5) can you please show me how they got this ? By the way is that factor you posted called a conjugate ?
  3. V

    Homework Grades:K-12

    Whould you like to see this part "Homework Grades:K-12" of the forum removed, why or why not ?
  4. V

    Tangent Lines

    I need to find an equation for the tangent line to the graph of the function at the specified point, I had some trouble simplifing f(x) so that I can take the lim as h->0 which is the slope. f(x) = Sqrt(x)/5 at (4,(2/5))
  5. V

    Tangent Lines

    I need to find an equation for the tangent line to the graph of the function at the specified point, I had some trouble simplifing f(x) so that I can take the lim as x->0 which is the slope. f(x) = Sqrt(x)/5 at (4,(2/5))
  6. V

    Significant figures

    How many significant figures should be retained in the result of the following calculation. (11.13 - 2.6) * 10^4 ----------------------- (103.05 + 16.9) * 10^-6 is it 1 , 2 , 3 , 4 or 5 ?
  7. V

    Significant figures

    How many significant figures should be retained in the result of the following calculation. (11.13 - 2.6) * 10^4 ----------------------- (103.05 + 16.9) * 10^-6 is it 1, 2, 3, 4, or 5 ?
  8. V

    Clock_t start, stop in C

    What about running the program in while booted dos mode, would it be accurate it that case ? How would I use a windows api with turboC, are there any other methods for counting microseconds in turboC ?
  9. V

    Determine the velocity of an electron orbiting an atom ?

    Is it possible to determine the velocity of an electron orbiting an atom ? Would the velocity be greater for an atom with more mass ?
  10. V

    Clock_t start, stop in C

    Im using turboC so I don't have that fancy rtc.h library. What about counting how many seconds a longer {loop(containing var=var+1) while var<1,000,000} will take using clock_t and then... dividing by the number of seconds for the entire sequence by 1,000,000 to get the number of seconds it...
  11. V

    Clock_t start, stop in C

    In this program im using I first declare clock_t start, stop then later position start and stop in a loop. To count how long a switch is turned on. The smallest value I see outputed is no lower than 0.05 sec but I want to be able to count miliseconds. printf("pulse length is %f seconds\n"...
  12. V

    Law of multiple proportions

    Sulfur forms two compounds with fluorine. In one of them it is observed that 0.447 g of sulfur is combined with 1.06 g of fluorine while in the other, 0.438 g of sulfur is combined with 1.56 g of fluorine. Show that these data illustrate the law of multiple proportions. would...
  13. V

    Screws and gears

    Must they heat the sheets like red hot when they stamp them out, making the metal easier to shape when forming them into gears ?
  14. V

    Screws and gears

    How are those tiny screws and gears manufactured, do they have some kind of crucible prepared and pour molten metal in them ?
  15. V

    Why grapes don't mold

    Can consuming fungi be hazardous to ones health ?
  16. V

    Why grapes don't mold

    I left some strawberries for a little over a week in the refrigirator and I noticed some white fungus like stuff on them, what is that stuff, how come this doesn't seem to happen to other fruits like grapes ?
  17. V

    Poisson Approximation to Binomial

    n=10, p=1/2, x=1, mean=n*p= 5 using the poisson formula i got 3.4% using binomial formula I got 1% using (mean)+/- 2(standard deviation) i got 8.4 - 1.8 I dont know If its right, confused because should'nt the binomial furmula give the answer within the maximum and minumum usual values ?
  18. V

    Poisson Approximation to Binomial

    For a binomial distribution with n=10 and p=0.5 ,we should not use the poisson approximation because both of the conditions n>=100 and np<=10 are not satisfied. SUppose we go way out on a limb and use the Poisson aproximation anyway. Are the resulting probabilities unacceptable...
  19. V

    If you could live forever, would you?

    It whould be a privilege to have everlasting live, considering all of those who died before us.
  20. V

    Ocean waters

    why is sea water salty ?
  21. V

    Are there any seasons in regions along the equator ?

    Are there any seasons in regions along the equator ?
  22. V

    Careers in science

    What do science majors do when they finally get their diploma, how is conducting research like, how is job availability, pay like ? What kind of work do people holding an S.D do ? Read what physics professor Jonathan I. Katz has to say ! http://wuphys.wustl.edu/~katz/scientist.html [Broken]
  23. V

    How oxygen is released as a byproduct of photosynthesis

    You know how oxygen is released as a byproduct of photosynthesis by plants, how does this affect the amount of oxygen in the air in the winter season in the areas when all plants are frozen ?
  24. V

    Atmosphere's temperature

    The stratosphere warms with increasing altitude because of its ozone content, which blocks the suns ultraviolet rays, but what about the mesosphere and thermosphere why do they go from coller to warmer ?
  25. V

    Strange values on disc capacitors

    What do the strange values on disc capacitors signify exa 005 and 5D 1KV , why can't they just be abbreviated in a more intuative way like for exa just 10 micro farads ? Also for a small mic how can I tell apart which ends which + or 1 and what do the letters HAI signify on some...
  26. V

    Atmosphere's temperature

    On a summer day how will the temperature of the stratosphere, mesosphere, thermosphere and exosphere differ ?
  27. V

    Absolute heat ?

    Im confused here, whats the difference bettween temperature, heat and internal energy ?
  28. V

    Absolute heat ?

    Absolute temperature Is there such a thing as absolute temperature, where something just can't get any hotter ?
Top