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Snail13579

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Posts posted by Snail13579

  1. if you read the fine prints,...

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  2. yea sorry, i just started learning this in bio class, need some info to learn more about genotypes and Mendel's experiments.

     

    EDIT: so it is possible that the parents do not have the disease, but their children will get it? like a recessive recessive?

  3. If parents are normal and have 4 children inwhich 2 are normal but 2 children are infected. What kind of genotype does the parents have, i mean how is it that normal parents have infected children "/ ?

  4. Here's how I would do it. First, assume that the area in question is the minimum size, so that its area would be [math]A = \pi r^2 = \pi 37^2[/math]. The power of the air flow per turbine would be [math]Power = 1/2 * 1 kg/m^3 * A * v * v^2 = 2*99/66 MW[/math] (to generate 99MW at 50% efficiency with 66 turbines), so then [math]v = (\frac{4*99000000}{66 * \pi 37^2})^{1/3} m/s = 11.17 m/s = 40.2 km/hour [/math]. I'm ignoring that the turbine has 3 blades since we know its efficiency.

     

    Overall, a very nice, fun, practical, and eco-friendly math problem.

     

    well im not sure if im just good at guessing or what, what i did took like 2 minutes: i picked the largest of the answers(40km/hr) and changed it into m/s and multiplied that by 66*66*37/2*10=99 which i thought was accidental(probably was) explanation for that plz?

  5. answers are 15km/h, 20km/h, 25 km/h, 30km/h, 40km/h,

    i got 40km/h, btw ur doing waaaay too much i jus changed 40km/h to m/s and multiplied and decided what i thought was right and i got 0.99 which should be multiplied by 100(error somewhere)

  6. there are a few "hard" questions i didnt understand, it would be best if i had a scanner(although i got a friend who can scan it but isnt here atm). Basically you got 66 turbines to general 99MW of electricity. Each turbine got 3 blades, ea are 37m in length. Assume that avg density of air is 1kg/m3, what is minimum wind speed required for energy to pass the blades to generate the desired power(99MW) if its 50% efficiency. it gives like 5 options but i want to know how to get the answer without just selecting C(a general choice if you dunno i guess)

  7. Its the Ontario Association of Physics Teachers. They make contests for grade 11 students taking physics 11. The contest was today somewhere between morning to noon. If anyone else has taken the contest please discuss here(i need some answers now>:D) btw i can post the question sheet but im not really sure if im allow or not. Just in case one of you who took OAPT today wants to share some of your answers...please help, and do so =D

     

     

    here are previous questions:http://www.oapt.ca/grade_11_contest/past_exams.html

     

    its pretty interesting

  8. What pH level would be the best to grow yeasts?(if the yeasts are just normal Fleischmann's Yeast) :confused::confused:

     

    Oh and btw by pH level, i also want to know if it likes more basic or acidic environment.

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