Science & Mathematics - 4 December 2007

1/5 of the female freshmen at a private college are out of state students. if the students are assigned at random to the dormitories, 3 to a room, how do i find the probability that, in one room, at most 2 of the 3 roomates are out of state students?

2007-12-04 06:09:39 · 2 answers · asked by Tom w 1 in Mathematics

. J.B.S. Haldane (a famous population geneticists) once remarked that he’d be willing to lay down his life to save two brothers or eight cousins. Explain what he meant. Based on the theory of kin selection and reciprocal altruism, predict the conditions under which people are expected to be nice to one another.

2007-12-04 06:09:17 · 2 answers · asked by Anonymous in Biology

If a 12 pound ball is dropped and attains a velocity of 8.8 ft/s 3.0 seconds whats is the mass of the ball "note the gravity is different then earths and its not given"

2007-12-04 06:06:29 · 3 answers · asked by Anonymous in Physics

2007-12-04 06:06:20 · 22 answers · asked by plasticbag 2 in Earth Sciences & Geology

I found these two cameras i really like the 3x, but im gettign kinda skeptical, because theres one i dont like as much but it has 5x.... what should I do?

2007-12-04 06:04:57 · 5 answers · asked by Silly_Lily 1 in Mathematics

Compare and contrast the biomes found at increasing elevation on a mountain with the biomes found at increasing latitude.

2007-12-04 06:04:01 · 2 answers · asked by Anonymous in Biology

How do you solve this problem?

Thanks in advance for any help


The radius of each wheel of a car is 15 inches. if the wheels are turning at the rate of 3 rev/s how fast is the car moving. Express the answer in inches per second and miles per hour.

2007-12-04 06:02:30 · 5 answers · asked by Krazyk78 1 in Mathematics

plz help with polynomials

2007-12-04 06:00:36 · 5 answers · asked by shellyeph 1 in Mathematics

Suppose that 0.83g of water condenses on a 85.0-g block of iron that is initially at 24 degrees C.

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in degrees C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 Kj/mol)

2007-12-04 05:59:24 · 1 answers · asked by Anonymous in Physics

In a ballistics test, a 21.0 g bullet traveling horizontally at 1300 m/s goes through a 30.0 cm -thick 450 kg stationary target and emerges with a speed of 900 m/s. The target is free to slide on a smooth horizontal surface.

How long is the bullet in the target?

______s

What average force does the bullet exert on the target?

______N

What is the target's speed just after the bullet emerges?

______m/s

2007-12-04 05:54:17 · 3 answers · asked by Anonymous in Physics

i have a question

-
Make r the subject

S=4(the pie symbol)r(^2)

Can you give clear instructions on how to do the method please.
No calculator allowed.
thanks

2007-12-04 05:53:08 · 3 answers · asked by Anonymous in Mathematics

Solve (9x^4) + (7x^2) -2 =0 by factoring.

2007-12-04 05:51:40 · 4 answers · asked by Anonymous in Mathematics

A regular cubic dice can be marked to give 2, 3, or 6 equally likely events. A tetrahedron can give 2 or 4 equally likely events. A Isocahedron can give 2, 4, 5, 10, 20 equally likely events. An octahedron can give 2, 4, 8 equally likely events. Two cubic dice can give 9 equally likely events. What's the smallest combination of such marked regular polyhedral dice that will give 7 equally likely events?

2007-12-04 05:49:44 · 5 answers · asked by Scythian1950 7 in Mathematics

Solve:

N= 3(pi) √(1/P) for P

(pi)=3.14

2007-12-04 05:47:17 · 3 answers · asked by Anonymous in Mathematics

I have a question about taking limits... I never know, when taking the limit as x approachs something like 0 or infinity, how to go about the problem... well obviously I try to rearrange the equations to see if anything cancels, but then I never know whether to try to take the limit as x approaches from either side, or whether to use l'Hopital's rule, or do something completely different... I just get confused...

Is there some kind of checklist of things to try (in order of how you should try them) when evaluating limits like this? By limits like this I really mean limits where you can't directly sub in the number (or other variable) that x approaches.... Thanks!

(and I know l'Hopital's rule is only for indeterminate equations or whatever those are called, I was just giving an example...)

Thanks again! :)

2007-12-04 05:40:40 · 3 answers · asked by Anonymous in Mathematics

2007-12-04 05:39:31 · 7 answers · asked by C. B. 2 in Engineering

HI
CO
CCl4
NaCl
N2

2007-12-04 05:36:50 · 3 answers · asked by Anonymous in Chemistry

Organs or organisms structurally diverse though related by ancestry

a.meiosis b. allopatric speciation c.genetic drift d. natural selection e. adaptive radiation f. disruptive selection g.mitosis h. sympatric speciation i.bottleneck effect j. mutaion k. convergent evolution l. stabilizing selection

2007-12-04 05:36:50 · 2 answers · asked by Anonymous in Biology

2007-12-04 05:36:48 · 3 answers · asked by leo s 1 in Physics

2007-12-04 05:35:05 · 2 answers · asked by Chs_8_Hoopster 2 in Chemistry

QUESTION:
How would you arrange the steps in order in a continuous, twice differentiable function when finding its inflection point?

THE CHOICES IN RANDOM ORDER:

A = evaluate the function at the points where the second derivate is zero
B = analyze the sign changes of the second derivative
C = find the zeors of the second derivative
D = find the second derivative
E = find the first derivative

Whats the proper order A through E?

Thanks!

2007-12-04 05:28:59 · 3 answers · asked by gatortheone 1 in Mathematics

i have a question

-
Write as a power of 5

5 to the power of 3 * 5 * 5 to the power of 4

-
can you please give good instructions on how to do this please
No calculator allowed.
Thanks

2007-12-04 05:26:46 · 5 answers · asked by Anonymous in Mathematics

There is currently an article circulating on the internet that claims to give tips on saving when filling up on gas. The full article can be found here:
http://www.snopes.com/inboxer/household/gastips.asp

I was hoping someone with a scientific background or someone who works in the industry could answer this question. I am curious to know if this is factual or just another urban myth.

2007-12-04 05:25:25 · 3 answers · asked by Max 1 in Other - Science

representing the galactic center?

2007-12-04 05:23:19 · 5 answers · asked by Jansen J 4 in Astronomy & Space

2007-12-04 05:23:04 · 17 answers · asked by Anonymous in Astronomy & Space

2007-12-04 05:22:32 · 15 answers · asked by salomikuddy 2 in Engineering

Gravity bends light, i know that thats true, but how? if light cannot be slowed in a vacuum, how can it be bent without being slowed?

2007-12-04 05:21:13 · 3 answers · asked by Anonymous in Physics

2007-12-04 05:17:32 · 8 answers · asked by Anonymous in Astronomy & Space

If not, why what does it do to you?

2007-12-04 05:17:16 · 8 answers · asked by FC 4 in Medicine

when zinc in refined by electrolysis, the following reaction at the cathode is:

zn2(aq)+ +2e- ---->zn(s)

a competing reaction which lowers the yield is the formation of hydrogen gas

2H+ (aq) + 2e- ------>H2(g)

If 91.5 % of the current flowing results in zinc being deposited, while 8.5% produces hydrogen gas, how many liters of H2 (g), measured at STP, form per kg of zinc?

2007-12-04 05:14:09 · 3 answers · asked by skoolgrl217 2 in Chemistry