Two skiers begin skiing along a trail at the same time. The faster skier averages 9 miles per hour and the slower skier averages 6 miles per hour. The faster skier completes the trail 1/4 hour before the slower skier. How long is the trail?

2007-09-22 15:19:43 · 2 answers · asked by butterflyangel 3 in Mathematics

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what is the derivative of (1 - ln(x))^2?

2007-09-22 15:15:41 · 4 answers · asked by Anonymous 3 in Mathematics

5 ⤊

if you fell into a dark hole where would you go ?

2007-09-22 15:15:35 · 13 answers · asked by Anonymous in Astronomy & Space

11 ⤊

Can you see auras on old photographs?

2007-09-22 15:13:42 · 7 answers · asked by Margaret L 1 in Paranormal Phenomena

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sorry, differentiate Y = ln(3x^4+2x) i dont get this much?

i forgot to add that on the last one, sorry

2007-09-22 15:09:58 · 3 answers · asked by jake p 2 in Mathematics

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Does Ciprofloxacin contain sulfur?

2007-09-22 15:09:27 · 3 answers · asked by stargzer 2 in Medicine

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Ineed help with an egg drop project in science.?

It cannot be bigger than 10cm long in nay direction. We cannot use playdoh or any type of substance in that material. Also no food.

2007-09-22 15:05:48 · 7 answers · asked by lissa 1 in Engineering

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In september of 1985, When was the full moon?

2007-09-22 15:05:35 · 2 answers · asked by Juanita D 1 in Astronomy & Space

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projectile motion question?

A projectile is shot from the edge of a cliff h = 185 m above ground level with an initial speed of v0 = 155 m/s at an angle of 37.0° with the horizontal, as shown in Fig. 3-35.

http://www.webassign.net/giancoli5/3_39alt.gif
Figure 3-35

(a) Determine the time taken by the projectile to hit point P at ground level.
s

(b) Determine the range X of the projectile as measured from the base of the cliff.
km

(c) At the instant just before the projectile hits point P, find the horizontal and the vertical components of its velocity. (Take up and to the right as positive directions.)
horizontal m/s
vertical m/s

(d) What is the the magnitude of the velocity?
m/s

(e) What is the angle made by the velocity vector with the horizontal?
° (below the horizontal)

(f) Find the maximum height above the cliff top reached by the projectile.
m

2007-09-22 15:04:18 · 1 answers · asked by oxblackout12 1 in Physics

1 ⤊

Do you think there will be another Space Shuttle accident?

2007-09-22 15:04:17 · 9 answers · asked by Anonymous in Astronomy & Space

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a question about astronomy?

OK, this is the last one. What is the moon called that is visible for a northern-Hemisphere observer, looking into the south-eastern sky just after sunset?

2007-09-22 15:03:00 · 3 answers · asked by Anonymous in Astronomy & Space

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converting HP into kilowatts?

There's 12 HP, how do you express this power in SI system and report the numerical value in kilowatts.?

2007-09-22 15:01:59 · 5 answers · asked by shall_i 1 in Physics

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What are the 3 physical methods to separate mixtures?

The title explains all, if anyone knows please answer. thank you!

2007-09-22 15:01:42 · 8 answers · asked by Anonymous in Chemistry

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Calc III help....will give "best answer"?

Find parametric equations for the tangent line at the point
(cos(pi/6), sin(pi/6), (pi/6) on the curve x=cos t, y=sin t z=t

please help...i have tried this a lot and cant get it...i always give best answers for hw help.

2007-09-22 14:59:47 · 2 answers · asked by Anonymous in Mathematics

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Eigenvectors!?

Find the eigenvalues & corresponding eigenvectors of the matrix A =
[ 1 2 4 ]
[ 1 2 4 ]
[ 1 2 4 ]

ok so i've found the eigenvalues to be 7 and 0 but i can't find the eigenvectors. help plssssss~~~

2007-09-22 14:57:14 · 2 answers · asked by Snoopy 1 in Mathematics

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what is the name of this energy?

It is a measure of light energy that hits one square meter in one second

2007-09-22 14:55:42 · 5 answers · asked by Anonymous in Astronomy & Space

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what is the same between the greek theory and the big bang theory how the earth came to be?

2007-09-22 14:55:37 · 1 answers · asked by Anonymous in Astronomy & Space

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how do u do this?

Bornite (Cu3FeS3) is a copper ore used in the production of copper. When heated, the following reaction occurs.

2 Cu3FeS3(s) + 7 O2(g) 6 Cu(s) + 2 FeO(s) + 6 SO2(g)
If 4.48 metric tons of bornite is reacted with excess O2 and the process has an 83.7% yield of copper, what mass of copper is produced?

2007-09-22 14:54:47 · 2 answers · asked by s.weiss 1 in Chemistry

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