Science & Mathematics - 11 September 2007

Water from a garden hose that is pointed 21° above the horizontal lands directly on a sunbather lying on the ground 4.7 m away in the horizontal direction. If the hose is held 1.4 m above the ground, at what speed does the water leave the nozzle? Please show work.

2007-09-11 11:58:40 · 1 answers · asked by Anonymous in Physics

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does electricty flow from neg to pos or pos to neg?

2007-09-11 11:54:08 · 6 answers · asked by kevin l 1 in Physics

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pipe sadle for a 3.5 inch pipe?

free online printable 1 to 1

2007-09-11 11:51:31 · 2 answers · asked by Anonymous in Engineering

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Who is better the organic chemist or the mechanical engineer?

2007-09-11 11:51:27 · 14 answers · asked by Experimental876 4 in Engineering

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landlocked or not?

is a country that has a really big lake on one side but otherwise surrounded by only countries, would it be considered landlocked?

2007-09-11 11:44:41 · 3 answers · asked by boo! 2 in Geography

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what is a physical property that affects whether a substance sinks or floats?

asap.

2007-09-11 11:42:15 · 5 answers · asked by dani-elle 1 in Chemistry

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{[3sin2x+4(cosx^2]}/2?

how do you find the definate integral of {[3sin2x+4(cosx^2]}/2 with limits o to pi/6

2007-09-11 11:41:12 · 1 answers · asked by Anonymous in Mathematics

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Abstract Algebra Dihedral Calculations (μ, ρ, etc.)?

Hello, I'm a bit confused on how to go about doing these calculations. For example, I am asked to compute the following in D6:

(μρ^2)(μρ^3) I know that the answer is ρ, but I'm completely unsure of how my professor arrived to that answer.

We are also given problems to work in D5 and then doing the same in D8, but I'm trying to at least understand this example before I can even begin to start the rest.

Thanks!

2007-09-11 11:37:30 · 2 answers · asked by The Light One 3 in Mathematics

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Finding the mean of 2 numbers?

I have 34 and 20 what is the mean and how do i find it? and how do i find standard dievation?

2. other numbers are 40 and 20, i need to find mean and standard dievation.

2007-09-11 11:37:05 · 4 answers · asked by inside and out 1 in Mathematics

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I am a teacher lets see how smart u are!?

how did hunting -gathering societies differ from forming societies?
how were native americans religious linked to the natural world?
Describe the social organization of the Iroquis.Why was the league of the Iroquis formed?
which of the three kinds of homes shown here would u expect to find in a hunting gathering society?explain. Which would be most suited to a settled forming community explain.

2007-09-11 11:33:43 · 7 answers · asked by Anonymous in Mathematics

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which way does a vertical line go and which way does a horizontal line go?

2007-09-11 11:31:58 · 8 answers · asked by Anonymous in Mathematics

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How many watts would it take to raise 50 lbs of water 90 degrees farenheit in 15 minutes?

I got 5274, but I don't know if I did it right. This is for a practical application, not a school problem... Thanks...

2007-09-11 11:31:09 · 4 answers · asked by Tim F 2 in Engineering

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How can you tell the difference between a velocity-time graph, an acceleration-time graph, and a...?

How can you tell the difference between a velocity-time graph, an acceleration-time graph, and a displacement-time graph? And how do you read them?

2007-09-11 11:29:22 · 3 answers · asked by fatiimaq08 3 in Physics

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Physics help, please explain why so i can learn it?

1. A driver begins to brake when her car is traveling at 14.0 m/s, and the car comes to a stop 3.5 s later. How much further does the car go after she begins to brake, assuming the acceleration is constant?
and
2. A penny dropped from the top of a tower would hit the pavement below in 5.3 s. How tall is the tower?

2007-09-11 11:27:58 · 1 answers · asked by Brian 4 in Physics

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finding the limit?

lim x^3 f(x) as x-->2 F(x) at this point is 2 but 2^3 is not the answer. What does the x^3 mean before f(x)?

2007-09-11 11:24:21 · 1 answers · asked by m_carl 1 in Mathematics

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find the time dilation ts/to for Earth's orbit about the sun if vEarth=10889 km/s. Derive the equation for ts.

ts: time seen by the stationary observer on Earth
to: time seen by the observer on spacecraft

2007-09-11 11:18:43 · 3 answers · asked by leyna_nguyen_0702 2 in Astronomy & Space

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y=2/3 * -3/1?

cross mutipling is to hard how do you solve this problem and how did you get it

2007-09-11 11:16:53 · 11 answers · asked by Anonymous in Mathematics

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what was the cause of acid rain in the adirondacks mountain?

?

2007-09-11 11:16:49 · 2 answers · asked by Russel 1 in Earth Sciences & Geology

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Given the following two end points for the line AB, find the distance between A and midpoint (see Q's below)

1. A(-7,-7) and B (-7,-4) 2. A(9,-6) and B(5,-6)
3. A(7,1) and B(10,1) 4. A(-1,-7) and B(-1,-2)
5.(A(9,-4) and B(10,1) 6. A (16, -10) and B(1,-12)

If you could show some of the steps for these it would be appriciated. To those who answer 1/2 I'll award 4/5 stars. To those who answer all of these, I'll award you a best answer and 5/5 stars.

2007-09-11 11:16:19 · 3 answers · asked by Tameeka 1 in Mathematics

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Why doesn't a hot air ballooon collapse in on itself? read on..?

Since a hot-air balloon is filled with heated air, it means that the pressure of the air inside the balloon is lower than the surrounding air. So then why doesn't the atmospheric pressure crush the balloon?

2007-09-11 11:14:17 · 2 answers · asked by DichloroDiphenyl 5 in Physics

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