Science & Mathematics - 11 January 2007

A force of 50lbs is directed 50 degrees above horizontal, pointing to the right. Determine its horizontal and vertical components.

I dont know where to begin. If you can help me out, that would be fantastic.

In this particular section of this book, we just learned that:

a . b = IIaII IIbII cos theta

IIaII = Sqrt (a1^2, a2^2, a3^2)

Projection of a onto b (P) = [(a . v)/ IIaII^2] * a

Thanks for any ideas.

2007-01-11 16:44:14 · 3 answers · asked by Linda D 1 in Mathematics

neon, cadmium, vanadium, and phosphorus! I really need this!

2007-01-11 16:38:36 · 1 answers · asked by nc123135 1 in Chemistry

2007-01-11 16:38:08 · 6 answers · asked by Anonymous in Chemistry

Well IM reducing it and the book says it changes from x^2(X+3)-2(X+3)/(X+3)(X^2-3X+9) to (x^2-2)/(X+3)(X^2-3X+9). PLease help me It may not make sense but IM seriously stuck.

2007-01-11 16:29:46 · 8 answers · asked by raider 1 in Mathematics

Use property one sqrt(ab) = sqrt(a) * sqrt (b)

to solve this problem with out using a calulator

sqrt50

and

sqrt72x^3

and finally

using property 2

sqrt(a/b) = sqrt(a) / sqrt(b)

to solve the following problem

sqrt 10/49

2007-01-11 16:29:30 · 3 answers · asked by CookFrNW 3 in Mathematics

I am a beginner. Read reviews, most ppl recomend 15x10 I am wearing glasses, so looking for one that feel more comfortable and also the best view. I wonder which brand is good for me. My budget is below AU300. Can anyone help?

2007-01-11 16:29:03 · 3 answers · asked by jsc2000 1 in Astronomy & Space

monkeys and apes

2007-01-11 16:28:53 · 26 answers · asked by Matthew S 3 in Biology

do the gills extract the oxygen? how does this work?

2007-01-11 16:28:46 · 7 answers · asked by Anonymous in Zoology

Why does the silver nitrate+water solution turn blue with the added copper??

2007-01-11 16:26:43 · 6 answers · asked by Anonymous in Chemistry

3x-27/19x+7

3x+27/18x

3x^2/4x^2+9x+8

3x/9x^3

sry if these don't work out perfectly as i'm making them up in my head. so pretty much, the question is how do you find the domain, range, and vertical/& horizontal asymptotes?

all i know is that if the degree is same in the numerator and the denominator then to find the horizontal asymptote just divide the leading coefficient in the numerator by the leading coefficient in the denominator. to find the vertical asymptote, set teh denominator to zero. but these only works if the degree is the same in both the numerator and denominator. what about if the degrees are different?


b) how would you also find the domain and range of exponential problems? like (1/5)(5^x)=y

2007-01-11 16:26:06 · 2 answers · asked by clock 2 in Mathematics

Please!!! I need a number for all four a.s.a.p.!!!

2007-01-11 16:25:51 · 2 answers · asked by nc123135 1 in Chemistry

Suppose this planet of the apes were like the one in the movies and would you be alarmed? How about a trip there? Imagine, the past, present & future earth in the same solar system/Milky Way Galaxy.

2007-01-11 16:25:01 · 6 answers · asked by ZORRO 3 in Astronomy & Space

2007-01-11 16:24:46 · 10 answers · asked by Q 1 in Mathematics

If not then during cell multiplication how do identical chromosomes (carrying same genetic information) from different parents come close together for exchange of genetic information?

2007-01-11 16:24:26 · 3 answers · asked by akhilesh v 2 in Biology

In nature we find that different species have different number of chromosomes. It can be argued (at least theoretically) that the same genetic information could have been stored on a single chromosome strand; why then in nature we find multiple chromosomes. It is obvious that it makes the structure more compact, but does it make multiple chromosomes more efficient than a single strand allowing multiple cross over (for exchange of genetic information during cell multiplication)?

2007-01-11 16:21:49 · 2 answers · asked by akhilesh v 2 in Biology

Please help with this equation

Find the time required for an object to fall to the ground form a building that is 1400 ft high using the following formula

t=1/4sqrts in which s is the distance fallen.

2007-01-11 16:21:22 · 5 answers · asked by CookFrNW 3 in Mathematics

x-2y+5z=2
4x-z=0
I need help..the answer in the back on the book
is (2a,21a-1,8a)
can you please explain to me how to do it

2007-01-11 16:20:48 · 2 answers · asked by elizabeth g 2 in Mathematics

2007-01-11 16:20:36 · 7 answers · asked by Anonymous in Astronomy & Space

Black Diamonds originate in hydrogen-rich interstellar space. aka carbonado diamonds. They were formed in stellar supernovae explosions. Are they more or less expensive than regular diamonds since they come from outer space. Are they stronger?

2007-01-11 16:19:37 · 3 answers · asked by ZORRO 3 in Earth Sciences & Geology

2.1x - 2.58= 1.26 - 4.3x


and

2x + 6 < x + 9

2007-01-11 16:17:12 · 8 answers · asked by soul2true 1 in Mathematics

Find the four real zeros (including multiplicity) of the polynomial f(x) = x^4 + 4x^3 - 11x^2 -66x - 72. Determine the sum of all the zeros of f(x).
Answer choice; A)-4 B)-1 C)-5 D)None of these

This is a multiple choice question and I chosed D, but they said the answer was A, -4. I kept doing this problem over and over but didn't seem to get the right answer. Can someone show me the step by step on how to figure out this problem? Thanks.

2007-01-11 16:17:09 · 2 answers · asked by mrhuangsta 3 in Mathematics

about internet

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2007-01-11 16:15:47 · 9 answers · asked by Arkansas Buckeye 2 in Mathematics

2007-01-11 16:15:36 · 4 answers · asked by mugen 1 in Engineering

rtttt

2007-01-11 16:15:29 · 10 answers · asked by HARITHA SREE 1 in Astronomy & Space

2007-01-11 16:14:58 · 4 answers · asked by brandi h 1 in Biology

2007-01-11 16:12:44 · 9 answers · asked by Anonymous in Chemistry

Na2SO4 (aq) + BaCl2 (aq) ===>BaSO4 (s) + 2NaCl (aq)

3.0 mol NaSO4 = --?--- g BaSO4
three moles of sodium sulfate equals how many grams of barium sulfate? Please show ur work i am really having trouble trying to figure out this problem.

2007-01-11 16:08:43 · 4 answers · asked by J.r. 3 in Chemistry

Since the shuttles and rockets are launced from Kennedy Space Center, why does Nasa use Houston as its main center once missions are underway. Is it because Cape Canaveral is vulnerable to hurricanes?

2007-01-11 16:06:18 · 4 answers · asked by Steve 1 in Astronomy & Space

In fact I'm the student of civil engineering, haven't finished my education yet and haven't worked. I would have a lecture before students of other fields about the brief introduction of civil engineering.whatt should I do and where I can find my answer in order to have a better lecture?

2007-01-11 16:04:05 · 5 answers · asked by Nazli T 1 in Engineering