Science & Mathematics - 1 November 2007

2007-11-01 16:20:43 · 3 answers · asked by Anonymous in Geography

I saw the sun and the moon visible at 11:30 a.m.

2007-11-01 16:19:51 · 4 answers · asked by planterfour 1 in Astronomy & Space

i really dont understand the gas laws. like temperature, pressure, and gas? and how if one changes, it affects another. one example is if a balloon is in the atmosphere on a cold day, the temperature has decreased, so does the pressure and volume decrease too? or does it increase. i would really appreciate if you could explain, because i have a test tomorrow, and ive been studying these gas laws for the past hour, and im more confused. PLZ HELP!!!

2007-11-01 16:18:47 · 5 answers · asked by ~hersh101~ 2 in Physics

Also If i have a value that is work/s how do i convert that to kilowatt/hours?

Also why should a power company be called an energy company?

2007-11-01 16:17:14 · 3 answers · asked by maxk222 1 in Engineering

how do i solve this.

2007-11-01 16:15:22 · 2 answers · asked by xOx Frenchie xOx 2 in Mathematics

Bob will rent a car for the weekend. He can choose one of two payment plans. The first plan costs $53.98 for two days plus 13 cents per mile. The second plan costs $45.98 for two days plus 18 cents per mile. How many miles does Bob need to drive for the two plans to cost the same?

2007-11-01 16:15:13 · 13 answers · asked by Ash 2 in Mathematics

I'm supposed to show that (C(x))² + (S(x))² = 1

C(x) = ∑ (from k = 0 to infinity) { [ (-1)^k] / (2k)! } x^(2k)

S(x) = ∑ (from k = 0 to infinity) { [ (-1)^k] / (2k+1)! } x^(2k+1)

I'm not allowed to just say C(x) = cos x and S(x) = sin x so cos²x + sin²x = 1

I was given a hint to let f(x) = (C(x))² + (S(x))² and I have already proven that f ' (x) = 0, so I know that f(x) is equal to some constant, but how do I show that constant is 1?

2007-11-01 16:14:53 · 1 answers · asked by q_midori 4 in Mathematics

1. Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.

2.The Hudson River flows at a rate of 3 miles per hour. A patrol boat travels 60 miles upriver, and returns in a total time of 9 hours. What is the speed of the boat in still water?


3. A designer attempts to arrange the characters of his artwork in the form of a square grid with equal numbers of rows and columns, but finds that 24 characters are left out. When he tries to add one more row and column, he finds that he has 25 too few characters. Find the number of characters used by the designer.

use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex.
1. (3)1/2y2 - 4y - 7(3)1/2 = 0

2007-11-01 16:13:51 · 3 answers · asked by Snoopy Baby 1 in Mathematics

Sorry to ask such a question, but our study group is at a loss as how to continue and our homework is due tomorrow. So here goes:

In order to receive credit we MUST use calculus techniques:

We have a piece of wire that is 100cm long and we're going to cut it into two pieces. One piece will be bent into a square and the other will be bent into a circle. Determine where the wire should be cut so that the enclosed areas will be at maximum. Note that it is possible to have the whole piece of wire go either to the square or to the circle

2007-11-01 16:12:37 · 4 answers · asked by pyrojelli 2 in Engineering

If the city is close to the equator, that place is warmer right? And if the city is further away from the equator, that place is colder right??

2007-11-01 16:12:23 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Sorry to ask such a question, but our study group is at a loss as how to continue and our homework is due tomorrow. So here goes:

In order to receive credit we MUST use calculus techniques:

We have a piece of wire that is 100cm long and we're going to cut it into two pieces. One piece will be bent into a square and the other will be bent into a circle. Determine where the wire should be cut so that the enclosed areas will be at maximum. Note that it is possible to have the whole piece of wire go either to the square or to the circle

2007-11-01 16:11:56 · 3 answers · asked by pyrojelli 2 in Physics

I have to do this test review for Biology and I need major help on it! Can anyone answer this question for me, please?

2007-11-01 16:10:19 · 5 answers · asked by I love band! 1 in Biology

can you help me find the intercepts?

1.) y = -x^2 + 9

2.) y= x^2 -9

2007-11-01 16:10:12 · 4 answers · asked by Juan C 6 in Mathematics

Factor. 50x^3 – 90x^2

2007-11-01 16:09:38 · 5 answers · asked by Anonymous in Mathematics

Sorry to ask such a question, but our study group is at a loss as how to continue and our homework is due tomorrow. So here goes:

In order to receive credit we MUST use calculus techniques:

We have a piece of wire that is 100cm long and we're going to cut it into two pieces. One piece will be bent into a square and the other will be bent into a circle. Determine where the wire should be cut so that the enclosed areas will be at maximum. Note that it is possible to have the whole piece of wire go either to the square or to the circle

2007-11-01 16:08:34 · 3 answers · asked by pyrojelli 2 in Mathematics

2007-11-01 16:08:05 · 5 answers · asked by tomato 1 in Mathematics

2007-11-01 16:06:56 · 8 answers · asked by Space smart 2 in Astronomy & Space

Place the following in order of decreasing metallic character.

P

As

K

2007-11-01 16:05:23 · 2 answers · asked by Jay H 1 in Chemistry

Why are there different types of quartz specimens yet they all have the same chemical formula Si02?

2007-11-01 16:04:45 · 3 answers · asked by Gideon 1 in Earth Sciences & Geology

18+(-3.8x)=7.36+(-1.9x)

2007-11-01 16:03:08 · 2 answers · asked by Anonymous in Mathematics

2007-11-01 16:02:41 · 3 answers · asked by ashgirl 1 in Biology

how would I determine the value of the trig ratios when I'm given the angle in radians ?

a.) cot 0.942
b.)csc 3.3

and how did u plug it into your caculator ?

2007-11-01 16:02:13 · 7 answers · asked by VMars 2 in Mathematics

cos(sin^-1(x))


sin(2sin^-1(x))


cos(sin^-1(2x))

2007-11-01 16:00:01 · 1 answers · asked by Anonymous in Mathematics

the alien is stying still, looks at the camera and then jumps, they passed it on telemundo or something like that today in the morning. they say its very realistic

2007-11-01 15:57:50 · 2 answers · asked by huxter1822 1 in Astronomy & Space

Ribosomes are cellular structures that assemble large protein molecules from smaller amino acid molecules.

2007-11-01 15:56:39 · 6 answers · asked by Sarah T 1 in Biology

Is there a spider that is strong enough to push a human out of the way when it's coming after you? I read it on some site but I can't find the site again. It said something about a particular spider that is strong enough that if you were running from it and pushed against your kitchen door (or whatever other door) it could push the door open trying to get at you. Is there really such a spider? If so, what's the name of it? And do you know any sites that I can look on to find information on it?

2007-11-01 15:55:22 · 12 answers · asked by Catelin 2 in Zoology

ok there's a coule=/

1- unscramble "rotbeics"
2- what operation signs must be placed in the blanks to get a result of 5? - "2_4_6_8=5"
3-what is the next number in the sequence? explain.
"1,1,2,3,5,8,13" and who made this sequence so famous?

2007-11-01 15:55:03 · 5 answers · asked by my_only_onee_x3 2 in Mathematics

I really need this question answered. Im completly stumped and cannot find the answer in my reading material provided by my teacher. thanks a bunch

2007-11-01 15:54:44 · 4 answers · asked by Brit brit_crombie 1 in Biology

2007-11-01 15:54:26 · 12 answers · asked by sweeetsup l 1 in Geography

a spherical snowball is melting. its radius is decreasing at 0.2 cm per hour when the radius is15 cm. How fast is its volume decreasing at that time?

2007-11-01 15:53:53 · 2 answers · asked by Sultana 2 in Engineering