Science & Mathematics - 19 November 2006

I feel really dumb asking this, but I completely forgot how to solve these!
(5x-3)^2

2006-11-19 10:46:45 · 5 answers · asked by Anthony L 2 in Mathematics

2006-11-19 10:45:49 · 2 answers · asked by diana m 1 in Chemistry

solve by synthetic division

2006-11-19 10:45:28 · 3 answers · asked by Kirk T 1 in Mathematics

name 2 only

2006-11-19 10:43:49 · 3 answers · asked by a_beautiful_letdown1990 1 in Geography

I am looking for information on the sea lion caves in Oregon. I need to know what type of rocks are in the cave and how it was formed. It would also be helpful to know of any legends associated with the caves :)

2006-11-19 10:39:42 · 2 answers · asked by CookFrNW 3 in Earth Sciences & Geology

I need to know how the Mississippi River came to be (glacier movement; plate techtonics; ect.). You know, the history of the Mississippi, from the break up of Pangea. Also, what geology forces are acting upon the river (deposition, erosion, weathering, ect.)? Any information/links would be helpful. Pictures on those links much appreciated. Thanks in advance.

2006-11-19 10:37:57 · 2 answers · asked by Anonymous in Earth Sciences & Geology

I got an Led that has a battery holder and it was working when I cut the wires off the led. The wires were getting hot and the batteries were giving off heat. Then, a couple minutes later, i thinnk i heard a crack. Then when I switched the power to on, the battery was not giving off any heat into the wires. I need help.

2006-11-19 10:34:58 · 2 answers · asked by Igobeg O 3 in Engineering

i need a paragraph for science sumin simple wat do u know and light and sound waves nuttn to hard 2 understand!

2006-11-19 10:33:12 · 3 answers · asked by tca2002_2003 1 in Other - Science

2006-11-19 10:32:33 · 3 answers · asked by jing 1 in Earth Sciences & Geology

FOR EXAMPLE A CAR WEIGHS 2500 LBS AND IS TRAVELING 65 MPH HOW DO YOU FIGURE OUT ITS FORCE

2006-11-19 10:32:13 · 4 answers · asked by Anonymous in Physics

please be specific and include source

2006-11-19 10:32:10 · 5 answers · asked by alex d 1 in Chemistry

2006-11-19 10:31:18 · 1 answers · asked by alfredmilner 1 in Engineering

In a diploid set of chromosomes, one member of each pair of homologous chromosomes is derived from the father (paternal), and the other comes from the mother (maternal).


.......If 2n = 6, what is the probability of obtaining a gamete in which all the chromosomes are paternal ones?

2006-11-19 10:31:11 · 4 answers · asked by Anonymous in Biology

(x+5)^(1/2) + (x+10)^(1/2) >2
After solving it i get x > -79/16 however if you put -5 in the equation it works. After thinking for a bit i thought of the part where i get
1/4 < (x+5)^(1/2) and when you know that a radical has to be greater than 0, so I just switched the 1/4 with a 0 and i get x>-5 but that doesnt really seem right to me. I put the equation in the calculator and it got x >-5

2006-11-19 10:29:37 · 1 answers · asked by SeriousTyro 2 in Mathematics

A type of elevator called a cage is used to raise and lower miners in a mine shaft. Suppose the cage carries a group of miners down the shaft. If the unblanced force on the cage is 60.0 N, and the mass of the loaded cage is 1.50*10^2 kg, what is the acceleration on the cage?

2006-11-19 10:28:32 · 2 answers · asked by Sarah S 1 in Earth Sciences & Geology

Why? Be specific plz

2006-11-19 10:27:22 · 8 answers · asked by Ann 2 in Weather

2006-11-19 10:19:41 · 4 answers · asked by indiangirl!=D 3 in Mathematics

The hands of clock A point to 6 o clock. At the moment past 6 the minute hand traveling downwards will have a increase of speed of x% every minute due to gravity. At 6:15 the speed of the minute minute hand will be of constant speed until 6:30. Since the hour hand at 6 is traveling upwards against gravity, its motion will be slowed by y% every hour until 9:00. After 9 the hand will have a constant speed until midnight. If clock B is place in a weightless enviroment, the minute and hour hand will perfectly match each other some time after 6 o clock. The hands of clock A will do the same, although at a different time. In terms of x and y, the absolute difference in times when this will happen is what?

2006-11-19 10:18:30 · 2 answers · asked by Anonymous in Mathematics

2006-11-19 10:17:59 · 6 answers · asked by merviedz trespassers 3 in Physics

I have seen the happen multiple times and it completely fascinates me (being a very scientificely accurate person). But, I cannot whatsoever figure out how this happens. My main eye color is a dark brown. On some days, it's blue! And on other days, it's green! It is truly extraordinary! Plus, it was not just me who has seen this happen, other family members and friends have watched this happen to me too. How is this possible? I really am anxious to find out.

2006-11-19 10:17:57 · 5 answers · asked by Imagine, Its Contagious! 3 in Other - Science

how is the structure of the red blood cells adapted to its function?

2006-11-19 10:17:56 · 2 answers · asked by dlqmswjddhks 1 in Medicine

I have to do a science test on space and i need to get information on space.

2006-11-19 10:17:38 · 5 answers · asked by Anonymous in Astronomy & Space

A proton with mass 1.67 *10^-27 kg moving with a velocity of 4.46 * 10^6 m/s straight up.

_____kg*m/s upward

i know it's momentum = mass x velocity but i'm kinda confused with the powers of 10.

2006-11-19 10:15:06 · 4 answers · asked by tingerpoo 2 in Physics

I have one column of data for 3,500 days (Column A). I created a second column of numbers, 1 to 3500 (Column B).

In Excel, I then entered the formulae =RSQ(A1:A3,B1:B3) and =RSQ(A1:A4,B1:B4) etc. up to 100 days. As of today, the Linear Regression Trendline (LRT) that best fits my data is a 91-day LRT. It has an R-squared value of .9685.

To set outer bands for tomorrow's possible data, should I use "Standard Error" (SE) or "Standard Deviation" (SD)? After brief backtests, if I have a LRT with an R-squared > .9, my data normally reverses if it gets near 2 SE from that LRT unless the LRT is for a short time period (i.e., between 3 and 10 days). If I use SD, however, it appears that my data rarely gets anywhere near 2 SD from a LRT with an R-squared > .9--unless a short time period (i.e. 3-10 days).

If I should use SE, and I multiply the SE for the last 91 days by a z-value of 1.96, is the confidence interval (CI) 95%? If not, how can I find a CI of 95% (like 2SD) for SE value?

2006-11-19 10:14:34 · 2 answers · asked by Anonymous in Mathematics

1/s'=(1/f)-(1-s)

what would s' be.

i thought you would just have to invert each one and get s'=f-s but that is not the case.

2006-11-19 10:14:16 · 2 answers · asked by ElDarado05 2 in Physics

I have read in my textbook and searched online, but I haven't found what I need to know. Help? :) Thanks!

2006-11-19 10:13:20 · 7 answers · asked by amyo4190 2 in Mathematics

Because of a frictional force of 2.6 N, a force of 2.8 must be applied to textbook in order to slide it along the surface of a wooden table. The book accelerates at a rate of 0.11 m/s to the 2nd power.

a. What is the unbalanced force on the book?

b. What is the mass of the book?

2006-11-19 10:12:56 · 3 answers · asked by Sarah S 1 in Astronomy & Space

2006-11-19 10:11:41 · 2 answers · asked by melanie m 1 in Physics

what is the solution set for 2x^2-7x-4=0

steps would be helpful and much appreciated.

2006-11-19 10:11:03 · 4 answers · asked by BLUEEEE 1 in Mathematics

If sugar as we know, is a food . how is it that we can use it as a preservative in fruit and jams etc. What is going on

2006-11-19 10:10:34 · 3 answers · asked by Anonymous in Chemistry