Science & Mathematics - 1 October 2007

Hi i cant say am much of a physics person, can you suggest one question i could plan to investigate about the move of objects on ramps?
I have to also give one factor i could change as i carry out investigation
One factor to measure, what i would use to measure and one factor to keep same to keep it fair...

I was thinking "does the shape of an obj effect its movement on ramp", could change obj shape, would measure time taken to travel down ramp, eqpt would be stopwatch and factor to keep same angle of ramp...

does this seem right?

2007-10-01 08:32:48 · 3 answers · asked by windwalker296 1 in Physics

2007-10-01 08:28:37 · 5 answers · asked by Anonymous in Mathematics

Find the x-intercepts, y = x2 – 2x + 4

2007-10-01 08:27:53 · 4 answers · asked by trevor s 2 in Mathematics

2007-10-01 08:26:12 · 7 answers · asked by Leighton M 1 in Mathematics

its basic algebra but its been so long.

2007-10-01 08:25:37 · 8 answers · asked by Daniel S 1 in Mathematics

2007-10-01 08:24:12 · 4 answers · asked by minniemoe 1 in Mathematics

2007-10-01 08:19:07 · 2 answers · asked by tauras t 2 in Engineering

How many resistors of resistance 7Ohms each are required to make a resistor of 1ohms. How must they be connected?

thanks, i need help with this

2007-10-01 08:17:45 · 3 answers · asked by Anonymous in Engineering

A an outer energy level
B a valenence electron
C a neutron
D a proton

2007-10-01 08:14:59 · 1 answers · asked by Anonymous in Chemistry

http://www.livescience.com/animals/071001_longest_flight.html

I just want to be clear, a bird flew all that way, never landing on anything?

2007-10-01 08:12:02 · 2 answers · asked by searching_please 6 in Zoology

A Ag
B Ag+
C S
D S2-

2007-10-01 08:11:22 · 3 answers · asked by Anonymous in Chemistry

In Gainesville, Florida it doesn't seem to happen. I can safely say it is around 150 deg.

2007-10-01 08:10:03 · 11 answers · asked by ravitejachinta 2 in Astronomy & Space

What is the value of these expressions? I'm supposed to leave them in three significant digits.

1. [(92.5)(.345)] / 17.4

2. I don't know how to put this. There is a "4" in superscript, followd by the root symbol, with the number .00439 in it? The fourth root of .00439?

3. [(.391)(97.2)]^2

2007-10-01 08:05:14 · 3 answers · asked by zenmaster4 2 in Mathematics

The symbol appears after a Feature Control Frame and is a circle with a vertical line going through the center and it is black on one side and white on the other. Looks exactly like the "contrast" button on a monitor. It doesn't really affect me at the moment, but now my curiousity is piqued. Anyone know what this symbol represents?

2007-10-01 08:05:12 · 2 answers · asked by Brad B 1 in Engineering

...to reduce 23.3 mL of a 0.374 M KMnO4 solution according to the following equation?

10 HI + 2 KMnO4 + 3 H2SO4 5 I2 + 2 MnSO4 + K2SO4 + 8 H2O

2007-10-01 08:04:46 · 1 answers · asked by jvt022285 1 in Chemistry

1) 1 molal CaCl2
2) 1 molal NaNl
3) 1 molal C12H22O11
4) 2 molal C6H12O6

2007-10-01 08:01:39 · 1 answers · asked by Anonymous in Chemistry

I'm looking for a "linear thermocouple" or a thermocouple that is relatively linear over a range of 70-220 degrees Farenheit. By relatively linear, I mean that I could allow an error under 2 degrees farenheit in that range. Anybody know anything about this, or where to find good charts? I'm trying to make this inexpensive.

2007-10-01 08:00:03 · 3 answers · asked by Tim F 2 in Engineering

someone help me with these 2 problems..it says write each number in standard notation.

1) 5x10^-2

2) 2.04x10^3

2007-10-01 08:00:00 · 5 answers · asked by Anonymous in Chemistry

Is there a logical proof to the Heliocentrism? I don't mean to a science-proof like telescope and sateline pictures, etc...

Thank you,

2007-10-01 07:55:47 · 11 answers · asked by Anonymous in Astronomy & Space

Hey, how can i integrate x/(1+(x^4))??? please help.

2007-10-01 07:54:18 · 1 answers · asked by tumbleweedyg 2 in Mathematics

Hi Friends. i really Need This answer. i'm student and i have to use this formola (PV=nRT) In My Life. I mean my teacher Asked Me To Find An Example Of Using This Formola In My Daily Life. I have found 2 examples But They Are Not available Cause The Others Told That Before, If Some One Could Answer Me I Really Enjoy And Happy And Sure He Or She Are My Best Answer. Thanx

ZEROX
HomeHacker Security Team

2007-10-01 07:52:35 · 3 answers · asked by Anonymous in Physics

2007-10-01 07:49:08 · 17 answers · asked by Anonymous in Zoology

Na_2SO_4 + AgNO_3

2007-10-01 07:42:33 · 4 answers · asked by Anonymous in Chemistry

You drive a car 8h at 50 km/h, then 8h at 68km/h.

What is your average velocity? Answer in units of km/h.

2007-10-01 07:39:13 · 5 answers · asked by Anonymous in Physics

...is dissolved in water and treated with an excess of AgNO3. If the mass of the AgBr precipitate that forms is 0.6064 g, what is the percent by mass of Br in the original compound? = ___%?

2007-10-01 07:38:39 · 2 answers · asked by eclipsegt_01_03 2 in Chemistry

how do i make a river it needs to be a circle and make it flow with a paddle that will spin and create electricity

2007-10-01 07:36:33 · 2 answers · asked by lawmaster_bruce 2 in Engineering

2007-10-01 07:35:27 · 8 answers · asked by robin c 1 in Mathematics

at the place i work we have 4 pine trees (about 35-45 feet tall) and around 2 of them is a deck with two square holes around the trunk of the tree. around this time i noticed the two trees surrounded by the deck are loosing little pices of branches about 4-5 in long and the two trees look less full in needles as te other 2 around them. i have worked here for 3 years and never noticed this before. does anyone know whats wrong?

2007-10-01 07:35:06 · 5 answers · asked by Dan D 2 in Agriculture

Thanks to everyone who helped with previous answers on fruit now its vegetables for grandaughters homework thanks againx

2007-10-01 07:34:52 · 2 answers · asked by geri 1 in Botany

A freight train has a mass of 1.0 107 kg. If the locomotive can exert a constant pull of 7.0 105 N, how long does it take to increase the speed of the train from rest to 78 km/h?

2007-10-01 07:34:21 · 2 answers · asked by Foxychick 1 in Physics