Science & Mathematics - 26 September 2007

math question

2007-09-26 14:47:29 · 10 answers · asked by frm11dogs 1 in Mathematics

Does the velocity of the two carts as they reverse direction increase, decrease, or stay the same?

Notes: the carts do not hit each other, but the magnets make them reverse direction. This is a frictionless, airless environment, no forces acting other than the force of the carts being initially pushed.

2007-09-26 14:47:23 · 1 answers · asked by _myspace.com/joannaway_ 1 in Physics

i need the this power in standard form.

2007-09-26 14:47:04 · 9 answers · asked by Anonymous in Mathematics

I am replacing my existing electric range with a gas range. I know that I must change the outlet so that I will have 110, however I do not want to run new lines if I can avoid it. I have been told that the new gas stove must be rewired using a different gauge of wire.

Since the existing wire is capible of handling 50A, why would the electrician need to run new wires for a 110V 20A circuit? Are all 110V outlets required by code to be 10 gauge or would any gauge that is rated for the voltage and amperage be acceptable?

2007-09-26 14:44:16 · 4 answers · asked by Karen S 3 in Engineering

Bob and Bill were washing cars. Bob can wash a car in 6 minutes. Bill can wash a car in 8 minutes. How long will it take if Bob and Bill wash a car together?

P.S. The answer is NOT 7.

2007-09-26 14:44:07 · 20 answers · asked by abcw 3 in Mathematics

How do I solve this problem:
In a fable, a poor man received a reward of 2 grains of rice of rice on one day. On the second day, he received 2 to the 2nd power grains of rice. On the third day, he received 2 to the 3rd power. What is the total amount by 10 days??

Is there a faster formula I can use other than add each day's up??

2007-09-26 14:42:02 · 5 answers · asked by rocksterenergy53 3 in Mathematics

ok I have a math cross word puzzle and I have one answer left to finish it. the definition is a mathematical phrase containing numbers and operation. the word has 10 letters the 5th letter is e

2007-09-26 14:41:40 · 1 answers · asked by SherryBerry<3 2 in Mathematics

Could anyone tell me anything I need to know about "e" when talking about derivitives. Such as: "e" derivitive, 2nd derivitive, and how its used in product and quotient rule

2007-09-26 14:41:31 · 2 answers · asked by GHAAD 4 in Mathematics

2007-09-26 14:40:21 · 5 answers · asked by gmftlove 1 in Biology

Chemistry students analyzed the contents of rust. They found that it is made up of iron and oxygen. Tests on samples of rust gave this data.


Amt Of Rust (G)
50
100
135
150

Amt. Of Iron (G)
35.0
70.0
94.5
105.0

Amt. Of Oxygen (G)
15.0
30.0
40.5
45.0



A. Suppose the students analyze 400 grams of rust. How much iron and how much oxygen should they find?
Show Your work.

2007-09-26 14:38:48 · 4 answers · asked by Tammy 2 in Mathematics

How much heat is absorbed when 5 grams of water is heated from 12 C to 24 C? The specific heat of water is 1 cal/gxC

2007-09-26 14:37:14 · 1 answers · asked by ♥Carebear♥ 1 in Chemistry

2007-09-26 14:33:16 · 4 answers · asked by Jim J 1 in Geography

2007-09-26 14:32:48 · 14 answers · asked by shyfello 1 in Astronomy & Space

Ok, this is driving me crazy. We have the equation y = -2tan(x+(pi/4))

So, the asymptotes aren't stretched or anything, some are still like pi/2 and -pi/2, right?

Assuming I've got that right

The pi/4 shifts the asymptotes to the right, correct? But then what are they? (pi/2)+(pi/4)? Which for some reason I can't work out....3pi/4? Gah. Help, please?

Yes, this is homework, but I'm not begging for an answer, I'm just severely confused and would rather ask someone with enough time to be on here than my already-stressed friends.

2007-09-26 14:32:03 · 1 answers · asked by Anonymous in Mathematics

An object is being acted upon by three forces and moves with a constant velocity. One force is 60N along the x-axis, the second is 75N along a direction making a counterclockwise angle of 150 degrees with the x-axis. What is the direction (in degrees) of the third force, measured counterclockwise from the x-axis?

2007-09-26 14:31:52 · 2 answers · asked by purplehaze_2005 1 in Physics

2007-09-26 14:29:38 · 4 answers · asked by kb9kahne9 2 in Mathematics

I like the Meade ones with autostar but have no idea what the EC PE and stuff like that stand for. I want something that can see pretty damn far. I dont need to see the moon, I want to see galaxies, planets and stuff like that, if that is even possible from a personal telescope. I am looking to spend about 400.00 on ebay for one. Thanks.

2007-09-26 14:25:20 · 6 answers · asked by Devin S 2 in Astronomy & Space

when it says it's 98% humidity, does this mean that it's really humid out or not. I don't understand, please clear this up for me. Thank you Susu

2007-09-26 14:24:30 · 8 answers · asked by Susu 1 in Weather

I just completed a lab where we measured the specific heat of a metal. During the lab, we had to measure the temperature of boiling water. Why did we have to do this? Shouldn't boiling water be at exactly 100'C?

2007-09-26 14:22:40 · 3 answers · asked by cmh0114 3 in Chemistry

2007-09-26 14:22:06 · 5 answers · asked by kqueen_lola 1 in Other - Science

There is a pole in a lake. 1/2 of the pole is under ground, 1/3 of the pole is in the water, and 8 ft is above ground. How long is the pole? Please show your work, I am trying to help out a neighbor kid that is totally lost.

2007-09-26 14:18:20 · 1 answers · asked by rustyrcfn 1 in Mathematics

Required: distance=s
pls.. include the formula.. tnx

2007-09-26 14:16:19 · 1 answers · asked by LUIZ 1 in Physics

1)How far will a freely falling object have fallen from a position of rest when its instantaneous speed is 24 m/s?

2)For a freely falling object dropped from rest, what is the acceleration at the following times?

a)the end of the fifth second?
b)the end of the sixth second?
c)the end of the any elapsed time?

2007-09-26 14:14:34 · 2 answers · asked by d h 2 in Physics

Hey everyone, I really need help on this problem.....its for one of my EGR classes. I emailed the teacher for help but never got back to me. If there is anyway you can help me that would be great

A Battery provides a total charge of Q= 50micro columbus in 3 milli seconds

What is the current in milliamps?

If the battery voltage is 240Volts, what is the energy generated in milljoules, over this time period

What is the power in milliWatts

2007-09-26 14:12:49 · 2 answers · asked by brettmhannan 1 in Engineering

my lil bro wants to know for homework. he looked on the web and didn't find anything. =) plz help

2007-09-26 14:11:59 · 12 answers · asked by Anonymous in Zoology

2007-09-26 14:10:21 · 3 answers · asked by C'est Comme Un Rêve 3 in Chemistry

Hey everyone, I really need help on this problem.....its for one of my EGR classes. I emailed the teacher for help but never got back to me. If there is anyway you can help me that would be great

A Battery provides a total charge of Q= 50micro columbus in 3 milli seconds

What is the current in milliamps?

If the battery voltage is 240Volts, what is the energy generated in milljoules, over this time period

What is the power in milliWatts

2007-09-26 14:03:16 · 1 answers · asked by brettmhannan 1 in Physics

Our plumber hooked up the hot water to my ice maker, saying that many people think it freezes faster because of how much energy it takes to get water temperature moving. Once it gets moving in the right direction, it can move faster and faster. Have ya heard this? Okay, so does cold water boil faster? Just wondering.....

2007-09-26 14:01:54 · 8 answers · asked by Suzi♥Squirrel 4 in Other - Science

2007-09-26 14:01:45 · 6 answers · asked by DJS 1 in Zoology

A particle of a net charge 35.6 (micro) C is placed in a uniform electric field of 730 N/C. What is the mass of the particle if it moves with an acceleration of 280m/s^2?

Please show work

2007-09-26 13:59:49 · 1 answers · asked by mastersource2005 5 in Physics