Science & Mathematics - 25 November 2006

2006-11-25 11:51:27 · 4 answers · asked by Anonymous in Astronomy & Space

please help! :)

2006-11-25 11:50:06 · 3 answers · asked by purple_pandaz 2 in Chemistry

2006-11-25 11:48:22 · 8 answers · asked by Bill J 1 in Geography

I know arctan (-1) = 3pi/4 but does it also equal 7pi/4? My book only lists 3pi/4 as an answer...
When you write 3pi/4 as the answer, is 7pi/4 implied? Or am I wrong and arctan (-1) is not equal to 7pi/4? Please explain.
Thanks

2006-11-25 11:48:12 · 6 answers · asked by ¡Jessica! 4 in Mathematics

2006-11-25 11:47:27 · 15 answers · asked by geller 1 in Biology

i know that is no air on the moon but does that mean that we can not literally "breath out" and " breath in"?

2006-11-25 11:45:08 · 7 answers · asked by      7 in Astronomy & Space

They start changing colour after about 2, 3 days of being indoors, except for their big golden eyes

2006-11-25 11:42:31 · 3 answers · asked by Anonymous in Zoology

Math is numbers,period.no letters,no symbols.

2006-11-25 11:41:45 · 14 answers · asked by Anonymous in Other - Science

2006-11-25 11:39:40 · 5 answers · asked by jboxman7 2 in Chemistry

2006-11-25 11:37:09 · 4 answers · asked by Anonymous in Geography

I was wondering if the wood base would crack or wear away over time, because I was thinking of purchasing one, and was stuck between the more expensive but durable? ones, and the less expensive wood-base ones.

2006-11-25 11:35:49 · 1 answers · asked by Anonymous in Other - Science

My weight is 52 kg.

2006-11-25 11:34:54 · 5 answers · asked by Anonymous in Physics

And the person next to you says something would you hear them? Or would there be some sort of delay before you heard their voice?

2006-11-25 11:30:48 · 6 answers · asked by DialM4Speed 6 in Other - Science

2006-11-25 11:30:27 · 9 answers · asked by Anonymous in Astronomy & Space

2006-11-25 11:29:49 · 4 answers · asked by Anonymous in Engineering

2006-11-25 11:29:44 · 28 answers · asked by levelofluck 1 in Mathematics

For a 9.75×102 g sample of iron, how much energy is required to raise the temperature from 20.2°C to 28.8°C?
(Assume that the heat capacity is constant over this temperature range.)
What is the molar heat capacity of iron?

2006-11-25 11:27:22 · 1 answers · asked by confused 1 in Engineering

2006-11-25 11:26:54 · 6 answers · asked by Eddie R 2 in Parapsychology

2006-11-25 11:24:57 · 25 answers · asked by Anonymous in Biology

2006-11-25 11:24:23 · 10 answers · asked by candy babe 2 in Medicine

2006-11-25 11:23:02 · 9 answers · asked by Anonymous in Geography

WHAT are some of the simple question that I can do survey on......Please help me out...

2006-11-25 11:21:43 · 2 answers · asked by Dominator. 2 in Mathematics

A 67.0 g ice cube can slide without friction up and down a 31.0 slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.0cm . The spring constant is 26.0 N/m.

answer in cm.

2006-11-25 11:21:35 · 1 answers · asked by iknowu2jan 3 in Physics

Thermus thermophilus is a bacteria which is able to survive under very unfavoured discription, e.g. hot temperature and deep pressure. It is believed it can do so because of its ability to replenish cells. However, can anyone provide any details on when and who discovered this bacteria, and if any possible side effects it will have on humans if they use it too extensively?

2006-11-25 11:20:48 · 2 answers · asked by confused 1 in Biology

This is for home school.

2006-11-25 11:20:31 · 1 answers · asked by Dorcas 3 in Other - Science

A 50.0 g projectile moves to the right with a speed of 2.00 m/s toward a 0.500 kg stationary and uniform 50.0 cm long thin rod pivoted at its center of mass wich is free to rotate about this frictionless pivot ( in the center). What is the linear speed of the ends of the rod if the projectile undergoes a totally inelastic collision with the very end of the rod? The rod is mounted horizantally and you may ignore any effects due to gravity.

2006-11-25 11:17:47 · 1 answers · asked by googoosh g 1 in Physics

I don't think it's hard, but it's confusing sometimes.

2006-11-25 11:11:03 · 6 answers · asked by ♥ Lady in Pink ♥ 2 in Mathematics

2006-11-25 11:09:58 · 9 answers · asked by Anonymous in Biology

A viscoelastic bead describes the shape but it is not the name of the shape.

2006-11-25 11:08:59 · 3 answers · asked by blue_eagle74 4 in Engineering

Its for a chemistry project, I need help, my teacher hasnt been in class for the last week, so I have absolutely no idea what "mol" is.

Here are the exact steps:
1. Cut out 3 nutrition facts labels from three different foods. One should be high in sodium compared to the others.
2. Look for the total grams of "Sodium" per serving.
3. Using dimensional analysis, show haow many moles and atoms of sodium you are eating for one serving.
4. How many servings of food would you have to eat in order to reach the maximum daily recommended amount of sodium.

Ive got the three labels, they are:

1. Frozen Waffles - 480mg of sodium - 20% daily value 2.Gatorade - 110mg of sodium - 5% daily value
3.Juice - 35mg of sodium - 1% daily value.

2006-11-25 11:08:01 · 1 answers · asked by alan m 2 in Chemistry