Science & Mathematics - 15 November 2007

Please explain how you got this answer. Thank you so much!!!

2007-11-15 09:11:11 · 1 answers · asked by furikuri405 1 in Chemistry

I'd call them space jellies. I think they look like bioluminescent jellyfish viewed from above.

2007-11-15 09:10:48 · 2 answers · asked by landonwebb 2 in Astronomy & Space

it is an eleventh grade math riddle/problem but I do not know how to get the answer.

2007-11-15 09:10:16 · 8 answers · asked by Anonymous in Mathematics

The mass of gas A in containerA is 0.34g and the mass of gas B in containerB is 0.48g
a.which gas sample has the most molecules present?explain
b. which gas sample has the largest average kinetic energy. explain.
c. which gas sample has the fastest average kinetic velocity? explain
d. how can the pressure in the 2 containers be equal to each other since the larger gas B molecules collide with the container walls more forcefully?

My answers: can someone please check me? if anyone can give me a better explanation than my vague ones, it would be appreciated!!
a) both gas samples have the same molecules because the two gases are at STP
b) They are equal in the average kinetic energy because the average kinetic energy is proportional to the temperature and they both are under the same temperature.
c) Gas A has the fastest average velocity because it has a smaller mass (any equation i can use to prove this?)
d) gas A collides with the wall more frequently

2007-11-15 09:09:40 · 1 answers · asked by chrysanthemum11220 2 in Chemistry

An airplane flies at an an average speed of "K" mph. How far will it fly at that rate in 90 minutes? Write the equation. Let "N" stand for the answer ( Hint: convert 90 minutes to hrs. use D=rxt to write the equation)

2007-11-15 09:08:12 · 7 answers · asked by bodigger 1 in Mathematics

2007-11-15 09:07:33 · 2 answers · asked by Anonymous in Physics

With the drought causing such problems in the area, di we not have the technology and/or resources to assist them? I would also wonder why desalination plants are not being setup on a large scale for future droughts.

2007-11-15 09:03:58 · 3 answers · asked by Anonymous in Weather

2007-11-15 09:02:51 · 2 answers · asked by baby_j 1 in Physics

This is one more i am stuck on. L- Hospitals Rule

Find the limlt. Use L'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. If L'Hospital's Rule doesn't apply, expla!n why.

1. lim t-->0 for ( e^(3t) - 1 ) / t

2007-11-15 09:01:24 · 4 answers · asked by brobo8 1 in Mathematics

I'm studying for a test and I need help!

Question:
find the value of the three primary trigonometric ratios for angle A

A is opposite to 4 and adjacent to 8

three primary trig ratios = sin, tan and cos

for sin i looked at the answers and it's 1/square root of 5

how did they get this answer??!?

thanks!

2007-11-15 08:58:47 · 3 answers · asked by Besch 4 in Mathematics

Hi im stuck on this one. Anyone got a step by step. Thanks
It has to do with Rolles Theorem, and mean value theorems.

1. Show that the equation 2(x) -1 - sinx = 0 has exactly one real root

2007-11-15 08:57:55 · 2 answers · asked by brobo8 1 in Mathematics

im stuck on 3-5, and help appreciated.

1. Flip a coin 5 times and record the outcomes here.
H=2/5 T=3/5
2. Start again. Flip the coin 25 times and keep track of the outcomes. Record them here.
H=11/25 T=14/25

Draw a histogram from the data in question 1, and a separate histogram from the data in question 2. Also draw a histogram displaying the theoretical probability of head and tail outcomes. Use these to answer questions 3-5.
3. Verify that the sum of the experimental probabilities of flipping heads or tails add up to 1. Check both sets of your data. Show your work.
4. Did you notice that your experimental data from question 2 was closer to the theoretical probability than your data from question 1? Explain briefly using your data to support your answer.
5. Predict the experimental probabilities of flipping heads or tails if you flipped the coin a total of 100 times.

2007-11-15 08:56:05 · 1 answers · asked by Anonymous in Mathematics

Or is it possible for magnets to be used to draw the sattlites and shuttles close to the landing dock???

2007-11-15 08:54:58 · 5 answers · asked by MizzyMac 2 in Astronomy & Space

which one of these is the strongest bases:

a) NH2 or NH3
b) ClO3 or ClO2
c) Cl3CCOO or Cl2HCCOO

pick one strongest bases from a b and c...plz help i cant seem to get it rite

2007-11-15 08:49:07 · 2 answers · asked by Anonymous in Chemistry

What is the wavelength (m) of a radio frequency is 162.5 MHz ??

2007-11-15 08:48:40 · 4 answers · asked by killakam2422 1 in Physics

To pull a wagon across a lawn with constant velocity, you have to exert a steady force. Reconcile this fact with Newton's first law, which says that motion with constant velocity requires no force.

Please help!

2007-11-15 08:48:01 · 3 answers · asked by mooncutie256 1 in Physics

i have electricity class and have problem answering these questions please help me the chapter were on is Sources of electricity , Chemical Energy


1) By generating electricity through the use of chemicals and their reation with other material - You have created _____________


2) The simple ______________ is a good example of chemical energy production.

3) _______________ material , in a cell provides a path for electricity .

4)the chemical inside a dry cell react with the _____________
and the carbon rob to produce electricity.

5)_____________ lights are a common application of dry cell .

2007-11-15 08:46:28 · 2 answers · asked by sweethoney9079 4 in Chemistry

Two balls, of masses mA = 36 g and mB = 76 g are suspended. The lighter ball is pulled away to a 60° angle with the vertical and released.

(a) What is the velocity of the lighter ball before impact? (Take the right to be positive.)
I got the answer to this and it is 1.71, what I can't figure out is the next questions.

(b) What is the velocity of each ball after the elastic collision?
(c) What will be the maximum height of each ball (above the collision point) after the elastic collision?

This is due soon, so any help is greatly appreciated.

2007-11-15 08:44:15 · 1 answers · asked by mookle_x 1 in Physics

2007-11-15 08:38:51 · 3 answers · asked by pickneyjc 1 in Physics

How do bears poop? Do they squat or lift a leg? I've never seen it myself so i really need to know

2007-11-15 08:35:39 · 5 answers · asked by grrrlgenius 2 in Zoology

I came across this site www.missiontospace.org and it has a facebook page about a free trip to space. What do you think? its real?

2007-11-15 08:34:20 · 3 answers · asked by Anonymous in Astronomy & Space

2007-11-15 08:31:17 · 2 answers · asked by leigh d 1 in Weather

The activity of a sample drops by a factor of 10 in 8.0 minutes. What is its half-life?
_______________ min

2007-11-15 08:30:26 · 1 answers · asked by Jessie L 2 in Physics

Determine the value(s) for which each expression is undefined.

(-n2 + 36)
---------------------------
(n - 6) (n2 + 12n + 36)

2007-11-15 08:30:18 · 7 answers · asked by kim_jim25 1 in Mathematics

2007-11-15 08:30:16 · 11 answers · asked by Jelsie R 1 in Mathematics

2007-11-15 08:27:34 · 8 answers · asked by Jelsie R 1 in Mathematics

If someone is 181cm tall, how many inches is that? 5' what?

2007-11-15 08:22:04 · 6 answers · asked by Anonymous in Mathematics

2007-11-15 08:19:34 · 3 answers · asked by Cinderella 1 in Biology

2007-11-15 08:18:26 · 7 answers · asked by Jelsie R 1 in Mathematics

I am doing an assignment for my math class and i was wondering why that occurs?

2007-11-15 08:17:21 · 5 answers · asked by Anonymous in Mathematics