Science & Mathematics - 30 September 2007

2007-09-30 13:42:20 · 2 answers · asked by Anonymous in Zoology

I'm really stumped on this one; can anyone help me please?

The number N of bacteria in a culture is given by the model

N = 100e^kt

where t is the time (in hours). If N = 300 when t = 5, estimate the time required for the population to double in size.

Don't just give the answer; that is of no use to me. Step by step explanation please.

2007-09-30 13:40:07 · 5 answers · asked by ? 2 in Mathematics

how do you graph x=y squared-can someone do it on paint or something or explain or provide a link?
is y a function of x?

2007-09-30 13:40:06 · 10 answers · asked by yellowducks 1 in Mathematics

Find C such that polynomial function f(x)=4x^3 + Cx - 27 has a double root

2007-09-30 13:39:03 · 1 answers · asked by Jake W 3 in Mathematics

more active metal in each reaction:
2Li + Cu2+ to form 2Li+ +Cu
Cr + 3 V3+ to form 3 V2+ + Cr3+
Cd + 2 Ti3+ to form 2 Ti 2+ +Cd2+

2007-09-30 13:38:30 · 1 answers · asked by Anonymous in Chemistry

I need to come up with a few ideas for science fair, but I'm drawing a blank. I'm interested in nutrition, and so far I have: Which citrus fruit (out of lime, lemon, orange, tangerine and grapefruit) provides the greatest quantity of vitamin c? This is high school science fair for honors students, and last year I competed at the state level, so no "baking soda volcanos". This science fair is pretty extreme (in other words, up until 2 am from now until january), so I need generally advanced topics. Any suggestions?

2007-09-30 13:38:29 · 2 answers · asked by Tomboy with girly tendencies 4 in Chemistry

I need to come up with a few ideas for science fair, but I'm drawing a blank. I'm interested in nutrition, and so far I have: Which citrus fruit (out of lime, lemon, orange, tangerine and grapefruit) provides the greatest quantity of vitamin c? This is high school science fair for honors students, and last year I competed at the state level, so no "baking soda volcanos". This science fair is pretty extreme (in other words, up until 2 am from now until january), so I need generally advanced topics. Any suggestions?

2007-09-30 13:38:02 · 3 answers · asked by Tomboy with girly tendencies 4 in Medicine

I want names with parts of plants as sources for Vitamin B12,Give details please.

2007-09-30 13:37:59 · 12 answers · asked by Nanabhau K 1 in Medicine

2007-09-30 13:37:43 · 2 answers · asked by markusa_j 1 in Mathematics

have been reduced:
Cl2+I2 to form I2 + Cl-
WO2+H2 to form W + H2O
Ca + H2O to form H2 + Ca(OH)2
4Al + 3O2 to form 2Al2O3

2007-09-30 13:33:03 · 1 answers · asked by Anonymous in Chemistry

K*2CO*3

2007-09-30 13:27:05 · 2 answers · asked by (: Muffin Man :) 2 in Chemistry

Mg+O2 form to
Zn+HCl form to
Zn+Cu2+ form to

2007-09-30 13:26:50 · 4 answers · asked by Anonymous in Chemistry

(3x)/(x+1)
at point (1, 1.5)
i got
y=(3/4)x+(5/4)

2007-09-30 13:25:41 · 3 answers · asked by m_carl 1 in Mathematics

2007-09-30 13:23:29 · 1 answers · asked by Mario A 1 in Physics

I know when a human is sleeping, the human body is in form of hibernation. But why does it decice to wake up, after about 8 hours or so (Apart from a person needing to get up to things)?

2007-09-30 13:23:24 · 20 answers · asked by Fusion 7 in Biology

What would any one or direct me to the diagram formation for K, potassium,, So4, plus if you can please Na sodium, Po3?

2007-09-30 13:23:08 · 2 answers · asked by Steven V 2 in Chemistry

2007-09-30 13:21:22 · 5 answers · asked by lak3rz08 2 in Weather

Ugh I really need help on that one, anyone?

2007-09-30 13:19:39 · 2 answers · asked by Anonymous in Chemistry

9x^2-67-1112

I need to put it in ( )( ) form, so I need to use foil..... but, it's a little hard.

2007-09-30 13:15:46 · 5 answers · asked by DeLeon Leon 2 in Mathematics

Currently, I'm considering moving to a new area of the world but I'm unaware of anyplace that may have at least some of the factors I'm looking for. Does anyone know of a region that holds some of these characteristics?

1. Is somewhere open, and not surrounded by wildlife to a great degree (has sparse trees on the land, but enough to give good portions of shade, without bringing with it wildlife)

2. Is a region that has a warm summer, as opposed to hot, and a winter cold enough for snow.

3. Is someplace that has generally small, non-poisonous spiders.

4. Preferably, the area is English-speaking. However, this isn't a must.

I'll add more characteristics if needed. but for now, any serious answers would be greatly appreciated. Thank you in advance.

2007-09-30 13:14:56 · 9 answers · asked by StarBliss 2 in Geography

I've always been really open to the fact that their are spirits and never been scared of them (I'm 14). We've always had weird things happen in our house, doors slamming, tv/radios turning on and off, just things like that. Lately I keep seeing things though I know this sounds crazy, but I am. I swear I've seen a little boy and older man in our house, I've seen the man a few times. I feel like I'm going nuts! I told my parents and they just kinda laughed it off. Could I really be seeing spirits? Why am I seeing them all of a sudden? Why isnt anyone else in my house seeing them?

2007-09-30 13:13:45 · 16 answers · asked by Small♥Town♥Girl 6 in Paranormal Phenomena

determine the coordinates of the vertices of the triagngle formed by the lines: (algebraic solution)
2x + 5y = 16
4x - 3y = 6
3x + y = -2

Find the EXACT coordinates fo the centroid
(you solution should be algebraic)

2007-09-30 13:13:16 · 1 answers · asked by xx_jewels 2 in Mathematics

In a recent year a baseball team paid six times as much to their ace pitcher as they paid to their shortstop. If they paid $42 million for the two salaries, what did they pay each player?

So, how do I find out

1. What was the pictures salary (millions of dollars)
2. What was the shortstop's salary?

Thanks.

2007-09-30 13:11:53 · 2 answers · asked by Question Asker 1 in Mathematics

A backpack full of blocks weighing 60.0N rests on a table in a physics laboratory classroom. A spring with a force constant of 160N/m is attached to the backpack and pulled horizontally. If the backpack begins to slide when the spring (k=160N/m) strectches by 2.40cm, what is the coefficent of the static friction between the backpack and the table?

2007-09-30 13:08:26 · 1 answers · asked by Anonymous in Physics

Has any one seen him, i would like to hear your comments and reviews if you have.

2007-09-30 13:07:15 · 4 answers · asked by Anonymous in Parapsychology

I've always been really open to the fact that their are spirits and never been scared of them (I'm 14). We've always had weird things happen in our house, doors slamming, tv/radios turning on and off, just things like that. Lately I keep seeing things though I know this sounds crazy, but I am. I swear I've seen a little boy and older man in our house, I've seen the man a few times. I feel like I'm going nuts! I told my parents and they just kinda laughed it off. Could I really be seeing spirits?

2007-09-30 13:05:25 · 10 answers · asked by Small♥Town♥Girl 6 in Other - Alternative

trying to figure out which is more expensive brfore I switch.

2007-09-30 13:01:26 · 1 answers · asked by Joseph F 1 in Engineering

How many two-digit numbers exist such that when the product of its digits is added to the sum of its digits, the result is equal to the original two-digit number? List the numbers. Explain your reasoning.

2007-09-30 13:00:56 · 6 answers · asked by Coolkid81 3 in Mathematics

2007-09-30 12:59:41 · 3 answers · asked by maxpowerrys 1 in Physics

2007-09-30 12:53:35 · 4 answers · asked by Anonymous in Weather