Science & Mathematics - 14 October 2007

and is it a metaphor for my life?

and can you explain that duplicate gene different protein thing to me?

2007-10-14 11:11:26 · 6 answers · asked by wild_eep 6 in Biology

I'm finding the net magnetic field at a point 10.0 cm to the right of two wires that have currents going opposite directions.

2007-10-14 11:10:37 · 1 answers · asked by Anonymous in Physics

How accurately should you measure the side of a square to be sure of calculating the area within 2% of its true value?

2007-10-14 11:10:18 · 5 answers · asked by maxpowerrys 1 in Mathematics

A mixture of oxygen and helium is 92.3% by mass oxygen. It is collected at atmospheric pressure (735 Torr). What is the partial pressure of oxygen in this mixture?

a) 299 Torr
b) 412 Torr
c) 688 Torr
d) 333 Torr
e) 446 Torr

(an explanation would be very helpful, especially what the purpose of the 92.3% would help indicate or just any help at all.)

2007-10-14 11:10:15 · 2 answers · asked by Annie T 1 in Chemistry

2007-10-14 11:09:16 · 2 answers · asked by nursesr4evr 7 in Agriculture

Please help me with the following question:) What was the purpose of tube A?
Please help me with the following question:) What was the purpose of tube A?

Procedure:
1. Prepare a stock albumen solution by adding the white of one egg to 100 mL of distilled water in a beaker. Stir until the albumen is in solution.

Place 5 mL of the albumen solution into each of four test tubes. Label the tubes A,B,C,D

Tube A- Let stand at room temperature. Measure the temperature. Determine the pH with pH paper.
Tube B - Heat the tube in a boiling water bath for 10 minutes.
Tube C - Add 2 mL of 1M HCI. Determine the pH of the solution.
Tube D - Add 5 drops of 2% AgNO3 (a salt of the heavy metal silver).

My Observations

Tube Temperature pH appearance
A 21 degrees 7 clear colourless solution
B 100 degrees 7 opaque, white substance
C 21 degrees 2 opaque, white substance
D 21 degrees 7 opaque, white substance

I have been stumped on this question for the last several days
Thanks

2007-10-14 11:08:48 · 2 answers · asked by Mark F 1 in Biology

Calculate the weight of 2.27 moles of Al2O3?

Express your answer in grams of aluminum oxide as three significant digits.

WARNING: Only provide the numerical answer. Do not include the units in the answer box. If you fail to enter your answer in the correct form, it will be counted wrong.

2007-10-14 11:08:41 · 1 answers · asked by Anonymous in Chemistry

HEY!! i need help with these problems! thank you!!!


Write each expression asa complex number in standard form:


(3+i)(4+i)


(3-4i)(4-3i)


(2+6i)(2-6i)


3+2i/3-2i


√6/√6-i




thank you so much!

=]

2007-10-14 11:08:26 · 8 answers · asked by bosstastic<3 3 in Mathematics

Please help me with the following question:) What was the purpose of tube A?
Please help me with the following question:) What was the purpose of tube A?

Procedure:
1. Prepare a stock albumen solution by adding the white of one egg to 100 mL of distilled water in a beaker. Stir until the albumen is in solution.

Place 5 mL of the albumen solution into each of four test tubes. Label the tubes A,B,C,D

Tube A- Let stand at room temperature. Measure the temperature. Determine the pH with pH paper.
Tube B - Heat the tube in a boiling water bath for 10 minutes.
Tube C - Add 2 mL of 1M HCI. Determine the pH of the solution.
Tube D - Add 5 drops of 2% AgNO3 (a salt of the heavy metal silver).

My Observations

Tube Temperature pH appearance
A 21 degrees 7 clear colourless solution
B 100 degrees 7 opaque, white substance
C 21 degrees 2 opaque, white substance
D 21 degrees 7 opaque, white substance

I have been stumped on this question for the last several days
Thanks

2007-10-14 11:08:08 · 2 answers · asked by Mark F 1 in Chemistry

a grocer displayed 66 cans of corn in the form of a pyramid which had one can on top, 2 cans below it, 3 cans below that, and so on. how many cans were there in the lowers layer?

I HAVE TO USE THE ARITHMETIC SEQUENCE EQUATIONS!!!

2007-10-14 11:06:02 · 2 answers · asked by Anonymous in Mathematics

Where does nickel fall on the reactivity series of metals?

2007-10-14 11:04:57 · 1 answers · asked by Jada 1 in Chemistry

(x)/(x-6) - (6)/(x-6) = 5???

help please...

2007-10-14 11:04:07 · 1 answers · asked by jessicamartinez40 1 in Mathematics

Hello.Here is a problem i can't solve, so i am asking your help!

Two points K and L of an elastic medium,which is doing a harmonic wave with a frequency f=90 Hz, have phases at the moment t1, phase(K)=15π/4 rad and phase(L)=3π/2 rad.How much time needs the wave to cover the distance of those 2 points???

2007-10-14 11:03:00 · 1 answers · asked by Anonymous in Physics

stoichiometry

2007-10-14 11:02:27 · 1 answers · asked by dukebasketball1992 2 in Chemistry

Okay I asked this question yesterday but I forgot to add the link to the moon chart thing. I reposted it but no one has responded to it. Anyways how accurate would you say that this moon chart is? And another thing how would I use the chart in day light savings time. I'm not sure weather GMT has daylight savings. Should I use the chart to a clock that been set back an hour or do I use it to a clock that has been set foward? here is the link. Thanks in advance
http://www.cycletourist.com/moon/index.php

2007-10-14 11:00:29 · 7 answers · asked by blackcat 3 in Astronomy & Space

3(y-1) / (5) + 4 = y???

2007-10-14 10:58:09 · 3 answers · asked by luishernandez66 1 in Mathematics

How many valence electrons does this ion have ??????????

O2-2

2007-10-14 10:57:14 · 1 answers · asked by Anonymous in Chemistry

(x-19)/(x-35) - (1)/(x) - (x-5)/(x)???

2007-10-14 10:55:56 · 2 answers · asked by ronyyang 1 in Mathematics

The ratio of similarity between two polygons is 2:3. if the perimeter of the simliar polygon is 14, find the perimeter of the larger polygon.


please help i have no clue what im doing

2007-10-14 10:54:35 · 2 answers · asked by Y0G1TH3B3AR 3 in Mathematics

heres a problem thats bugging me

12c - 4= 12c

maybe it's easy to you but it's hard.
can you show me step by step how you got the answer?

2007-10-14 10:47:37 · 7 answers · asked by Alfreda W 1 in Mathematics

while becoming a pediatrician, in school and out in the job, do you deal with major blood hands on? or are they just simple shots that will be passing by?

2007-10-14 10:45:01 · 8 answers · asked by TheFizzle 1 in Medicine

ok so combustion of Magnesium and sulfur- how do you do it?

i think:
magnesium:
Mg + O2 ---> MgO2

S + O2 ---> SO2

am i right? if not help me im lost

2007-10-14 10:44:35 · 3 answers · asked by holaaloha12345 4 in Chemistry

A Harris Interactive survey for InterContinental Hotels & Resorts asked respondents, “When traveling internationally, do you generally venture out on your own to experience culture, or stick with your tour group and itineraries?” The survey found that 23% of the respondents stick with their tour group.

In a sample of six international travelers, what is the probability that at least two will stick with their group?!?

How is this solved?

2007-10-14 10:43:27 · 2 answers · asked by Anonymous in Mathematics

2007-10-14 10:42:40 · 1 answers · asked by Anonymous in Chemistry

(-4*a)/(y) + (2*a) / (4*a) + (4*a)/(y)? Need help....

2007-10-14 10:40:32 · 4 answers · asked by luishernandez66 1 in Mathematics

"Which of the worlds highets peaks stand apart from the highest mountain ranges?"

2007-10-14 10:37:35 · 5 answers · asked by Spectrum 1 in Geography

Two planes started at the same time from the same airport and flew in opposite directions. One flew 60 miles per hour faster than the other. In 5 hours, they were 5,300 miles apart. Find the rate of each plane. Can somebody please explain to me how to solve these kind of questions?

2007-10-14 10:34:51 · 5 answers · asked by vp_nyc 2 in Mathematics

2007-10-14 10:34:32 · 5 answers · asked by Anonymous in Mathematics

Na3PO4, KI and AlCl3, respectively. These results were found by using a Universal Indicator. I have to write out a net ionic equation to explain my observations for these 3 solutions, but obviously i do not know how to do this.

Please, any help would be greatly appreciated, thanks!!!

2007-10-14 10:32:02 · 1 answers · asked by jellybean0424 2 in Chemistry

Q.1: Why are protease secreted in an inactive form and then activated only when they reach their site of action??

Q.2: Using the digestion of maltose and dipeptides as examples explain what is meant by intracellular digestion.

please help!!

2007-10-14 10:30:04 · 1 answers · asked by x.T.x 3 in Biology