Science & Mathematics - 21 September 2007

2007-09-21 19:04:56 · 3 answers · asked by brown-greg@att.net 1 in Earth Sciences & Geology

issss itttttt....!?
0.12 m/sec2
8.4 m/sec2
1875 m/sec2

2007-09-21 19:02:18 · 3 answers · asked by Anonymous in Other - Science

0.255 N
24.5 N
3.92 N
or cannot be determined

2007-09-21 19:01:19 · 4 answers · asked by Anonymous in Other - Science

The force of gravity on Planet Y is 5.3 m/sec2. The force of gravity on Planet Z is 6.2 m/sec2. A 10 kg object would:

weigh more on Planet Y than on Planet Z
weigh less on Planet Y than on Planet Z
weigh the same on Planet Y as on Planet Z

2007-09-21 19:00:05 · 4 answers · asked by Anonymous in Astronomy & Space

Okay, I've asked a question simulair to this before and I got no straight answer on this. I have an extreme fear of tornado's and I know that hurricane's can spawn tornado's. Could a cat 5 hurricane still be a hurrican this far in-land? Or would it just be a tropical storm?

2007-09-21 18:52:40 · 4 answers · asked by kittysoma27 6 in Weather

Could we just always be in the present. Im not talking about a body aging because to me that is not at all time. Im not talking about events that have taken place before because that is not time either to me.

2007-09-21 18:50:32 · 23 answers · asked by Anonymous in Astronomy & Space

2007-09-21 18:49:13 · 7 answers · asked by Me 3 in Other - Science

2007-09-21 18:48:50 · 3 answers · asked by khorshid 1 in Chemistry

pls. help.pls show me the solutions.. tnx
Pls. help me solve dis..


1. Find the length of the side of an equilateral triangle whose altitude is 3cm shorter than a side.

2. An airplane flies 900 km against a head wind of 25kph. The plane took 15 minutes longer for this flight than with a tail wind of 25kph. How fast could the plane fly in still air?

3.Fifty-four cans are packed in some boxes so that the number of boxes is more than the number of cans in each box. Find the number of boxes used.

4. Dean and Len can type a manuscript together in 3 and 3/5 hours. Dean, working alone can type the manuscript 3 hours longer than Len. How long would it take each to type the manuscript alone?

5. A mango grove has 20 trees per acre, and the average yoeld is 300 mangoes per tree. For each additional tree per acre, the average yield will be reduced by 10 mangoes per tree. How many trees per acre will yield the maximum number of mangoes per acre, and what is the maximum number of mangoes per acre?

2007-09-21 18:43:54 · 2 answers · asked by Anonymous in Mathematics

2007-09-21 18:42:26 · 1 answers · asked by Newton 1 in Mathematics

chain rule

2007-09-21 18:37:29 · 3 answers · asked by lana 1 in Mathematics

New zealand is located at the lower part of the globe , which is practically hangging downward in the space, as compared to the northern part of the world, so the people living in new zealand should feel hanging upside down, while this is not the case why??

2007-09-21 18:36:53 · 9 answers · asked by Sir 4 in Earth Sciences & Geology

2007-09-21 18:36:06 · 2 answers · asked by emiro higure 1 in Biology

A=4000(2.7183)^.07(8)

2007-09-21 18:35:54 · 2 answers · asked by darrington2001 1 in Mathematics

Ok this is a question that i cannot figure out. Say there are 3 doors and a prize behind 1 of the doors and u get to choose any of the 3 doors. lets say u choose door 1, your odds are 1/3 so 33% of getting it right. but what if i open up door 2 and show u there is nothing behind it, then i give u the option of switching your original choice (1) to door 3. Mathematically this would not make your odds 50% but 66% to get it right. Is this correct?

The best way i can explain it is this. Say there are 1 million doors and i say to choose any door in between. you choose door 100. i then open ever door to show it's empty except door 100 and door 257,652. now are your odds still 50% between the 2 doors? do you really think you picked the right door on the very first try. I believe your odds of switching doors if given the option would go up somewhere around 99.9% in this case. Can anyone back me up on this or better explain if im right or wrong, preferably in case 1 with the 3 doors. thanks!

2007-09-21 18:32:48 · 4 answers · asked by wade 2 in Mathematics

2007-09-21 18:30:06 · 2 answers · asked by engelfeurs 2 in Astronomy & Space

One number is smaller than a second number. The sum of the squares of these numbers is 28 more than the product of the two numbers. Let x be the bigger number.
a. How will you represent the smaller number?
b. Represent the square of each number in terms of x.
c. Write the sum of the squares of the two numbers in terms of x.
d. Represent also the product of the two numbers in terms of x.
e. Write the equation and solve for x.
f. What is the bigger number?
g. What is the smaller number?

tnx..

2007-09-21 18:26:57 · 2 answers · asked by xah8 1 in Mathematics

What are the significant figures of the volume of a cube in cm. cubed with dimensions 12.6 to 12.6 to 12.6 mm. ?

Well, here is what i know. There are 3 significant figures in one of the dimensional values so you estimate to 3 significant figures. !2.6 mm. = 1.26 cm. ; 1.26^3=2.000376 ; the volume then would be 2.00 cm., leaving the trailing zeros alone.

I don't know if i am right. Someone correct me if i am wrong. My teacher didn't teach me anything about this and she expects me to be a wiz at it at the end of the weekend.

2007-09-21 18:25:31 · 4 answers · asked by Anonymous in Chemistry

after making the methanol molecule with a 3D kit and ozidizing it by removing 2 "H" atoms (not from the -OH group) and replace with an oxygen.

#1) name the substance made??

after making 2 more identical molecules, react the -OH groups.

#2) name the bond formed?
#3) write the equation for this reaction

then build a methanol and ust the acid molecules we made before. once again react the PH groups and
#4)name the bond formed????
#5) write the equation for this reaction

2007-09-21 18:14:49 · 2 answers · asked by mani_ayat_3 1 in Chemistry

2007-09-21 18:14:27 · 3 answers · asked by Rob 1 in Mathematics

2007-09-21 18:10:43 · 3 answers · asked by krypto'nstreaky 2 in Physics

after building the methane molecule with a 3D kit. we oxidize the methane by removing 2 "H" atoms and replacing with an oxygen.

#1) name the substance made explain its structure.

#2) if a hydrogen is removed from the original methane molecule and a CH3 group has been added. what substance has been made? and how does it differ from an aldehyde??

#3)add hydrogens to this molecule (break double bonds and add H). what type of molecule have you created?

2007-09-21 18:08:35 · 1 answers · asked by mani_ayat_3 1 in Chemistry

I bought tylenol extra strength gels. They contain Acetaminophen and say son the back "Do not use with any other product containing Acetaminophen." I took 5 of those today. I also bought Nyquil cold and flu gelcpaps. It contains Acetaminophen and also says on the back "Do not use with any other product containing Acetaminophen." I want to take them before i go to bed because i'm sick! What is acetaminophen? Is it dangerous? Should i mix the 2 meds?

2007-09-21 18:02:54 · 4 answers · asked by the_max85 1 in Medicine

Is it or not?

2007-09-21 18:02:43 · 2 answers · asked by Caramel 2 in Chemistry

2007-09-21 17:55:59 · 2 answers · asked by Anonymous in Other - Science

A. 94
B. 87
C. 440
D. 88

2007-09-21 17:53:23 · 12 answers · asked by Anonymous in Mathematics

I Have One On My Left Arm, But all Memory Of Abduction Has Been Erased

2007-09-21 17:49:02 · 9 answers · asked by engelfeurs 2 in Astronomy & Space

2007-09-21 17:45:28 · 5 answers · asked by Jack K 2 in Astronomy & Space

2007-09-21 17:45:22 · 3 answers · asked by Tland 3 in Medicine

Is it because they don't go through secondary growth?

2007-09-21 17:41:42 · 4 answers · asked by admode 3 in Botany