Science & Mathematics - 15 January 2007

By ptting holes in the silencer core does the power of the bike increase???
usually i hear people saying that they would put holes in the silencer core of the bike and would get more power ... especially in an RX
i somehow feel that only the noise increases and not the power...
please clarify...

2007-01-15 17:26:59 · 4 answers · asked by Anonymous in Engineering

Solve:  - a/4 >_16  

A.) a_< -64
B.) a >_-4
C.) a>_-64
D.) a>_64

2007-01-15 17:23:59 · 8 answers · asked by Anonymous in Mathematics

Simplify:  1/3 (6a -3)  

A.) 2a – 1
B.) 2a – 19
C.) 18a – 1
D.) 3a + 1

2007-01-15 17:23:06 · 8 answers · asked by Anonymous in Mathematics

What is the right answer?

A.) y = - ½
B.) y = ½
C.) y = 2
D.) y = -2

2007-01-15 17:22:15 · 4 answers · asked by Anonymous in Mathematics

What is the right answer?

A.) a = 7
B.) no solution
C.) a = 1
D.) a = - 19/2

2007-01-15 17:21:33 · 12 answers · asked by Anonymous in Mathematics

Evaluate:  a - b/ ab when a = 2 and b = –8  

A.) -5/8
B.) 3/8
C.) 5/8
D.) -3/8

2007-01-15 17:20:44 · 8 answers · asked by Anonymous in Mathematics

I know you can call H+ a proton since that is what it is but can you call H- an "electron" since its made of two electrons and one proton?

2007-01-15 17:15:31 · 7 answers · asked by mrmao123 2 in Biology

1) MR. hills drives to work in Toronto,. ONe day his average speed going to work was 80km/h but returning it was 70km/h. If his total traveling time was 3 hours
how far from toronto is his home?

2) Six men can eat each a pizza in 2 mins. How long would it take all six men to eat one pizza?

3) My 5 brothers can each eat a whole roast chicken in 10 m ins. i can eat one in 8 mins. How long would it take all six of us to eat 2 chickens?

PLZZZZZZ tell me how u did. I get really confused by this problems..

2007-01-15 17:12:41 · 11 answers · asked by Chocogal 7 in Mathematics

A.) <
B.) >
C.) _>
D.) _<

2007-01-15 17:10:33 · 6 answers · asked by Landon J 1 in Engineering

2007-01-15 17:10:23 · 4 answers · asked by Ganesh 1 in Physics

The formula for finding area of a triangle is A = ½ bh.  If the base of a certain triangle is 5 in. and the height is 12 in., what is its area?

A.) 120 in.2 (2 is subscript)
B.) 60 in.2
C.) 30 in.2
D.) 240 in.2

2007-01-15 17:09:52 · 5 answers · asked by Landon J 1 in Engineering

There seems to be a debate over Evolution & Creation.

I have a question for Evolution believers, all the evidence I have seen shows the opposite, mutation & natural selection remove information.

Can you show me one case of increased information since this is what evolution is based on?

2007-01-15 17:08:13 · 10 answers · asked by Jason 3 in Biology

A(n) __________________ is any positive or negative whole number or zero.  

A.) integer
B.) rational number
C.) irrational number
D.) real number

2007-01-15 17:07:41 · 13 answers · asked by Landon J 1 in Engineering

2007-01-15 17:07:07 · 5 answers · asked by chess_e4_pr 1 in Biology

A.) -1
B.) -2
C.) 0
D.) 2

2007-01-15 17:06:45 · 8 answers · asked by Landon J 1 in Engineering

A baseball (mass=0.14 kg) traveling 30 m/s moves a fielder's glove backward 30 cm when the ball is caught. What was the average force exerted by the ball on the glove?

something to do with (1/2)(m)(v²), me thinks...and it's supposed to be one of the easier questions, but I'm lost..

if someone could give me a lead or hint, that'd be great.

2007-01-15 17:06:36 · 3 answers · asked by Space Cadet 3 in Physics

2007-01-15 17:04:16 · 2 answers · asked by ladyspades08 1 in Chemistry

Please go to the link for the whole question, since there is a diagram involved. http://i141.photobucket.com/albums/r74/magicalplay/AnhsChemhw.jpg

2007-01-15 17:01:25 · 1 answers · asked by magicalplaygirl 1 in Chemistry

In his backyard he has a rectangular pool that measures 30 feet by 15 feet. Jon’s entire back yard is grass except for the swimming pool. What is the total area of Jon’s back yard that has grass? Do not forget to show your work.
I HAVE THE ANSWER BUT I NEED TO BE SURE

2007-01-15 17:00:58 · 7 answers · asked by princess 1 in Chemistry

2007-01-15 17:00:02 · 5 answers · asked by dewgongoo 2 in Mathematics

2007-01-15 16:58:26 · 1 answers · asked by JOSELUIS S 1 in Engineering

(1+e^x)/(1-e^x) - what is the inverse

thanks for any help

2007-01-15 16:57:44 · 4 answers · asked by Chris 1 in Mathematics

2007-01-15 16:57:01 · 12 answers · asked by jodigurl1978 1 in Geography

express the given quanity as a single logarithim

ln x +(a ln y) - (b ln z)

2007-01-15 16:56:34 · 4 answers · asked by Chris 1 in Mathematics

Can there be a blizzard in California? Can it snow? Okay, is it at least possible for the temperature to get down to freezing?

2007-01-15 16:54:24 · 5 answers · asked by Alice 2 in Weather

2007-01-15 16:54:01 · 4 answers · asked by avinav 1 in Mathematics

I need help solving this. What answer do you get?
Solve: (-8) / (-4)
-------------
(-12) / 3

A.) 2
B.) - ½
C.) -2
D.) ½

2007-01-15 16:52:20 · 7 answers · asked by Anonymous in Mathematics

A.) Identity
B.) Additive Inverse
C.) Reflexive
D.) Multiplicative Inverse

2007-01-15 16:50:59 · 6 answers · asked by Anonymous in Mathematics

You Don't have to answer all of these questions, but please answer in full.

1. I know that if you were to add a (-) to an element it means there is one extra electron
ie: Cl- P+ 17 e- 18 n0 14
(correct me if I'm wrong and say why)

Now what I am confused about is what do you do if it is Cl+? How wuld you determine the number of protons, neutrons, and electons? Why? I need as much information as I can get for this!!!


2. How mant protons and neutrons are in this isotope:

65
30 Zn


Explain please!!

2007-01-15 16:49:57 · 5 answers · asked by blackfever08 2 in Chemistry

2007-01-15 16:49:31 · 5 answers · asked by dundundun 1 in Biology