Science & Mathematics - 6 January 2007

If Leah is 6 years older than her sister, Sue, and John is 5 years older than Leah. And Leah's and John's age both added up together is 41.

Then how old is Sue?

Help me I've trying to solve this problem for 15 minutes! Any way to solve it showing the steps.

2007-01-06 03:33:32 · 16 answers · asked by Anonymous in Mathematics

1. Why do the same notes on a trumpet and on a saxophone sound different when both are played with the same pitch and loudness? Explain.

2, A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. Does the loudness of sound produced depend on the frequency of oscillation, the amplitude of oscillation, the kinetic energy of oscillation, or all of these? Explain.

3.Which is a more objective measurement - sound intensity or loudness? Defend your answer.

4. How is an electronic organ able to imitate the sounds made by various musical instruments? Explain.

5. Why does your voice sound fuller in the shower?

6. How many octaaves does normal human hearing span? How many octaves are on a common piano keyboard?

Thanks a million =)

2007-01-06 03:32:45 · 4 answers · asked by Anonymous in Physics

2007-01-06 03:30:14 · 2 answers · asked by crissie15 1 in Chemistry

I know that some animals like Manatees eat marine plants, and that larvae of some smaller marine animals use them for shelter and protection, but can anyone think of any other specific examples on how they help the survival of marine animals?

2007-01-06 03:29:22 · 6 answers · asked by TeganMc 2 in Zoology

ok so, i stil dont get what a mole means or is. and what the different conversions between a mole and molarity are and stuff. chemistry has been getting ridiculously confusing.

2007-01-06 03:28:47 · 12 answers · asked by defenderof thehumanright 3 in Chemistry

The distance from a point C to the line AB is the length of the segment from C ___________ to AB.

A. perpendicular
B. widthwise
C. lengthwise
D. parallel

2007-01-06 03:25:22 · 6 answers · asked by Rattiesrule 2 in Mathematics

My family is interested in tracing our lineage both african, indian and european. Are there any sites on line or comapnies that can help in that search?

2007-01-06 03:24:50 · 4 answers · asked by robbiegirl 1 in Biology

An astronaut would be "cooked" by the 700 degrees celsius temperature of the exosphere, even in the shadow of the ISS

2007-01-06 03:24:45 · 21 answers · asked by Anonymous in Earth Sciences & Geology

Okay, I need help because my research found nothing. Part of a project I have is to make a marker line on a piece of paper and dip the paper in water to see how many colors it bleeds (it basically makes a colorful butterfly when done properly). So how does that work? Is it diffusion or something else? And why does it bleed different colors?

2007-01-06 03:24:35 · 1 answers · asked by Anonymous in Chemistry

2007-01-06 03:24:30 · 6 answers · asked by markusonalikus 1 in Earth Sciences & Geology

how do i solve this please?

3.16 x 10^-3 x (1- A) = A

I want to find A. THanks

2007-01-06 03:24:22 · 4 answers · asked by Anonymous in Mathematics

2007-01-06 03:24:18 · 13 answers · asked by horsegirl 1 in Astronomy & Space

Agreed that yahoo answers and wikipedia make a vital contribution, but how can knowledge previously only available in text books become accessible to the masses.

2007-01-06 03:22:56 · 4 answers · asked by thejur 3 in Other - Science

2007-01-06 03:19:55 · 21 answers · asked by Anonymous in Mathematics

2007-01-06 03:18:53 · 2 answers · asked by vijay 1 in Zoology

2007-01-06 03:16:48 · 10 answers · asked by SHEILA D 1 in Physics

2007-01-06 03:16:40 · 25 answers · asked by NEOSHET 6 in Geography

What could we expect to happen @ the ER to her?

2007-01-06 03:15:25 · 9 answers · asked by hannah 1 in Medicine

A chocolate manufacturer uses an equilateral triangular prism package. If the volume of chocolate to be contained in the package is 400cm^3, what dimensions of the package will use the minimum amount of materials?

2007-01-06 03:14:49 · 4 answers · asked by Anonymous in Mathematics

a.(a x b ) x c = ax ( bx c )
b.(a + b) + c = a +(b+c)
c. (a+b) x c = a+(c+c)

2nd question
what is associative property of multiplacation?
a.(a+b) + c=a + (b x c)
b.(a+b) + c =a x (b x c)
c.(a x b) x c =a x (b x c)

3rd question
which of these illustrates the associative property pf addtion?
a.6+4=4+6
b.6 + (4+2)= (6+4) +2
c. 6 + 9 +5=5+9+6

4th question
which of these illustrates the associative of multiplacation??
a.6 x (9x1)=(6x9)x 1
b. 6 x (91) = (69) x 1
c. 6x9x1= 1x9x6

5th question
what is equal to4(7a)?
a.28
b.11a
c.(4x7)a

6th question
(y x 6)5=
a.30y
b.11y
c.(5=y)6

7th question
2 x (4 x 6)=
a.2 x4 x6
b.(2 x 4) x6
c. bot a and b

8th question
what property is shown by this statement: 1(9x2) = (1x9)2
a.commutative property of multiplacation
b. associative property of multiplacation
c. associative property ofaddition

If a=b=c, a =?
a.c - b
b. b-c
c. b+ c

2007-01-06 03:14:19 · 4 answers · asked by London-England- 1 in Mathematics

2007-01-06 03:11:46 · 12 answers · asked by Anonymous in Zoology

2007-01-06 03:11:09 · 6 answers · asked by Anonymous in Biology

2007-01-06 03:08:52 · 6 answers · asked by Bhupinder G 1 in Engineering

2007-01-06 03:07:29 · 3 answers · asked by prince 1 in Engineering

How do you find the inversr to a matrix?

2007-01-06 03:03:29 · 11 answers · asked by Anonymous in Mathematics

2007-01-06 03:02:41 · 3 answers · asked by SHEILA D 1 in Engineering

The snake was a big, beige and shiny with big brown spots

2007-01-06 03:02:27 · 6 answers · asked by prismed405 1 in Physics

why a bicyle can stand in balance when its riden but it will fall down when we stop cycle it

2007-01-06 03:00:41 · 4 answers · asked by kt 2 in Physics

PLS!NO PLUTO,PLUTO is NOT a PLANET

2007-01-06 03:00:38 · 13 answers · asked by cal9492 1 in Astronomy & Space

Hubble and Chandra get pictures of deep space, other galaxies. Why can't we get pics of closer objects like other planets? Someone once said it would be like taking a picture inside your house, you wouldn't be able to see much, just one side of one room. But with our advanced technology, looks like we could get close up pics of other planets. We are closer to them than galaxies in deep space. Why not?

2007-01-06 02:56:49 · 11 answers · asked by ? 4 in Astronomy & Space