Science & Mathematics - 16 November 2007

An silver block of volume 0.16 m3 is suspended from a spring scale and immersed in a flask of water. Then the silver block is removed, and an aluminum block of the same volume replaces it.
(a) In which case is the buoyant force the greatest, for the silver block or the aluminum block?
the buoyant force is the same for each
aluminum block
silver block

(b) In which case does the spring scale read the largest value?
silver block
aluminum block
the scale reading is the same for each

(c) Use the known densities of these materials to calculate the quantities requested in parts (a) and (b). Are your calculations consistent with your previous answers to part (a) and (b)?
Material Buoyant force Scale reading
silver N N
aluminum N N

2007-11-16 04:53:18 · 1 answers · asked by Butterfly <3 2 in Chemistry

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homework help??

Newton’s 2nd law says that if there is no net force exerted on a system no acceleration is possible does it follow from this that no change in momentum can occur. Why or why not

2007-11-16 04:50:22 · 1 answers · asked by blond_n_punk 2 in Physics

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Who is Aphrodite?

It is for a presentation

2007-11-16 04:50:15 · 10 answers · asked by Aimee 1 in Geography

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Which is a correct two-column proof? ( hard geometry question please help!!!)?

http://tinypic.com/view.php?pic=71mzacl&s=1

Click to see the right multiple choice answer
5 stars! whoever gets it right

2007-11-16 04:48:16 · 4 answers · asked by Anonymous in Mathematics

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Magnetic force acting on an alpha particle.?

In a particle accelerator, an alpha particle with a mass of 6.64 x 10– 27 kg is moving with a speed of 2.50 ´ 107 m/s. It is moving perpendicularly through a magnetic field of intensity 0.150 T. Using appropriate equations and method, find the radius of curvature of its path.

My question is what does the 2.5 ` mean? Ive been looking through my books and havent seen it mentioned anywhere.

2007-11-16 04:47:54 · 2 answers · asked by Anonymous in Physics

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What is this bird?

It looks like a chickadee and the same size, but has a black beak, white belly with charcoal back, wings and head.

2007-11-16 04:46:17 · 8 answers · asked by lady_of_one 1 in Zoology

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Calculate the amount of heat required to raise the temperature?

Copper metal has a specific heat of 0.385 J/g·°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0°C to 875°C.

A. 1.97 × 10−5 J
B. 1.0 × 10−2 J
C. 329 J
D. 7.51 kJ
E. 10.5 kJ

2007-11-16 04:42:11 · 1 answers · asked by Anonymous in Chemistry

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does gravity affect the direction in which plants grow?

hey im doing a project and really need to know this

2007-11-16 04:38:12 · 6 answers · asked by Anonymous in Botany

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MS Contin Where to now?

I take 3 x 100mg MS Contin per day plus 8 Panadene Forte per day for lower back pain and Peripheral Neuropathy. I also take 3 Hypnodorm at night for sleep.
I have become tolerant of this medication mix and would like to know if anyone has any ideas for alternative medication.
I have already been down the Epilim Nurontin and others path to no avail.
Please help.

2007-11-16 04:38:08 · 1 answers · asked by Anonymous in Medicine

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Is Love a word that is used by people unfamiliar with the concepts rising hormone levels?

2007-11-16 04:37:04 · 10 answers · asked by Anonymous in Biology

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what is considered to be the tree of love?

like above, what is considered the tree of love. I ask this because jack johnson referenced the mango tree and the kamani tree in a couple of his songs and i'm just curious. and i might possibly get a tattoo if it is...
thanks

2007-11-16 04:36:18 · 1 answers · asked by no, i'm not colorblind 1 in Botany

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callllcccc word problem help!!!! i dont get it?

Find the rectangle of largest area that can be inscribed in a semicircle of diameter 147, assuming that one side of the rectangle lies on the diameter of the semicircle.

The largest possible area is ______?

2007-11-16 04:30:00 · 3 answers · asked by Hinal P 1 in Mathematics

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When Will The World End And How?

2007-11-16 04:28:30 · 10 answers · asked by Anonymous in Astronomy & Space

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What is 1+1?

Don't worry if you don't know this - I know it is a very hard equation to solve

2007-11-16 04:20:29 · 26 answers · asked by Baked Beans 3 in Mathematics

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Why is the sky blue?

2007-11-16 04:15:27 · 19 answers · asked by Anonymous in Earth Sciences & Geology

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solve by factoring : -2y(y+4)=0?

2007-11-16 04:14:11 · 11 answers · asked by michael s 1 in Mathematics

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Does anyone know when formal disclosure will take place about the extraterrestrial presence?

I have been seeing overwelming evidence that we aren't along. Wow, what a concept. I was just wondering if anyone knew when this Disclosure event would be taking place so that we can start researching them and their free energy technology.

2007-11-16 04:13:06 · 10 answers · asked by Anonymous in Astronomy & Space

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x^2+7x-8=0?

if the solutions are not exact , estimate the answers by indicating thee consecutive integers between which the roots are located

2007-11-16 04:12:29 · 11 answers · asked by michael s 1 in Mathematics

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fire alarm?

i need it for my skul project so plz............................

2007-11-16 04:11:54 · 7 answers · asked by Aki 1 in Engineering

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What is the "sun's extended influence of particles?"?

In an article on Comet Holmes I read "the sun remains by far the most massive object in the solar system, with an extended influence of particles that reaches all the planets." Could someone explain this "extended influence of particles?"

2007-11-16 04:10:47 · 2 answers · asked by yerfavoritefiddler 4 in Astronomy & Space

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Math help!?

problem 1) [25 ÷ (2³ - 3)] • 2

problem 2) [(2 + 3)² -4 • 5] + 7

problem 3) | 4 | + | - 3 |

2007-11-16 04:10:36 · 3 answers · asked by Anonymous in Mathematics

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math help! systems of linear equations?

i have to solve this by using substitution please show work and explain each step and why u did it (add subtract multiply etc.)
4x-y=-4
-2x+5y=29

im getting so confused on this and a good example and explanation of step by step process would be greatly appreciated

2007-11-16 04:10:35 · 6 answers · asked by ihurtmyhand 4 in Mathematics

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solve by factoring : 4p(p-1)=0?

2007-11-16 04:08:42 · 11 answers · asked by michael s 1 in Mathematics

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Fit an equation to a max and a min?

Fit a function in the form ax^3 + bx^2 + cx + d to a local minimum and maximum at (4,7) and (6,-2)

I know this involves a system of equations and substitution but I have no idea how to do it. Thanks!

2007-11-16 04:08:17 · 2 answers · asked by Anonymous in Mathematics

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width of central maximum?

Light of wavelength 598 nm illuminates a single 0.77 mm wide slit. At what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 2.03 mm from the central maximum?

2.614 m, i got this right

What is the width of the central maximum?

no idea i cant seem to get this answer any suggestions...?

2007-11-16 04:06:44 · 2 answers · asked by meeh 1 in Physics