Science & Mathematics - 14 October 2006

A block of mass 8.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal. The coefficient of static friction between the block and the wall is 0.267. What are the possible values for the magnitude of P that allow the block to remain stationary.

2006-10-14 13:44:25 · 3 answers · asked by Jayu P 1 in Physics

-why does a food web give a more realistic picture of the interactions in ecosystems?

-does a food web give a complete picture of the interactions in an ecosystem? why or why not?

2006-10-14 13:42:44 · 5 answers · asked by kogmu 3 in Other - Science

you can see what i mean here: http://en.wikipedia.org/wiki/Isotopes_of_aluminium
what does that mean?

2006-10-14 13:41:01 · 2 answers · asked by um yea hi 4 in Chemistry

2006-10-14 13:39:43 · 5 answers · asked by gen 2 in Physics

Under which color filter will the leaf produce more starch; red, blue, green or white????


HOw can I know this? Is it the wavelenghts?


Can Someone explain to me why would the leaves under the [blank] colors will produce more starch??

2006-10-14 13:39:25 · 4 answers · asked by Anonymous in Biology

2006-10-14 13:37:11 · 5 answers · asked by gen 2 in Physics

rotation objects experience an apparment force away from the center of rotation. for a rotating sphere,this force is greatest at the equator.

2006-10-14 13:36:28 · 2 answers · asked by Reginald B 1 in Earth Sciences & Geology

They don't seem to move too fast, but for some reason I can't seem to kill them, pesky suckers! Thanks for any advice. Sorry, wasn't sure what category to put it under...lol

2006-10-14 13:35:37 · 5 answers · asked by merlin_steele 6 in Zoology

2006-10-14 13:34:11 · 10 answers · asked by jordanafortaleza 1 in Astronomy & Space

does the little number (kind of like an exponent) go before or after the symbol?????
i think i have seen it both ways, does it matter?

2006-10-14 13:28:33 · 2 answers · asked by um yea hi 4 in Chemistry

is it hemopoiesis, mineral homeostasis, support, or production of vitamin D

2006-10-14 13:25:04 · 9 answers · asked by smooth1 1 in Biology

I have the answer but I just need to know the process:
You have a square parallel-plate capacitor of length 2L and seperation L/2. You have a dielectric slab of length L, width L, and thickness L/4. You can change the shape of the dielectric slab. However, the length must remain equal to the width, and the total volume must remain constant; you may only change the thickness. Show that if the thickness is h, then the capacitance is given by: C=[epsilon knot]L^2{4h^2/[L(k-1)+h] + L/2 - h }^-1. k is the dielectric constant kappa.

2006-10-14 13:23:00 · 2 answers · asked by thomthum2000 2 in Physics

Rutherford expected the alpha particles to go right through the gold foil...I thought that the model of the atom at the time was a solid sphere so wouldn't he have expected them to bounce off? Did he shoot beta particles before alpha particles and they went through? I know his conclusion was that atoms are mostly empty space with a dense central positive core.

2006-10-14 13:22:07 · 1 answers · asked by The Cheminator 5 in Chemistry

2006-10-14 13:21:20 · 2 answers · asked by Brain P 1 in Chemistry

2006-10-14 13:19:30 · 8 answers · asked by tinker4ok 1 in Engineering

how do i solve lim h->0 (e^h-1)/3h , the answer is 1/3 but how do i get it? also, it is e as in 2.718...thanks.

2006-10-14 13:16:57 · 10 answers · asked by Anonymous in Mathematics

how fast it weakens? at what temperature does it take to start affecting the steel frame strength?and at what rate of speed does it take?

2006-10-14 13:16:25 · 7 answers · asked by maw.jml.06@verizon.net 1 in Other - Science

The documentary about the history of black astronauts in the NASA program was shown on public television in 1990 and the book was written later to include information on Mae Jamison and others. I am looking for where to find the documentary, Black Stars in Orbit: NASA’s African-American Astronauts for purchase.

2006-10-14 13:11:32 · 1 answers · asked by martindrama1 1 in Astronomy & Space

??? i am so lost. i need them for aluminum. how do i find them??

2006-10-14 13:11:16 · 4 answers · asked by um yea hi 4 in Chemistry

want 2 know what it means

2006-10-14 13:09:56 · 9 answers · asked by janelle 1 in Other - Science

-in what ways could a tree be connected to a mushroom?

-in what ways could a fox be connected to a fern?

-in what ways could we (humans) be connected to a tree, mushroom, fox and fern?

2006-10-14 13:03:29 · 6 answers · asked by kogmu 3 in Other - Science

I live in ontario canada out in the boonies, and in winter, its gets to -45 degrees celcious. i'm just wondering, whats the coldest its been at your house?

2006-10-14 13:02:48 · 15 answers · asked by piano_man_969 2 in Weather

I know the length of the bowling alley to be 60 ft. But, if I use the velocity, time, and formulas given to me to find distance, the answer is not 60 ft. Why?

2006-10-14 13:01:55 · 7 answers · asked by Mnemosyne_21 1 in Physics

If a cricket is not being held in someone's hand, it is more likely for them to actually bite you, or for you to get hurt by the barbs on its legs?

2006-10-14 13:01:41 · 10 answers · asked by punkrocksyourmom 1 in Zoology

As a roller coaster car crosses the top of a 50.0 -diameter loop-the-loop, its apparent weight is the same as its true weight. What is the car's speed at the top?

2006-10-14 12:51:43 · 2 answers · asked by Matt B 1 in Physics

Should It

2006-10-14 12:51:06 · 15 answers · asked by BW 1 in Chemistry

this is for a earth science class, i think it has something to do with the volacanoes and their formation

2006-10-14 12:47:08 · 4 answers · asked by francheska 3 in Earth Sciences & Geology

2006-10-14 12:39:46 · 13 answers · asked by mancyget 1 in Physics

1. 1/4y + 2/3y = 12

2006-10-14 12:39:31 · 9 answers · asked by Anonymous in Mathematics

2006-10-14 12:37:43 · 8 answers · asked by Beavis 1 in Biology