Science & Mathematics - 20 October 2006

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2006-10-20 18:19:41 · 5 answers · asked by Annie 1 in Physics

A 100-kg block is pushed up a 30 degree incilne that is 10m long. If the coefficient of friction betweeen the block and the incline is 0.1, what is the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 seconds?

Okay; i am attempting to find Fn by using mgcos(theta)=(100)(9.81)cos(30)= 849.6N. Then i do f=(coeff. friction)(Fn)=(.1)(849.6)=84.95N.
Where am i going wrong here? I don't think i fully understand this problem at all. Please help me.

2006-10-20 18:17:50 · 6 answers · asked by pilotmanitalia 5 in Physics

x squared y squared - 2x=3

2006-10-20 18:13:50 · 7 answers · asked by unique_fantasy 1 in Mathematics

2006-10-20 18:09:50 · 8 answers · asked by John G 5 in Other - Science

I went fishing the other day got bored and started musing.In certain cycles the moon causes the sea to rise due to the pull of it's gravity. I suppose that all things on earth would be pulled by this same force therefore weighing less during this same cycle.. Here's my plan---buy several tons of gold at high tide and sell at low tide when it would be heavier. Any of you potential investors see fault with this? I think I might start going to the meat market at high tide also.

2006-10-20 18:04:17 · 7 answers · asked by luther 4 in Physics

2006-10-20 18:01:11 · 15 answers · asked by justsomedumbgirl 3 in Geography

This is the test:

Number of planets in the universe
Plus number of months in a year
Multiplied by number of days in a week is...........

2006-10-20 17:53:34 · 10 answers · asked by ? 3 in Mathematics

Hey! i want a real physics answer .I'm a high school student in standard 11

2006-10-20 17:49:39 · 7 answers · asked by Annie 1 in Physics

Earth is the only planet having life in it.but,it was discovered that mars also has vapour,where it is possible for us to live.Do u think we will have two planets consisting life in future?

2006-10-20 17:36:54 · 17 answers · asked by anu 1 in Astronomy & Space

2006-10-20 17:36:46 · 9 answers · asked by rumeshchander 1 in Biology

The best solar panels currently available are about 13% efficient in converting sunlight to electricity. A typical home will use about 40. kWh of electricity a day. Assuming 8 hours of useful sunlight per day, calculate the minimum solar panel surface area necessary to provide all of a typical home's electricity.
Energy rate of sun = 1.0 kilowatt per square meter of surface area.

Thanks

2006-10-20 17:36:06 · 3 answers · asked by Interpol 2 in Chemistry

2006-10-20 17:35:29 · 8 answers · asked by The Apostle 2 in Engineering

2006-10-20 17:34:04 · 2 answers · asked by Anonymous in Mathematics

2006-10-20 17:23:44 · 4 answers · asked by dk 2 in Engineering

2006-10-20 17:19:31 · 3 answers · asked by Vancouver Island Marmot 1 in Other - Science

2006-10-20 17:15:04 · 9 answers · asked by Anonymous in Other - Science

having a halloween party need soon

2006-10-20 17:12:06 · 2 answers · asked by Indigo H 1 in Chemistry

2006-10-20 17:11:36 · 22 answers · asked by Anonymous in Other - Science

2006-10-20 17:11:02 · 14 answers · asked by King 1 in Zoology

is it possible, that the magnetic fusion of the poles can be the spark that creates life , I was trying to work out binory numbers and the simplisty of the creation of life became transparent I so wished I cpould expalin, but I cant put it into words, if I could I'd be a song writer
just a simple spark not inlike that that creats an egg and a sperm to divide! it easy when you see the picture in my mind I just can explain it
cell division is so easy n not complex please tell me I'm not mad!

2006-10-20 17:07:33 · 4 answers · asked by Loverboi007 3 in Other - Science

i am really excited to do this slime experiment.
Or where do they sell it? i need it so eagerly.

2006-10-20 17:02:16 · 4 answers · asked by Anonymous in Chemistry

driven into the ground to the:
a. case of the pannel
b. main breaker switch
c. live bars
d. electric meter

2006-10-20 16:55:51 · 3 answers · asked by David G 1 in Other - Science

2006-10-20 16:51:58 · 10 answers · asked by Edmond S 1 in Mathematics

for project

2006-10-20 16:50:33 · 12 answers · asked by siddharth s 2 in Medicine

and can it be extracted from a deceased person?

2006-10-20 16:45:56 · 5 answers · asked by Mike U 1 in Biology

2006-10-20 16:45:35 · 6 answers · asked by megan6288 1 in Chemistry

2006-10-20 16:43:48 · 12 answers · asked by Anonymous in Other - Science

2006-10-20 16:39:59 · 2 answers · asked by jimppanzee 2 in Chemistry

2006-10-20 16:30:19 · 11 answers · asked by Anonymous in Other - Science

thank you.

2006-10-20 16:26:09 · 7 answers · asked by Anonymous in Chemistry