Science & Mathematics - 16 December 2006

Assume that the pillars are at the 4 corners of a square or a parallelogram etc.

2006-12-16 13:41:07 · 3 answers · asked by stvenryn 4 in Engineering

2006-12-16 13:40:47 · 3 answers · asked by rmfurther3000 1 in Mathematics

2006-12-16 13:38:12 · 2 answers · asked by blade_6162 2 in Engineering

I need to know for a science test that i have on tuesday! Please help!

2006-12-16 13:35:30 · 3 answers · asked by MacKenzie K 1 in Chemistry

Its not 220 nor 118. But I dunno the answer.

2006-12-16 13:33:59 · 6 answers · asked by Anonymous in Mathematics

A projectile of mass 7.4 kg kg is shot horizon-
tally with an initial speed of 19.5 m/s from a
height of 20.6 m above a flat desert surface.
The acceleration of gravity is 9.81 m/s2 .

a) For the instant before the projectile hits
the surface, find the work done on the projec-
tile by gravity. Answer in units of J.

Find the change in kinetic energy since the
projectile was fired. Answer in units of J.

Find the final kinetic energy of the projec-
tile. Answer in units of J.

2006-12-16 13:31:06 · 3 answers · asked by TheThing 2 in Physics

I read that time slows down to a stop at the event horizon, because of time diolation, so to us watching from a distance it would appear to take for ever to fall in.

2006-12-16 13:29:45 · 8 answers · asked by Anonymous in Physics

Gasoline, also called petrol, is a petroleum-derived liquid mixture consisting mostly of hydrocarbons and enhanced with benzene or iso-octane to increase octane ratings, used as fuel in internal combustion engines.

2006-12-16 13:29:15 · 6 answers · asked by leen311 2 in Chemistry

I was wondering when they show where a spacecraft is right above a flat map of the earth, how come there are usually 3 or so paths that seem to mirror the actual orbital path? It's very frequently shown on the big main screen at places like Mission Control and stuff. What do those other lines represent?
http://liftoff.msfc.nasa.gov/icons/tracking.jpg

Thanks

2006-12-16 13:27:25 · 3 answers · asked by Alvin 1 in Astronomy & Space

If not then why would the bones in my fingers grow from 5 years of manual labour? Or is it just the muscle in my fingers that have grown?

2006-12-16 13:27:16 · 4 answers · asked by Anonymous in Biology

2006-12-16 13:24:49 · 12 answers · asked by guess w 1 in Biology

Find the ratio to three significant digits of the mass of the proton to the mass of the electron.

2006-12-16 13:24:06 · 2 answers · asked by sillentfeline 1 in Mathematics

I remember my Bio teacher saying something about us needing lungs because we wouldn't be able to get enough o2 from diffusion through our skin alone...and also *random* in that Bond film where the woman found dead was painted gold, they said they couldn't paint her whole body gold because she'd (suffocate)? Don't know if that's at all related lol but...just answer the main question plz lol.

2006-12-16 13:22:32 · 5 answers · asked by Anonymous in Biology

Solve each equation. Identify each equation as a conditional equation, an inconsistent equation, or an identity.

½ b - ½ = 1/4b

2006-12-16 13:18:23 · 4 answers · asked by salarian2001 2 in Mathematics

2006-12-16 13:18:12 · 19 answers · asked by pinkblacksunflower 1 in Astronomy & Space

I am planning on going to the medical field. I am currently taking Ap calculus AB at high school as a senior. Since I am going to take physics and chemistry, I know I will have to take calculus. But to what level? level 2 or 3?

2006-12-16 13:16:59 · 7 answers · asked by avalentin911 2 in Mathematics

im sure i read a new age site that used a calender of the aztecs or simaler tribe and predicted an astroid, maybe im up the wrong tree, enlighten me.

2006-12-16 13:13:06 · 2 answers · asked by whitenight639 3 in Astronomy & Space

2006-12-16 13:12:12 · 9 answers · asked by ? 1 in Earth Sciences & Geology

How do non-competitive inhibitors change the shape of an enzyme once they've binded with its binding site?

2006-12-16 13:10:15 · 7 answers · asked by Anonymous in Biology

Balanced equation:
2NaN3 -> 2Na + 3N2

What volume of nitrogen gas will be produced if 117g of sodium azide are stored in the steering wheel at 293.2k and 101.2 kPa?

2006-12-16 13:08:29 · 2 answers · asked by untilyoucamealong04 3 in Chemistry

also what happens when HCl is added to Ca
HCl added to Mg
H2SO4 added to Zn
H2SO4 added to Ca
H2s04 added to Mg

2006-12-16 13:00:20 · 3 answers · asked by g_unit4231 1 in Chemistry

i want to hear all the freaky things that have happened to people

2006-12-16 12:58:42 · 23 answers · asked by Irma 1 in Paranormal Phenomena

Or is this caused by a culmination of physical labour work?

2006-12-16 12:54:33 · 6 answers · asked by Anonymous in Biology

Calculate the pH of a 0.02M solution of Sr(OH)2 (2 is a subscript). Thanks!

2006-12-16 12:51:05 · 2 answers · asked by Anonymous in Chemistry

i know u dont like to answer these questions but i m stuck on my math project. i know area is width times length but on pentagon, how does it work? and volume is height times length times width but how is it on pentagon?

2006-12-16 12:50:47 · 10 answers · asked by eugina l 1 in Mathematics

2006-12-16 12:50:24 · 16 answers · asked by Sherise W 1 in Mathematics

.97=1 + (X/2,500,000)

2006-12-16 12:48:30 · 7 answers · asked by Lost in Space 1 in Mathematics

2006-12-16 12:42:58 · 12 answers · asked by <333 2 in Mathematics

Why did so many dinosaurs, fishes, and mammals grow so much larger than their modern counterparts?

2006-12-16 12:42:35 · 6 answers · asked by Anonymous in Zoology

1.Does the realtive mass have any unit? Why or why not?
Please explain and give examples.

2. please consider this,

when it comes to atoms, the reference particle is the isotope of carbon, C-12, which is assigned exactly 12 mass units. The relative masses of atoms, known as atomis masses (or atomic weights, have been determined. For some elements, these are:

ELEMENT ATOMIC MASS (relative mass)
hydrogen 1.01
carbon 12.01
oxygen 16.00
iron 55.85
gold 196.97
So, what do these numbers mean?

2006-12-16 12:42:28 · 1 answers · asked by mysterio 1 in Chemistry