Science & Mathematics - 18 December 2006

1. predict the shape and bond angle for the compound carbon :tetrafloride, CF4
:phosphorus trifluoride, PF3
:Fluoride monoxide, F2O
2. predict type of hybridized orbitals involved in the compound boron trichloride, BCl3
3. what type of hybrid orbitals are involved in the bonding of the silicon atoms in silicon tetrafluoride, SiF4?

gracias

2006-12-18 16:06:36 · 2 answers · asked by Anonymous in Chemistry

what does conservation of momentum mean? please explain thoroughly because i am really bad at science T-T. THANK YOU!!!

2006-12-18 16:05:08 · 5 answers · asked by Orange? 4 in Physics

I just got back last month from a 2 month vacation in a mountain region of the Adriatic coast. There were long, pristine nature trails everywhere, that delved deeply in every diretion. I would walk several miles alone every day... but I noticed a plethora of intricate sub-trails intertwining through the trails, tons of them, but they were not high enough for a human to have made them. When I asked my friends what created them, they said wild boar. First, do you think this is true? Second, if I was walking deep into the mountains surrounded by wild boar, I am very lucky to have not encountered them--but if I had, what could they have done to me? I would appreciate any assistance.

2006-12-18 16:04:15 · 7 answers · asked by trey 1 in Zoology

2006-12-18 15:57:02 · 4 answers · asked by Kristina C 1 in Geography

2006-12-18 15:55:17 · 5 answers · asked by Anonymous in Zoology

Solve sin x = 0, when 0≤ x ≤ 360˚?

2006-12-18 15:55:13 · 5 answers · asked by Anonymous in Mathematics

2006-12-18 15:49:19 · 12 answers · asked by ryan m 1 in Earth Sciences & Geology

What material/What should I do to to the contact lense to produce protein build up on it (please don't answer "put it on the eye for a while.")

2006-12-18 15:48:57 · 3 answers · asked by Anonymous in Biology

2006-12-18 15:47:56 · 2 answers · asked by substance 2 in Chemistry

2006-12-18 15:47:39 · 2 answers · asked by Anonymous in Geography

I have to do a presentation about any topic in biochemisrty to my teacher and my classmates, I want to present sth interesting and new, please any one can help, do u have any ideas?
thank u very much

2006-12-18 15:46:50 · 1 answers · asked by Cinderella 3 in Chemistry

I have to do a presentation about any topic in biochemisrty to my teacher and my classmates, I want to present sth interesting and new, please any one can help, do u have any ideas?
thank u very much

2006-12-18 15:45:42 · 1 answers · asked by Cinderella 3 in Chemistry

Solve sin 2 x = 0.8193, when 0≤ x ≤ 360˚?

2006-12-18 15:43:25 · 9 answers · asked by Anonymous in Mathematics

4x – 2 = -8 + 5x

2006-12-18 15:41:00 · 8 answers · asked by salarian2001 2 in Mathematics

2006-12-18 15:37:54 · 12 answers · asked by Berry 2 in Mathematics

so far i have (x-3)(x-2)(x+1). However, i do not know how to fit in the second part of the question.

2006-12-18 15:37:00 · 6 answers · asked by C 1 in Mathematics

2006-12-18 15:35:59 · 4 answers · asked by i_need_answers 1 in Mathematics

I'm a mechanical engineering student from sri lanka. As my final year project we are designing an underwater exploration vessel.

2006-12-18 15:35:24 · 2 answers · asked by dileepa 1 in Engineering

2006-12-18 15:35:12 · 9 answers · asked by omicron 1 in Astronomy & Space

2006-12-18 15:33:52 · 10 answers · asked by Anonymous in Other - Science

2006-12-18 15:32:14 · 2 answers · asked by TEN PIN 1 in Zoology

sun core

2006-12-18 15:31:40 · 11 answers · asked by GURUBARAN V 1 in Weather

Jane is 2 mi offshore in a boat and wishes to reach a coastal village 6 mi down a straight shoreline fromt eh point nearest the boat. She can row 2 mph and can walk 5 mph. where shoudl she land her boat to reach the village in the least amount of time?

2006-12-18 15:31:38 · 1 answers · asked by lidoboi07 1 in Mathematics

How many different paths from C are there which spell out the word christmas?

C H R I S T M A S
H R I S T M A S
I S T M A S
S T M A S
T M A S
M A S
A S
S

2006-12-18 15:29:54 · 5 answers · asked by Anonymous in Mathematics

1. [(-8) x 11] (mod3)

2. (3-27)(mod5)

2006-12-18 15:26:08 · 3 answers · asked by jakesly 1 in Mathematics

2006-12-18 15:25:57 · 8 answers · asked by koko 1 in Botany

Please help me!!!!!i need 2 knoe this for my essay for science that is due on wednesday!!!!!!!!HELP!!!!!!!!!!!!PLEASE!!!!!!!!!!!!!
=)

2006-12-18 15:25:57 · 4 answers · asked by Anonymous in Geography

react to form water, carbon dioxide, and sodium acetate, which is released from the rocket as it shoots up into the air. The box for the rocket indicates that the toy rocket will fly to a maximum height of 60 m and the mass of the empty toy rocket is 0.450 kg.
a)Before the toy rocket is launched, where is the energy needed to power the rocket? What type of energy is this?
b)After the rocket is launched, what type of energy is associated the movement of the rocket upward? Where did this energy come from?
c)When the toy rocket reached its maximum height in the second before the rocket begins to fall back to Earth the Kinetic energy associated with the rocket is)J. According to the law of conservation of energy, the first law of thermodynamics, energy is neither created nor destroyed. In terms of kinetic energy and potential energy, explain how this law is obeyed as the toy rocket rises to its maximum height.
d) Assuming that the rocket reaches its maximum height of 60 m at that point all of the baking soda and vinegar has been released from the rocket as water, carbon dioxide and sodium acetate such that the rocket has a mass of 0.450 kg, what is the maximum gravitational potential energy in joules of the rocket? The gravitational constant on Earth is 9.8 m/s2.

2006-12-18 15:25:04 · 2 answers · asked by chemistrystudentinneed 1 in Chemistry

Solve 4 cos x – 3 = 0, when 0≤ x ≤ 360˚?

2006-12-18 15:24:10 · 4 answers · asked by Anonymous in Mathematics

Find the polynomial function with the given degree and zeros:
-1,2,3-2i
and
-2,-2+3i
i need help in how to do it the person who can explain it the best gets five stars as best answer!! XD

2006-12-18 15:23:57 · 3 answers · asked by Anonymous in Mathematics