Science & Mathematics - 9 November 2006

2006-11-09 01:31:58 · 4 answers · asked by geniusflightnurse 4 in Chemistry

2006-11-09 01:28:36 · 18 answers · asked by lokom 1 in Geography

2006-11-09 01:26:09 · 9 answers · asked by sammmmmmm 1 in Geography

*It has to be very very very very current!!!

2006-11-09 01:25:40 · 3 answers · asked by Anonymous in Physics

apparently, when I use the Born-Haber cycle to calculate it it's negative, but in the textbooks all the lattice energies are listed as positive. Why?

2006-11-09 01:25:21 · 3 answers · asked by aerial_dreams08 2 in Chemistry

2006-11-09 01:25:03 · 5 answers · asked by geniusflightnurse 4 in Chemistry

2006-11-09 01:23:03 · 2 answers · asked by chemical engineer 1 in Engineering

2006-11-09 01:19:08 · 6 answers · asked by Anonymous in Geography

Azide ion - N3-?
How do i draw a dot and cross diagram of this - i know that each
-
Nitrogen atom is double covalently bonded by the ion is N3 (minus) so does this mean in one of the doulbe bonds there will be one less electron or what how do i draw it?

2006-11-09 01:15:08 · 3 answers · asked by Anonymous in Chemistry

2006-11-09 01:13:17 · 9 answers · asked by Chris S 1 in Mathematics

15: As the number of neutrons emitted during a fission reaction increases, the intensity of the fission process?

increases
decreases
remains the same
none of the above

When a radioactive element undergoes an alpha disintegration, both the atomic weight and the atomic number of the daughter nucleus?

increases
decreases
remains the same
none of the above


As bismuth 210 emits electrons, the mass of the daughter nuclei formed?

increases
decreases
remains the same
none of the above


When uranium 238 changes into plutonium in an atomic reactor, the number of neutrons in atomic nuclei ?

increases
decreases
remains the same
none of the above


During fission of uranium 235 in an atomic bomb, the number of neutrons ?

increases
decreases
remains the same
Answer 4


As fusion occurs in the sun, the number of atoms of helium in the sun?

increases
decreases
remains the same
none of the above

2006-11-09 01:12:44 · 1 answers · asked by K&E4life 1 in Chemistry

2006-11-09 01:12:30 · 8 answers · asked by fowzi 1 in Mathematics

In lab I looked up three melting points and my unknown substance had to come to a pretty close match to the known melting ranges. This didn't happen, why?

2006-11-09 01:12:06 · 2 answers · asked by geniusflightnurse 4 in Chemistry

explain the concept of vertical hand over?

2006-11-09 01:05:04 · 1 answers · asked by deepu 1 in Mathematics

2006-11-09 01:03:43 · 1 answers · asked by Anonymous in Geography

assuming that there's no air inside except methane gas....

2006-11-09 00:55:40 · 5 answers · asked by paloloy 1 in Chemistry

2006-11-09 00:53:42 · 5 answers · asked by z_loque2 1 in Engineering

2006-11-09 00:52:53 · 7 answers · asked by zack 1 in Zoology

You have separate solutions of HCl and H2SO4 with the same concentrations in terms of Molarity. You wish to neutralize a solution of NaOH. Which acid would require more volume (in mL) to neutralize the base?

a.) the HCl solution
b.) the H2SO4 solution
c.) You need to know the acid concentrations to answer this question
d.) You need to know the volume and concentration of the NaOH solution to answer this question
e.) c and d

2006-11-09 00:51:00 · 3 answers · asked by Anonymous in Chemistry

I love TIGERS, they are so beautiful. They just have such a wonderful nature about them...they are strong and fierce and yet they are also so gentle and loving.....and have such an enchanting presence that makes you feel that you gotta have a tiger of your very own =)....anyways, what is YOUR favourite animal?

2006-11-09 00:50:03 · 8 answers · asked by Anonymous in Zoology

A jet is flying at the speed of sound: A gun is fired from the rear of the plane: The bullet is traveling at the speed of sound: Will the bullet simply drop to earth?: If not, why not?

2006-11-09 00:41:32 · 6 answers · asked by gntolng 4 in Physics

2006-11-09 00:35:36 · 15 answers · asked by Sadaf M 1 in Biology

The flower called kuringi is found in a mountain in South India.It blossoms once in twelve years only.Definitely weather has to do something with this phenomeno.Can anybody throw some light on this?

2006-11-09 00:35:36 · 3 answers · asked by Arasan 7 in Weather

the q. says the speed camera gives out bright flashes to provide enough light for the photographs. how does the light from the flash get back to the camera to produce the photographs?

2006-11-09 00:35:03 · 4 answers · asked by keyguitargirl 2 in Physics

How do u proove the above? Steps will be appreciated. Thank you.

2006-11-09 00:31:37 · 3 answers · asked by siddharthm91 2 in Mathematics

2006-11-09 00:23:03 · 8 answers · asked by Sadaf M 1 in Biology

i wanna information or names for site about hybridization of halogens ????? HAVE ANICE DAY

2006-11-09 00:22:02 · 3 answers · asked by Anonymous in Chemistry

This is a really serious assignment for IB Biology, and i want some recommendations on a good two year lab on drosophila or any other invertebrates?

2006-11-09 00:16:10 · 4 answers · asked by ashamals 1 in Zoology

If everything is made of elements, what is wood consist of? or a leaf? which element?

2006-11-09 00:14:27 · 7 answers · asked by Neo 1 in Physics

automobile collision. Cars are designed with a “crumple zone” in the front of the car. In the event of an impact, the passenger compartment decelerates over a distance of about 1 m as the front of the car crumples. An occupant restrained by seat belts and air bags decelerates with the car. By contrast, an unrestrained occupant keeps moving forward with no loss of speed (Newton’s first law!) until hitting the dashboard or windshield. These are unyielding surfaces, and the unfortunate occupant then decelerates over a distance of only about 5 mm.

A) A 60 kg person is in a head-on collision. The car’s speed at impact is 15 m/s. Estimate the net force on the person if he or she is wearing a seat belt and if the air bag deploys.
B) Estimate the net force that ultimately stops the person if he or she is not restrained by a seat belt or air bag.
C) How do these two forces compare to the person’s weight?

Please show your work. Thanks.

2006-11-09 00:13:22 · 2 answers · asked by ANON 1 in Physics