Science & Mathematics - 19 November 2006

2006-11-19 13:28:57 · 8 answers · asked by Anonymous in Mathematics

A substance is either an elelment or a(n)_______

2006-11-19 13:28:39 · 5 answers · asked by Cavs in '09 ♥ Hurry Back BEN 6 in Chemistry

help please

2006-11-19 13:22:19 · 4 answers · asked by Anonymous in Weather

off of japan's coast

2006-11-19 13:21:45 · 2 answers · asked by Anonymous in Geography

2006-11-19 13:19:50 · 7 answers · asked by Luis 4 in Chemistry

indicate whether the following elements exist as atomic species, molecular species, or extensive three dimensional structures in their most stable states at 25 degrees (C) and 1 atm and write the molecular or empirical formula for each one:
Phophorus
Iodine
Magnesium
Neon
Arsenic
Sulfur
Boron
Selenium
Gallium
Cesium
Oxxygen
*I dont understand the part of (atomic species, and molecular species??) I understand molecular and empirical formula.

2006-11-19 13:16:24 · 2 answers · asked by avalentin911 2 in Chemistry

??

2006-11-19 13:13:42 · 5 answers · asked by Anonymous in Astronomy & Space

2006-11-19 13:13:36 · 1 answers · asked by dee 1 in Engineering

An athlete executing a long jump leaves the ground at a 20° angle and travels 7.30 m. What was the takeoff speed? If this speed were increased by just 3.0 percent, how much longer would the jump be?

2006-11-19 13:11:27 · 3 answers · asked by Anonymous in Physics

2006-11-19 13:10:47 · 6 answers · asked by Brenda M 1 in Mathematics

2006-11-19 13:09:18 · 1 answers · asked by hwt_275 1 in Physics

Methanol, CH3OH, can be made by combining gaseous carbon monoxide and hydrogen gas.
In one experiment 1.40 g of H2 is mixed with 13.85 g of CO.


What is the theoretical yield of CH3OH ? I.E., how many grams of CH3OH should be formed?

Enter a numeric answer only, no units.

Thanks for explaining it to me :)

2006-11-19 13:06:43 · 2 answers · asked by lnklike 1 in Chemistry

why?

2006-11-19 13:02:47 · 2 answers · asked by nick a 1 in Engineering

2006-11-19 13:02:40 · 4 answers · asked by Anonymous in Botany

2006-11-19 13:01:02 · 10 answers · asked by Ariana 2 in Other - Science

A coffee cup (or constant pressure) calorimeter contains 108.0 g of water at an initial temperature of 25.0°C. 118.7 g of tin metal at a temperature of 100°C is added. The final temperature in the calorimeter is 29.2°C. What is the molar heat capacity of the tin? The molar heat capacity of water is 75.4 J/(mol•°C). Assume that the heat capacity of the coffee cup is negligible.

2006-11-19 12:57:18 · 2 answers · asked by Anonymous in Engineering

i am flying to india (17hour flight) and i HAVE to get over my fear of flying. Any suggestions?

2006-11-19 12:57:16 · 7 answers · asked by kristi_b00 1 in Biology

The scenario is a lighthouse at the North Pole, whose beam rotates at 1 revolution per second. Ignoring attenuation by the earth's atmosphere and the rotation of the earth, my original question was how far along the beam would it be travelling tangentially at the speed of light. The answer that were provided said that the "beam" is not solid and that in fact the photons in the beam are all travelling radially, with no tangential component. This I can accept. Now for my next installment:
Imagine that there is a mirror in the shape of an anulus (ring) at a distance "d" from the lighthouse:
1) What is the value of "d" (let's call it D) such that the intersection of the beam of light and the anulus moves at the speed of light (c)?
2) If the anulus was at a distance of 2D from the lighthouse, what will the speed of the intersection of the beam and the anulus be? Let's call it z.
3) What will I observe as I look towards the anulus from the lighthouse?(i.e. direction of reflected light

2006-11-19 12:56:59 · 3 answers · asked by Mez 6 in Physics

The molar heat of neutralization of a strong acid and a strong base is determined by mixing 50.0 mL of 1.0 M HCl with 50.0 mL of 1.1 M NaOH in a coffee cup calorimeter. The initial temperatures of two solutions was 25.32°C and the final temperature inside the calorimeter was 31.43°C. What is the molar heat of neutralization? Assume that the specific heat capacity of the solution is identical to water and the density is 1.00 g/mL.

2006-11-19 12:53:53 · 4 answers · asked by Anonymous in Chemistry

2006-11-19 12:50:39 · 7 answers · asked by Sang 1 in Physics

Plz give me a good example.

2006-11-19 12:48:19 · 2 answers · asked by moocow50000 1 in Mathematics

Hello! My daughter is doing a class project on the Downy Woodpecker and needs to put in the phonetic spelling of the scientific name so her classmates will be able to pronounce it. Could anyone who knows, please help? Also, pronunciations that are described phonetically would be more helpful than the dictionary-type pronunciation guide that directly follows the word. Thanks so much!! I'm not really sure which section to put this in, so I'm going to choose Science and Language and perhaps homework. Sorry if it seems over-posted, we are desperate and she only has another half hour!

2006-11-19 12:43:29 · 2 answers · asked by BetchaBiteAChip 2 in Zoology

Plz give me examples for both.Same denomenator and different.

2006-11-19 12:42:57 · 6 answers · asked by moocow50000 1 in Mathematics

2006-11-19 12:42:14 · 2 answers · asked by ask123 1 in Physics

i've been trying to construct a laser gun all my methods have failed any suggestions

2006-11-19 12:41:27 · 2 answers · asked by trmkitty 1 in Chemistry

is it...
3.01g,
11g,
72.6g, or
59.3

2006-11-19 12:41:11 · 1 answers · asked by Anonymous in Chemistry

Consider the reaction: NH3 + O2 → NO + H2O

A) How many grams of NO are produced from the complete reaction of 160.00 g of O2 ?

B) If the percent yield of this above reaction is found to be 92.98 %, how many grams of NO are actually produced ?

...thank you very much for your time :)

2006-11-19 12:41:00 · 2 answers · asked by lnklike 1 in Chemistry

2006-11-19 12:38:04 · 6 answers · asked by Notnadia 4 in Zoology

plz be specific and give me a good explenation. :)

2006-11-19 12:37:04 · 3 answers · asked by moocow50000 1 in Mathematics

2006-11-19 12:36:44 · 10 answers · asked by Anonymous in Engineering