Science & Mathematics - 23 September 2007

vii. Sulfur is burned in air

I'm not sure about this one, so if anyone can tell me, I would appreciate it loads!!!

2007-09-23 13:59:50 · 1 answers · asked by sophesticatedsophia 1 in Chemistry

2007-09-23 13:59:17 · 1 answers · asked by Anonymous in Chemistry

If a car moves with a constant speed, can you say that it also moves with a constant velocity? Please give an example of something because i don't understand this!!?!?

2007-09-23 13:57:25 · 3 answers · asked by Anonymous in Physics

tell me what p equals and how u got that answer

2007-09-23 13:56:07 · 4 answers · asked by onehalfpoint 1 in Mathematics

a ball is thrown from the top of a building at an angloe of 58 to the horizontal and with an initial speed of 12.1m/s. The point of realease is 8.5m aobve the ground. find the horizontal range of the ball from the base of the building.

i have 17.41 as the answer but it's wrong....please give me a correct one.

2007-09-23 13:55:34 · 3 answers · asked by ljkim08 1 in Physics

kill them; what do you suggest?

2007-09-23 13:55:04 · 4 answers · asked by Chickenfarmer 7 in Agriculture

I can't figure it out.

2007-09-23 13:54:45 · 5 answers · asked by beanpole136 2 in Chemistry

2007-09-23 13:54:43 · 6 answers · asked by Marvie S 1 in Biology

Lead metal is produced by heating solid lead(II) sulfide with solid lead(II) sulfate, resulting in liquid lead and sulfur dioxide gas. Write a balanced equation for the reaction using complete formulas for the compounds with phase labels. (Type your answer using the format 2H2SO4(l) for 2 H2SO4(l). Use the lowest possible coefficients.)

2007-09-23 13:52:54 · 2 answers · asked by brettmhannan 1 in Chemistry

Please try and be specific, the most helpful answer gets the points..thanks u

2007-09-23 13:52:14 · 6 answers · asked by Jonathan S 2 in Earth Sciences & Geology

Please try and be specific and remember define and COMPARE!!! most helpful person gets the points thank you

2007-09-23 13:51:08 · 2 answers · asked by Jonathan S 2 in Earth Sciences & Geology

This National Park is located in Ohio

2007-09-23 13:49:29 · 2 answers · asked by Mikey 1 in Earth Sciences & Geology

What might conditions on Earth be like without the greenhouse effect?

2007-09-23 13:47:24 · 3 answers · asked by viktoria y 1 in Weather

2007-09-23 13:46:42 · 3 answers · asked by Rachel K 1 in Zoology

The inverse of a matrix A is given by:
| 3 4 |
| 5 6 |

How can I solve for A?

2007-09-23 13:44:40 · 2 answers · asked by hawkax11 1 in Mathematics

please explain why

2007-09-23 13:44:04 · 1 answers · asked by Anonymous in Chemistry

A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. The engine is cut off when the lander is 5.0 m above the surface and has a downward speed of 0.8 m/s. With the engine off, the lander is in free fall.

What is the speed of the lander just before it touches the surface? The acceleration due to gravity on the moon is 1.6 m/s^2

i have no idea how to even approach the problem.....please help

2007-09-23 13:42:08 · 3 answers · asked by sandymandy 1 in Physics

a few peoples avatar?

2007-09-23 13:39:26 · 5 answers · asked by Father Ted 5 in Other - Alternative

Make a model of the Endomembrane System, detailing the path of a protein as it is synthesized and transported to its cellular or extracellular location.

2007-09-23 13:37:38 · 2 answers · asked by lilbertorange 2 in Biology

Gosh, these get me every time.....

Drama Club sold 311 tickets for a play. Student tickets cost $.50 and nonstudent tickets cost $1.50. If total receipts were $385.50, find how many tickets of each type were sold.


If you could show the steps, that would be very much appreciated!! Thanks!

2007-09-23 13:37:22 · 11 answers · asked by MAC Addict 2 in Mathematics

40xˆ8yˆ8 - 16xˆ3yˆ6 - 20xˆ6yˆ4

2007-09-23 13:34:11 · 3 answers · asked by jenny4518 1 in Mathematics

what are the regions of the USA?

2007-09-23 13:31:26 · 2 answers · asked by Anonymous in Geography

What is the instantaneous velocity of a freely falling object 10 s after it is released from a position of rest?
What is its average velocity during this interval?
How far will it fall during this time?

please provide an explanation to answers

2007-09-23 13:30:53 · 1 answers · asked by Igor S 1 in Physics

another question: some traits show no phenotypic plasticity, even though it seems that it would always be advatageous to be able to respond to enviornmental cues. why do u think some traits are not plastic?

(please guys...need help....even though i have some idea....i am not sure the explanation is quite right....so if u guys could help me out..would be great in better understandin my bio lab .....thanxx a lottt..every1)

2007-09-23 13:29:18 · 4 answers · asked by awaited.death 1 in Biology

how would the melting point of a substance be obtained if it sublimes before it melts?

2007-09-23 13:27:36 · 6 answers · asked by Anonymous in Chemistry

Feldspars and quartz make up more than 50 percent of the earth’s crust.

2007-09-23 13:25:52 · 6 answers · asked by bammmmmmmmmmmmmm 1 in Earth Sciences & Geology

neglecting air resistance.

2007-09-23 13:25:49 · 3 answers · asked by thugpreetforlife123 2 in Physics

a) mixture, solution
b) solution, homogeneous
c) pure substance, homogeneous
d) mixture, heterogeneous
e) mechanical mixture, properties
f) particle, pure substance

2007-09-23 13:25:35 · 1 answers · asked by tlbff 1 in Chemistry

If I get help for one of these, I'll understand the rest. I just get a little confused. Okay, here is the question:

How many molecules are in 3.4 moles of water?

I know how to set it up, I'm just not sure how to calculate it. Please, help! My grade depends on you!

2007-09-23 13:25:32 · 7 answers · asked by omgwtf 2 in Chemistry

why is it not a good idea to store iodine in the plastic bag?

thanks.

2007-09-23 13:25:20 · 1 answers · asked by Anonymous in Biology