Science & Mathematics - 29 July 2007

1. If the velocity of a particle is zero, can its acceleration be non-zero?

2. Can an object having constant acceleration ever stop and stay stopped?

2007-07-29 11:42:17 · 8 answers · asked by Heller 2 in Physics

Find the volume of a square prism whose base edges are 14 inches and has a height of 8 inches.

2007-07-29 11:39:14 · 4 answers · asked by Tom R 1 in Mathematics

2007-07-29 11:36:04 · 10 answers · asked by Anonymous in Paranormal Phenomena

2007-07-29 11:31:09 · 8 answers · asked by MeowMix 2 in Paranormal Phenomena

Was there another universe in exsistance? Will there one day be another BIG BANG-like event. Will the universe stay infinite forever?

2007-07-29 11:28:26 · 12 answers · asked by Anonymous in Astronomy & Space

slove the system by graphing. What are ny graphing points?

2007-07-29 11:25:49 · 6 answers · asked by LASHANDA F 1 in Mathematics

I know it can be odd colors based on upset tummy or eating too much of one thing or another.

But under normal circumstances why is it a rainbow of brown shades? (I really wanna know)

2007-07-29 11:24:55 · 8 answers · asked by ? 4 in Other - Alternative

How does this contribute to our current acceptance of plate tectonic theory

2007-07-29 11:21:06 · 2 answers · asked by Anonymous in Physics

the average speed of one airplain is 200 mph faster than that of an automobile.If the autombile starts at 3am and the airplane starts form the same place at 11am,they will have traveled the same number of miles by 1pm .

if r represents the rate of the automobile,how many miles does
the plane travel?

a.200r
b.2(200+r)
c.10r

2007-07-29 11:17:03 · 2 answers · asked by hola_kity2008 1 in Mathematics

2007-07-29 11:12:41 · 6 answers · asked by nancy_strittman 1 in Engineering

ok so i got diagnosed with dysmenorrhea today and they said not to eat anything with cheese, chocolate, or caffeine in it. i understand about the chocolate and caffein becuase they dialate the arteries. But why can't i eat cheese products? and is it just cheese or all dairy??

2007-07-29 11:11:53 · 6 answers · asked by kissesfromhvn807 2 in Medicine

How do u calculate the speed of light travling in a diamond, if no information was given (like numbers).

thanks for the help, i appreciate

2007-07-29 11:07:11 · 6 answers · asked by natiassefa 2 in Physics

I thought the answer was -3(negative 3); but I understand it's -2Y2(square). Can anyone explain why.

2007-07-29 11:04:35 · 5 answers · asked by ADM 3 in Mathematics

2007-07-29 11:03:26 · 7 answers · asked by Dave 4 in Mathematics

[6.05] A trapezoid has an area of 493 meters squared, a height of 17m, and a base of 22m. Find the length of the other base. Show all work for credit.

Thanks for any and all help guys, I really need some help with this question, I don't understand. Thanks.. and sorry...

2007-07-29 11:00:14 · 1 answers · asked by Tom R 1 in Mathematics

1. Dick spent $7 in order to buy baseballs and tennis balls. If baseballs are 70 cents each and tennis balls are 60 cents each, what is the greatest possible number of tennis balls that Dick could've brought? I just guessed and checked for this and got 7 but would like to know a algebraic way.

2. If the average of 4 #'s is 8000 and the average of 3 of the 4 numbers is 7500, then what must the 4th number be?

Thanks. If you could show the steps that'll be great.

2007-07-29 10:59:01 · 1 answers · asked by Anonymous in Mathematics

2007-07-29 10:57:23 · 4 answers · asked by Anonymous in Biology

An experiment was performed in which an empty 100 mL graduated cylinder was weighed. It was weighed once again after it had been filled to the 10.0 mL mark with dry sand. A 10mL pipet was used to transfer 10.0 mL of methanol to the cylinder. Use the data (below) to find the density of dry sand, the density of methanol, and the density of sand particles.

Mass of cylinder plus wet sand 45.2613 g
Mass of cylinder plus dry sand 37.3488 g
Mass of empty cylinder 22.8317 g
Volume of dry sand 10.0 mL
Volume of sand + methanol 17.6 mL
Volume of methanol 10.00 mL

I was able to get the first two densities, but how do you find the density of sand particles?

2007-07-29 10:51:42 · 3 answers · asked by Anonymous in Chemistry

A rock is suspended from a string; and it moves downward at constant speed. Which one of the following statements is true concerning the tension in the string if air resistance is not ignored?


1)The tension is greater than the weight of the rock.


2) The tension points downward.


3) The tension is less than the weight of the rock.


4) The tension is zero newtons.


5) The tension is equal to the weight of the rock.

2007-07-29 10:42:49 · 4 answers · asked by Anonymous in Physics

A 12.5843g sample of ZrBr4 was dissolved and, after several steps, all of the combined bromine was precipitated as AgBr. The silver content of AgBr was found to be 13.2160g. Assume the atomic masses of silver and bromine to be 107.868 and 79.904. What value was obtained for the atomic mass of Zr from this experiment?
(I have the correct answer but I need to know the procedure for solving the problem)

2007-07-29 10:41:56 · 3 answers · asked by Tastytaint 1 in Chemistry

Plus stupid question will be asked and that same person gets another 10 points..

This is all for me going out to the movies tonight.. So thanks a lot guys!

The height of a square pyramid is 24 cm. Find the slant height if the base edges are 14 cm.

The lateral area of a square pyramid is 62 square inches and the base area is 18 square inches. Find the surface area.

Find the base edge of a square prism with a height of 5m and a lateral area of 100 meters squared.

Find the lateral area of a triangular prism with base edges of 5cm, 12cm, and 13 cm. The height of the prism is 14cm.

Name the figure below.
http://learn.flvs.net/webdav/assessment_images/educator_geometry/Pictures/v6/mod6/06_17_58.gif

What is the area of a regular hexagon with side length of 40cm?

Find the height of a triangle with area of 42 square centimeters and a base of 7cm.

Find the area of a kite with diagonals of 28ft and 13ft.

2007-07-29 10:27:31 · 3 answers · asked by Triock91 1 in Mathematics

"The problem says to sketch the curve represented by te parametric equations and write the corresponding rectangular equation by eliminating the parameter." This is the problem:

x=3t-1, y=2t+1

This is how the problem is solved in the solutions manaual.:

Step 1: y=2((x+1)/3)+1
Step 2: 2x-3y+5=0

No how does step one develop into step 2??? In lost on this!

2007-07-29 10:25:05 · 4 answers · asked by Kayla G 1 in Mathematics

I just want to know because I think it would be cool to be able to control objects with your mind and stuff like that. BUT I WON'T TURN EVIL FOR IT!!!!
Any suggestions?

2007-07-29 10:25:00 · 18 answers · asked by Anonymous in Paranormal Phenomena

I am reviewing a survey on a property ion New Jersey and the Surveyor has noted "IP found" at some of the corners of the property. What does this mean? Also, some of the property contains wetlands, not active water, but secondary "marshes". There are 50 foot "transition areas" Does anyone know whether or not it is permissable to plant trees, flowers or other vegetation in theses transition areas and whether or not the property owner is permitted to mow the lawn in these transition areas?

2007-07-29 10:22:05 · 2 answers · asked by james r 1 in Earth Sciences & Geology

is it 'cos theres nothing left after the first one??

2007-07-29 10:19:17 · 7 answers · asked by Druid Getafix 2 in Weather

Where should i go after highschool for becoming a cardiologist? (heart doctor)

2007-07-29 10:15:10 · 5 answers · asked by Timmy K 2 in Medicine

When England has to put the clocks back and forward. Other countries don't so what happens to the time zone? Please Help xx

2007-07-29 10:09:58 · 4 answers · asked by Anonymous in Geography

and don't tell me about carbonation, because that's not what I'm going for.
I watch the bubbles rise forever and it looks like they're coming from the bottom of the glass, but theres nothing down there. it's just a constant stream of bubbles appearing out of nowhere. I'm sure it has to be some kind of chemical reaction, but why does it only happen in a few places at the bottom? why not all over?
It's the most mind boggling mystery to me.

2007-07-29 09:55:54 · 10 answers · asked by hobo 6 in Chemistry

what slows it down?

2007-07-29 09:53:23 · 7 answers · asked by hobo 6 in Physics

There is a spinner with the numbers 0 to 8 on it. There is another spinner with the numbers 0 to 6 on it. Both spinners are spun. What is the probability that the sum of the spins will be greater than 10?
The situation is continuous, not discrete. Please explain how you did it. Thanks.

2007-07-29 09:46:36 · 2 answers · asked by thyplo101 2 in Mathematics