Science & Mathematics - 18 November 2007

2007-11-18 12:55:11 · 1 answers · asked by Anonymous in Physics

I need to know this for 8th grade physics - also, what are ways to find out when you are given limited information?

2007-11-18 12:52:29 · 1 answers · asked by piano man 1 in Physics

Buckwheat's tractor tires have a diameter of 1.2m. Dingus counts the wheels turning 80 times (80 revolutions) as Bucky drives the length of the potato field. How long is the field in metres?

Then,
When it's Dingus' turn, he drives the length of the field in 36 seconds. How fast is he traveling in km/h?

This is what I did for both;
http://www.mymathforum.com/viewtopic.php?t=2157

2007-11-18 12:52:24 · 2 answers · asked by Dylan Rose 1 in Mathematics

Could anyone help me with this?
pi = 3.14 with this no more than 2 decimal places.
http://img229.imageshack.us/img229/2201/homework001hr9.jpg

thank you

2007-11-18 12:52:12 · 1 answers · asked by George 1 in Mathematics

we are approaching an amazing celestial event.

2007-11-18 12:48:27 · 27 answers · asked by gonad m 1 in Astronomy & Space

aln elctron is moving 5x10^6 m/s parallel to a 1mm diameter wire carrying a current of 20 A. If the elctron is 2 mm from the center of the wire, w/ its velocity in the same direction as the current. what is the force that the electron experiences?

i know that F= qVB

and B= (U I) / (2 pi r)

but i duno....plz help

2007-11-18 12:42:36 · 1 answers · asked by Anonymous in Physics

A tomato plant is 12 inches tall, and grows 1.5 inches per week. A second plant is 6 inches tall, and grows 2 inches per week. When will they be the same height ?
How would you set up an equation to show this. I know it is in the 12th week, they would both be 30 inches.

2007-11-18 12:37:51 · 1 answers · asked by labd1 1 in Botany

For those people who answer the first question I ask can you at least tell me which site that has a brief information about it like the characteristic ,biodiversities ,description and facts about it pls.I would really appreciate it if someone can tell me where it is .

2007-11-18 12:34:25 · 3 answers · asked by DARK SONIC 2 in Earth Sciences & Geology

and what are the possible components.

2007-11-18 12:28:01 · 5 answers · asked by double_drago 3 in Engineering

At 11:00 a.m. a one-meter-high mailbox casts a 0.2-meter shadow. If a pole beside the mailbox casts a 8-meter shadow, how tall is that pole? thank you.

2007-11-18 12:24:19 · 1 answers · asked by Jane A 3 in Mathematics

2007-11-18 12:24:03 · 6 answers · asked by Anonymous in Earth Sciences & Geology

If sue mows nine lawns in 3 hours, and Jack mows lawns in 3 hours (as in problem one above), and we wish to discover how long it will take Jack and Sue working together to mow 1 lawn, and we let t stand for that time, an equation which could be used to solve for t would be:

a. 9t+6t=1
b. 1/2t+3t=1
c. 2t+3t=1
d. 1/9t+1/6t=1

2007-11-18 12:23:54 · 7 answers · asked by ~Sweetcheeks~ 2 in Mathematics

2007-11-18 12:23:24 · 4 answers · asked by Nana P 1 in Geography

I was watching a program the other day, in which this ghosthunter was actually trying to talk to a ghost and get it to respond. I wondered how he expected the ghost to talk without vocal cords, even if it did exist, how could it do anything without a brain?
I've listened to all of th bizarre theories on how ghost draw energy, etc, but all of this would have to be done by an intelligent organism that had some kind of brain to process information. So what is the theory? If they do exist, how can ghost behave like they supposedly do, carry on hauntings, etc without the ability to think?

2007-11-18 12:23:21 · 17 answers · asked by madcat 5 in Paranormal Phenomena

a bottle of PbSO4 contains 158.1g of the compound. How many moles of PbSO4 are in the bottle?

could you show how please.

2007-11-18 12:23:08 · 3 answers · asked by Anonymous in Chemistry

A KMnO4(aq) solution is to be standardized against As2O3(s) . A 0.1078g sample of As2O3 requires 22.15 ml of the KMnO4 (aq) for its titration . what is the molarity of the KMnO4(aq)?

5 AS2O3 + 4 MnO4 + 9 H2O + 12H ----> 10 H3AsO4 + 4 Mn

2007-11-18 12:22:37 · 1 answers · asked by Anonymous in Chemistry

what are brushes or (spring loaded contacts) and How do they work?

http://en.wikipedia.org/wiki/Brush_(electric)

<-- it says what they do not enough on what they are physically.

Appreciated.

2007-11-18 12:19:51 · 1 answers · asked by double_drago 3 in Engineering

this is the only other one i cant get

The tickets for a dance recital cost $5.00 for adults and $2.00 for children. If the total number of tickets sold was 295 and the total amount collected was $1,220, how many adult tickets were sold?

Answer:??adult tickets

2007-11-18 12:19:50 · 1 answers · asked by Lee 1 in Mathematics

yeah 155 problems left but i suck at geometry lol soooo heres da problem

your team is instructed to plant the trees in a rectangular region you can use any rectangle as long as its area is 1600 ft squared.. if the side lengths in feet are natural numbers what are the possible dimensions of the region?


confusing lol grrrrrrr i hate math and my teacher, Mr. Butori, doesnt hold back on givin us lotsa problems.

2007-11-18 12:19:33 · 1 answers · asked by Aloha_lil_roxy_grlie_89 2 in Mathematics

x+(1.4y)=1.2

and if it helps x+y=1

2007-11-18 12:19:27 · 5 answers · asked by Anonymous in Mathematics

please, help, i've been at the hospital & my step father almost went to jail.!!! I had 3 wholes days to do 34 questions. . . i know i know. . . but here r 9 questions i couldn't find or didn't understand, and i would be very happy if you could help me
1: Processes that Igneous rocks can go thru
2:Proces of Metamorphic rock
3:Explain Cast & Molds
4:How r trace fossils differant from other fossils
5:What does fossil pollen tell us about the past?
6:Explain the Law of Uniformitarianism?
7:What environment would be best 4 fossilization?
8:list 4 ways once living things can be fossilized?
9:Why are original remains fossils differant from all other types of fossils?

2007-11-18 12:19:13 · 4 answers · asked by Papoose 2 in Earth Sciences & Geology

2007-11-18 12:17:50 · 3 answers · asked by qbanma19 1 in Mathematics

Predict whether the following reactions are spontaneous or not.
Pd^2+ + H2 → Pd + 2H^+ ..... Pd^2+ + 2e^- → Pd .....E°=0.987V
Ni^2+ +H2 → Ni + 2H^+....... Ni^2+ + 2e^- → Ni .......E°=-0.250
From your answer, decide which of the above metals could be reduced by hydrogen. Identify the oxidating agents and reducing agents in the reaction.

can someone please help me solve this question? and tell how you got it.
thank you.

2007-11-18 12:17:26 · 1 answers · asked by abc 1 in Chemistry

2007-11-18 12:16:16 · 63 answers · asked by Anonymous in Astronomy & Space

find the range of each function for the given domain:
for a car traveling at a constant rate of 60 mph the distance traveled is a function of the time traveled

a. express the relation as a function

b. find the range of the function when the domain is{1,5,10}

c. what do the domain and range represent?

2007-11-18 12:15:16 · 1 answers · asked by cocopuffs 2 in Mathematics

I read in a textbook that it's possible to burn a banana and get the yellow flame that indicates potassium is present.
I thought it might make a good classroom presentation, but my banana doesn't burn!

2007-11-18 12:15:05 · 2 answers · asked by P D 1 in Chemistry

what is a substance plz give site where you found it!

2007-11-18 12:14:52 · 1 answers · asked by Anonymous in Chemistry

Write in simpliest radical form (assume all variables are non-negative)

1] (5-2√3)^2

2] √5 (√10 -4√5)

2007-11-18 12:13:52 · 3 answers · asked by Anonymous in Mathematics

2007-11-18 12:13:09 · 2 answers · asked by Anonymous in Medicine

i am interested in attending college in east tennessee. however...i am from new england and i am seeking to go somewhere warmer for college. i know east tennessee is a mountainous region so i am wondering how much impact the elevation has. how do winters in east tennessee compare to winters in massachusetts? is it worth it to go to east tennessee in search of a warmer climate?

2007-11-18 12:12:12 · 7 answers · asked by Arthur M 1 in Geography