Science & Mathematics - 14 November 2006

An ultralight plane had been flying for 40 min when a change of wind direction doubled its ground speed. The entire trip of 160 mi took 2 h. How far did the plane travel during the first 40 min?
.
28 mi

B.
32 mi

C.
36 mi

D.
40 mi

2006-11-14 02:49:43 · 7 answers · asked by Anonymous in Mathematics

PLEASE PLEASE HELP ME! I have to write a report on how music effects plants and I need help on where to look! The notecards are due FRIDAY!!!!!! :( BUT PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE help!

2006-11-14 02:49:17 · 2 answers · asked by mcrFFTLfob NERD! 1 in Botany

2006-11-14 02:48:44 · 4 answers · asked by DeMarkus B 1 in Botany

2006-11-14 02:48:00 · 6 answers · asked by aly 1 in Physics

Jenny had driven for 2 h at a constant speed when road repairs forced her to reduce her speed by 10 mp/h for the remaining 1 h of her 152 mile trip. Find her original speed.
a.471/3mi/h




B.
54 mi/h

C.
56 mi/h

D.
none of these

2006-11-14 02:46:45 · 9 answers · asked by Anonymous in Mathematics

kindly give the magnification strenghts of the following set of objectives for verification purposes

2006-11-14 02:45:20 · 1 answers · asked by rhyan192003 1 in Botany

That was a multiple choice question from a past physics paper. The question intrigued me:

Sounds are made by vibrating objects. A certain object vibrates but person nearby cannot hear any sound. Which statrement is correct?
A) The amplitude of the sound waves is too large.
B) The frequency of the vibration is too high.
C) The sound waves are transverse.

Only one of the above answers is correct. Can you tell me the answer but I also want an explanation why. The explanation is very important since the first 2 options appear correct to me. Plz help!

2006-11-14 02:43:24 · 3 answers · asked by Y L 2 in Physics

2006-11-14 02:42:08 · 4 answers · asked by Anonymous in Engineering

Mark is 10 years younger than Larry. Larry's age in 8 years will exceed twice Mark's age 3 years ago by 4 years. Hold old are each now.

I have:
L+10=M
L+8=2M-3
what do I do with the 4?

2006-11-14 02:41:22 · 6 answers · asked by TIM H 1 in Mathematics

speed of sound

2006-11-14 02:40:31 · 17 answers · asked by Eirlys Wyn T 1 in Physics

the point of this question is that i don't know how to figure out the discharge of the capacitor by knowing the farads on it the coulombs and the rated voltage please help

2006-11-14 02:35:47 · 5 answers · asked by macgyver 1 in Engineering

a teacher is 15 years older than her student. in 15 years, the ratio of their ages will be 3:2. find their present ages

2006-11-14 02:35:15 · 8 answers · asked by janyz 1 in Mathematics

i need some questions on superconductivity?it should not be very complicated.
What is Meissner effect?
Give some applications of superconductors?
What is Josephson Junction.

These are few questions i have i need more.

2006-11-14 02:33:37 · 1 answers · asked by nauroze_hoath 2 in Physics

1. 35% of 50 is what?
2. Emma got 82% on a 40 question test. About ho w many questions did she answer correctly?
3. Amir's favorite ice cream used to cost $1.50 until the price was raised to $1.75. what perfect increase was that?
4. Jenny paid $12000 for her car. Five years later she sold it for $8500. What percent decrease is this?
5. The Music Box marked up their cd's 75%. If the Music Box charges $20 for a special cd, how much did it cost before the markup? (the answer is not $15)
6. Quinn deposits $2000 in a savings account that pays 4% compounded semi-annualy. How much money will Quinn have in her account after two years?


i know they must be really easy... i just dont like percentages.

2006-11-14 02:33:28 · 5 answers · asked by Seira T 1 in Mathematics

If a lot of people follow the same procedure for making a calorimeter and determing its heat capacity, would the heat capacity of it be (within experimental error) the same for everybody?

2006-11-14 02:30:02 · 1 answers · asked by hibiscus2424 1 in Chemistry

After the 2004 South East Asian Tsunami

2006-11-14 02:29:59 · 5 answers · asked by rainbowbrite 2 in Earth Sciences & Geology

2006-11-14 02:27:05 · 3 answers · asked by Madame leota 1 in Earth Sciences & Geology

2006-11-14 02:26:13 · 2 answers · asked by Kinsey L 1 in Earth Sciences & Geology

guide me to buy a good telescope and what r the technical aspects

2006-11-14 02:25:41 · 7 answers · asked by Anonymous in Astronomy & Space

2006-11-14 02:24:57 · 5 answers · asked by pacificwaves8 2 in Mathematics

I've unplugged everything in my room and it's still there. Could it be electrical wiring inthe wall? If so, is there anything i can do about it. It's not very loud but it's driving me nuts me nuts.

2006-11-14 02:24:48 · 11 answers · asked by bavwill 3 in Physics

Does it have an end or does it just go on and on forever and ever? Do you think we are the only things that live in the whole of space????

2006-11-14 02:23:03 · 28 answers · asked by me_me 1 in Astronomy & Space

2006-11-14 02:21:48 · 22 answers · asked by MartinD 1 in Astronomy & Space

2006-11-14 02:18:24 · 6 answers · asked by aries 1 in Zoology

2006-11-14 02:18:02 · 4 answers · asked by JAMES 4 in Chemistry

A 8 kg fish swimming 3 m/s swallows an absent minded 1 kg fish at rest, as shown below. What is the speed of the large fish immediately after lunch in m/s?

2006-11-14 02:16:11 · 4 answers · asked by Anonymous in Biology

2006-11-14 02:15:51 · 9 answers · asked by sexywit 1 in Medicine

2006-11-14 02:14:04 · 10 answers · asked by mzee p 1 in Astronomy & Space

end where this force is applied, what force needs to be applied at the other end to keep the bar balanced?

2006-11-14 02:13:16 · 2 answers · asked by zoelee24_2003 1 in Physics

Very much like the deadliest animal question, but just mammals this time.

Repeat the answers if you want. Ones alive; now Tasmanian Tiger not included. Unfortunately, as it could have been a candidate?

2006-11-14 02:10:54 · 18 answers · asked by Perseus 3 in Zoology