Science & Mathematics - 27 November 2007

A clarinet behaves like a tube closed at one
end.
The velocity of sound is 344 m/s :
If its length is 1.9 m, what is its fundamen-
tal frequency? Answer in units of H

2007-11-27 12:36:56 · 3 answers · asked by yoyoyoyoyoyo 2 in Physics

2007-11-27 12:36:18 · 7 answers · asked by isis r 1 in Mathematics

2007-11-27 12:35:25 · 2 answers · asked by Anonymous in Engineering

2007-11-27 12:33:24 · 4 answers · asked by allan a 1 in Other - Science

estimate the answer to the following question:
what number is 1/4 of 31.975?


find the quotent of 120/5


7divided by 5 5/6

2007-11-27 12:31:42 · 5 answers · asked by Anonymous in Mathematics

this is 4 central sterile processing

2007-11-27 12:28:29 · 5 answers · asked by todd d 1 in Engineering

Ok in my algebra class, I am doing intersection and union. I am not sure what i would do:
A={4,5,6,7}
B={5,6}
C={8,9,10}
D={6,9}

So what would I do if it was

A intersection B union C intersection D

Sorry I cant get the upside down u's on my computer
Thanks to anyone who can help!

2007-11-27 12:28:16 · 2 answers · asked by beachvolleysjh 2 in Mathematics

solve for x..

c=x-a/b

2007-11-27 12:28:03 · 1 answers · asked by djtylomusic 1 in Mathematics

A 55 kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0 m/s. (Ignore small changes in gravitational potential energy.)


(a) How fast is he going as he lands on the trampoline, 3.0 m below?
___ m/s
(b) If the trampoline behaves like a spring of spring constant 5.2 104 N/m, how far does he depress it?
___m





A 0.590 kg wood block is firmly attached to a very light horizontal spring (k = 200 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the coefficient of kinetic friction between the block and the table?





can anyone do any of that?!?!?

2007-11-27 12:26:53 · 1 answers · asked by lcbby 1 in Physics

Let f be the function that is given by
f(x)= ax+b/ x^2-c

i) the graph of f is symmetric with respect to the y-axis
ii)lim as x --> 2 + = infinity
iii) f ' (1) = -2

Determine the values of a, b, and c.

if anyone knows please help! I have spent hours and can't figure it out completely!

2007-11-27 12:26:50 · 1 answers · asked by r0ckch1c4lyfe 1 in Mathematics

a 150 ft run of DWV PVC plastic drainage line is suddenly subjected to a flow of hot water from an industrial process. the effective tempreature of the pipe rises to 120 deg-F from the factory tempreature of 60 deg-F. by how many inches will it increase in length ??

2007-11-27 12:24:33 · 2 answers · asked by masrbobo 1 in Engineering

(19 - 9*19^(1/2)) / (19+9*19^(1/2))

2007-11-27 12:24:29 · 4 answers · asked by Question101 2 in Mathematics

2007-11-27 12:23:33 · 9 answers · asked by trackman 3 in Paranormal Phenomena

Let Q = (0,6) and R= (8,11) be given points in the plane. We want to find the point P=(x,0) on the x-axis such that the sum of distances PQ+PR is as small as possible. (Before proceeding with this problem, draw a picture!)
To solve this problem, we need to minimize the following function of x:
f(x)=
over the closed interval [a,b] where
a=
b=
We find that f(x) has only one critical number in the interval at x=

where f(x) has value of:

Since this is smaller than the values of f(x) at the two endpoints, we conclude that this is the minimal sum of distances.

2007-11-27 12:23:17 · 2 answers · asked by MA35 3 in Mathematics

look. i really need some help. can you give me a hand with these questions? can you please help find the solution to these equations?

1. x-2>4
2. z-6<4
3. y-1/2>2
4. x-1.5<3.5
5. x+3>6
6. 19 7. d+1/4>3
8. -31/2 >c+1/2
9. y-4_>4
10. 25_ 11. 3t>6
12. 2x_<12
13. 15_<3y
14. -10_<4h
15. -6y<24

2007-11-27 12:22:31 · 5 answers · asked by Anonymous in Mathematics

2007-11-27 12:21:52 · 4 answers · asked by JS 1 in Weather

Just think about it. It can't be just a coincidence that they form like that. And it's true that no two snowflakes are alike cause a scientist took pictures of 400,000 snowflakes and none of the them were alike! Only God could do this. What do you think?

2007-11-27 12:20:30 · 10 answers · asked by somebody 2 in Earth Sciences & Geology

SHHHHHH-SCIENCE HELPPPP :P

2007-11-27 12:20:28 · 9 answers · asked by Anonymous in Earth Sciences & Geology

britsh soldier lichen, paramecium, radiolarians, sporangia, pretzel slime mold, ulva, volvox, witch's hat fungus, plasmodium vivax, yeast, and zooflagella...its for a scienece project for tomorrow...plz help me...asap


ok thank!!!
-♥nATalY♥

2007-11-27 12:20:16 · 1 answers · asked by NATALY L 2 in Botany

Materials and Methods:
50 paper cups were used for this experiment. 100 milliliters of room temperature water was put in each cup. 10 cups were set aside in 5 groups so that 10 cups were in each group. In the first 10 cups, 25 mL of Wesson vegetables oil was put into the cups. In the next 10 cups, 25 mL (5.07 teaspoons) of Morton salt was put in the cups. 25 mL of Tide laundry detergent was put in the next 10 cups, and 25 mL of Rutter’s 1% low fat milk was put in the next 10 cups. 10 cups with 125 mL of water was then left for the control. These 50 cups were put under 5 lights each with 5 new 60-watt light bulbs. The light was spaced out evenly so that each cup received the same amount of light. Each cup was measured once a day for depth of the substance and the average was found for each group twice a day. The experiment went on for 5 days.

Whould I change anything? My teacher asked how I can I tell that only the water evaporated and not the substances? Any input?

2007-11-27 12:19:35 · 5 answers · asked by fluorine DX4 3 in Chemistry

I know that I am not the first to ask this question. Many, many have asked it before.

By the calculations of many prominent astronomers (like Drake) there could be billions and billions of intelligent civilizations out there in space. Many of them could be millions of years ahead of us. They might have developed radio technology MILLIONS of years ago.

So one would think that there would be endless communications, messages, pulses, and images floating around out there. There would have been things traveling through the cosmos from far, far away and we should be picking them up.

Why aren't we?

We have heard nothing, this far.

Why is this?

Could it be that we are alone? Or that it just happens that all the other civilizations out there are 'pre-radio'?

I just don't get it.

And while this question has been asked before, I have just never heard a really good answer to it.

What are your thoughts about this?

Thank you.

2007-11-27 12:14:45 · 10 answers · asked by Zezo Zeze Zadfrack 1 in Astronomy & Space

Why or why not?

2007-11-27 12:12:38 · 10 answers · asked by Anonymous in Astronomy & Space

the table shown represents a linear function. what is the value of "t" when h=157?
t=1 2 3 ?
h=2 7 12 157

2007-11-27 12:11:40 · 2 answers · asked by Anonymous in Mathematics

A are found in the nucleus along with the protons.
B occupy the space surrounding the nucleus.
C have a positive charge.
D are attached to the positive charge of neutrons.

2007-11-27 12:10:31 · 9 answers · asked by Anonymous in Chemistry

2007-11-27 12:09:15 · 1 answers · asked by bluelinerjr 1 in Earth Sciences & Geology

The sun has a diameter of 870,000. The earth a diameter of 8,000mi. If a 24 cm diameter basketball is used as the model for the sun, what should be the diameter of the model earth?

2007-11-27 12:09:05 · 9 answers · asked by Anonymous in Mathematics

for an experiment

2007-11-27 12:08:06 · 2 answers · asked by deltalgammaray 1 in Chemistry

B. Calculate the volume of air at 25ºC and 1.00 atmosphere pressure that is needed to burn completely 15.0 grams of propane. Assume that oxygen has a density of 1.31 g/L at 25ºC and that air is 21.0% O2 by volume.

C. The heat of combustion of propane is –2,220 kJ/mol. Calculate the heat of formation, ΔHfº, of propane given that ΔHfº of H2O(l) = –285.3 kJ/mol and ΔHfº of CO2(g) = –393.5 kJ/mol.

D)Assume that all the heat given off in burning 20.0 grams of propane is transferred to a quantity of water (Cp = 4.184 J/g • K). The water increases in temperature from 18.0ºC to 37.0ºC. What volume (L) of water was heated

2007-11-27 12:06:55 · 1 answers · asked by BrunetteBeauty 2 in Chemistry

How do wild animals keep from inbreeding? Like in a pride of Lions, the same male stays for several years and all of his female cubs stay in the pride. How do their babies not get deformed or something?

2007-11-27 12:06:41 · 6 answers · asked by tayler 1 in Zoology

I am having surgery on Thursday, and i am having a General Anesthesia, and my doctor gave me a list of medicines that im not allowed to take.
Tylenol was not on there, so after i took some today after a headache, i realized that it said that it had Acetaminophen, and i was wondering if thats a a good thing...?

2007-11-27 12:05:41 · 5 answers · asked by oscarrr 2 in Medicine