Science & Mathematics - 19 October 2007

A carousel has a radius of 17 feet and takes 28 seconds to make one complete revolution. What is the linear speed of the carousel at its outside edge? Express the answer in feet per second. If neccessary, round the answer to two decimal places.

a. 106.81
b. 10.35
c. 0.61
d. 3.81

2007-10-19 11:36:25 · 5 answers · asked by hana 1 in Mathematics

2007-10-19 11:31:32 · 9 answers · asked by mike w 1 in Zoology

2007-10-19 11:29:42 · 3 answers · asked by simranjit chera 1 in Chemistry

Im not looking for Hell or molten larva just about 100 degrees C

2007-10-19 11:29:09 · 9 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-19 11:25:09 · 1 answers · asked by thelly 1 in Medicine

Starting with an initial speed of 5.00 m/s at a height of h = 0.330 m, the m1 = 1.45 kg ball swings downward and strikes the m2 = 4.40 kg ball that is at rest, as the drawing shows.


(a) Using the principle of conservation of mechanical energy, find the speed of the 1.45-kg ball just before impact.
i know this = 5.61 m/s
(b) Assuming that the collision is elastic, find the velocities (magnitude and direction) of both balls just after the collision.
(1.45-kg ball)= i know this is -2.829 m/s
*(4.40-kg ball)=?
(c) How high does each ball swing after the collision, ignoring air resistance?
*(1.45-kg ball)=?
* (4.40-kg ball) =?
i can't figure out the starred ones

2007-10-19 11:22:07 · 1 answers · asked by samiam389 1 in Physics

I have a problem... i bought this land a while ago and have the info..... apn parcel number as they say..... ok i have coordinates from the closest street to get the my land.... these are the coordinates 118° 40' 54" W
34° 27' 49" N , how do i understand these coordinates the land is in Santa Clarita CA.... 3 Acres.... is there a website that tells me this.... i know a couple websites that search APN( Parcel Number) and gives me a view of the land but not in Satelite view meaning it doesnt show me if my land has mountains or something. it is a paper type of view.... can anyone help me with the coordinates and can anyone help me on telling if my land has mountains PLZ......I KNOW THIS ? IS OCCURED PLZ PEOPle HELP ME!!!!!!!!!!!!!

2007-10-19 11:22:04 · 3 answers · asked by thushief27 1 in Geography

Use linear approximation, i.e. the tangent line, to approximate
16.2^(1/2) as follow:

Let f(x)=x^(1/2). The equation of the tangent line to f(x) at x=16 can be written in the form of y=mx+b where m is:______. and where b is:______.

Using this, we find our approximation for 16.2^(1/2) is ______.

2007-10-19 11:21:54 · 2 answers · asked by Anonymous in Mathematics

R = 200 Ω, C = 2.0 μF. Initially the capacitor is charged up to 100 Volts. Then the switch is closed, and the capacitor is discharged. Select True or False for the following statements.

The time constant τ of the circuit is 4.00E-4 s.? true or false
If the resistance R is doubled, then the capacitor will be discharged twice as slow. true or false?
After one time constant the voltage across the resistor is 36.8 V. true or false

2007-10-19 11:21:28 · 1 answers · asked by Anonymous in Physics

2007-10-19 11:19:55 · 11 answers · asked by Anonymous in Mathematics

A company begins an advertising campaign in a certain city to market a new product. The percentage of the target market that buys the product is a function of the length of the advertising campaign. The company estimates this percentage as 1-e^-0.05t where t=number of days of the campaign. The target market is estimated to be 1,000,000 people and the price per unit is $0.40. The cost of advertasing is $1000 per day.
Find the length of the advertising campaign that will result in the maximum profit.

P.S. Please list all the steps taken to answer the problem. Im interested in learning also, not just getting the answer.

2007-10-19 11:19:08 · 2 answers · asked by Meloa 3 in Mathematics

Prove without a calculator:
tan(50)*tan(25)*tan(75) - tan(75)+tan(50)+tan(25)=0

2007-10-19 11:14:47 · 4 answers · asked by Amir B 1 in Mathematics

the college board reports 2% of the 2 million high school students who take the SAT each yr get special accomadations because of documented disablities. consider a random variable of 25 students who have tkaen the test
a) what is the probablity that exactly 1 recieved special accomadation?
b) what is the probablity that least1 recieved special accomadation?
c) what is the probablity that at least 2 recieved special accomadation?
d)what is the probablity that the number among the 25 who recieve a special accomodation is within 2 deviations of the number you would expect to be accomadated?
e)suppose that a student who does ot recieve a special accodadtion is allowed 3 hrs for the exam, where as an accomodated student is allowed 4.5 hrs. what would you expect the average time allowed the 25 students to be?

2007-10-19 11:10:33 · 3 answers · asked by LaShonde B 1 in Mathematics

what is Nonlinearity system, someone can me a example>?

2007-10-19 11:07:06 · 1 answers · asked by Anonymous in Other - Science

All three sides of the triangle have equal length. What is the perimeter. One side is 9x-4 and the bottom is 2(3x+4)?

2007-10-19 11:06:10 · 5 answers · asked by Donald C 1 in Mathematics

is lightning struck wood valuable? I have heard that the wood after it has been struck you can sell it for pretty good money. is this true? if it is can you tell me how much it is worth so that i know. thank you!!!!

2007-10-19 11:05:11 · 13 answers · asked by john 1 in Weather

Form an identity by completing the following equation.
4cos^2 t + 3sin^2 t =

Thanks for the help!

2007-10-19 11:02:43 · 6 answers · asked by sillyboys_trucksare4girls 2 in Mathematics

1. The sum of three numbers is 301. The second number is 3 less than twelve times the first number. The third number is 4 more than seven times the first number. Find the three numbers.

I need to know how you get the answers also.

2007-10-19 11:01:31 · 5 answers · asked by Anonymous in Mathematics

2007-10-19 10:57:15 · 3 answers · asked by Anonymous in Engineering

What presentation is the best and has the best chance of working?

2007-10-19 10:49:55 · 8 answers · asked by Anonymous in Other - Alternative

I am looking for medium orange, darker burgandy, and ivory flowers that are considered in season in the fall. They would be used for wedding bouquets. I'm not a fan of roses. The more unknown and unusual, the better.
A florist will be consulted when I have a better idea of what I want.

2007-10-19 10:49:21 · 2 answers · asked by Amanda G 2 in Botany

2007-10-19 10:47:07 · 5 answers · asked by jaks_bad_ass 2 in Geography

2007-10-19 10:42:17 · 4 answers · asked by Anonymous in Physics

you would think that they would have found another way to do things by now.

2007-10-19 10:38:51 · 8 answers · asked by LOST_fanatic:)! 4 in Other - Science

How likely is it that we get hit by it in 2036? What are your thoughts on this?

2007-10-19 10:36:02 · 8 answers · asked by Me 2 in Astronomy & Space

If a figure is a parallelogram and has 4 right angles, then it is a rectangle.

Please explain whether it's true OR false.

Thanks. ( its for my math homework) =]

2007-10-19 10:34:02 · 3 answers · asked by Anonymous in Mathematics

2007-10-19 10:33:35 · 3 answers · asked by Anonymous in Zoology

Which of the following designations, polar or nonpolar, are correct for the given compounds below ?
a) HBr : polar
b) CF4 : polar
c) CH3CH2CH2OH : nonpolar
d) I3- : polar

There can be more than one answer.

2007-10-19 10:31:08 · 3 answers · asked by Anonymous in Chemistry

2007-10-19 10:29:58 · 9 answers · asked by Anonymous in Mathematics

Anhydrous sodium carbonate was added to aspirin. I have the equation for this right I think, the R-COOH (of aspirin) --->R-COONa and H2O and CO2 are formed.
Then dilute HCl is added and effervescence is observed. What is the reaction occurring in this part?
Thanks

2007-10-19 10:28:05 · 2 answers · asked by lalala123 1 in Chemistry