Science & Mathematics - 25 June 2007

Solve 1/C=1/p+1/z for z.

2007-06-25 14:28:57 · 5 answers · asked by ashley_tisdale2006 2 in Mathematics

A 2150-kg truck is traveling along a staight, level road at a constant speed of 55.0 km/h when the driver removes his foot from the accelerator. After 21.0 s, the truck's speed is 33.0 km/h. What is the magnitude of the average net force acting on the truck during the 21.0 s interval?

2007-06-25 14:28:06 · 2 answers · asked by Tam 1 in Physics

Suppose you wish to whirl a pail full of water in a vertical circle without spilling any of its contents. If your arm is 0.91 m long (shoulder to fist) and the distance from the handle to the surface of the water is 17.0 cm, what minimum speed is required?

2007-06-25 14:27:55 · 5 answers · asked by long t 2 in Physics

please help i don't know how to solve this. i dont even understand this.. so please show a very detailed working so i can understand it. and if you know a site where i can learn all about this please do tell.. please..

let (a subs n) be the sequence defined by

a subs n = [ (n^2+8n+10) / (n + 9)]

where the [x] is the largest integer that does not exceed [x]. find the value of (the sum symbol: the one that looks like an E. well i t looks like an M rotated to the left by 90 degress.) oh and on top of the symbol is 30 and in the side there is (a subs n).

if you know the site where i can learn the basics for this stuff please tell me.. cuz its not making sense to me.

2007-06-25 14:27:18 · 3 answers · asked by quennie 1 in Mathematics

Thanks and regards.

2007-06-25 14:19:17 · 6 answers · asked by Ding 2 in Engineering

A) Anually find the balance after 10 years.

B) Conituously, find the blance after 10 years.

2007-06-25 14:18:51 · 2 answers · asked by roninshinobix 1 in Mathematics

Solve 1/F=1/w + 1/r for r

2007-06-25 14:17:44 · 13 answers · asked by ashley_tisdale2006 2 in Mathematics

2007-06-25 14:15:42 · 3 answers · asked by Anonymous in Earth Sciences & Geology

like this one.....=/

5x(2x-7)(x+1)

where do i start first??

2007-06-25 14:15:27 · 4 answers · asked by jenn_jennifer_genny 1 in Mathematics

The serial number on an airplane consists of the letter N followed by five numerals, followed by two letters. How many serial numbers are possible?

2007-06-25 14:15:10 · 4 answers · asked by roninshinobix 1 in Mathematics

A diver releases an air bubble of volume 2.0 cm³ from a depth of 15 m below the surface of the lake, where the temperature in 7.0°C. What is the volume of the bubble when it reaches just below the surface of the law, where the temperature is 20°C.

I know that the answer is 5.1 cm³, but what are the steps to reach the answer?

2007-06-25 14:14:22 · 2 answers · asked by Concerned 1 in Physics

2007-06-25 14:11:19 · 11 answers · asked by firstname_dj_a 1 in Medicine

2007-06-25 14:09:03 · 8 answers · asked by Anonymous in Mathematics

On a certain day 1/4 of the employees of an office were away on a vacation and 1/8 away on a official leave.If 270 were present, how many employees compose the office forced ?

2007-06-25 14:08:27 · 7 answers · asked by jonathanaljomargonzales 1 in Mathematics

How do you take the squareroot of ln of a number, example
sqrt(ln(4))=?

2007-06-25 14:05:40 · 5 answers · asked by leo 6 in Mathematics

this is my hp
http://www.imvu.com/catalog/web_mypage.php?user=6327898#

2007-06-25 13:58:21 · 6 answers · asked by 9 2 in Weather

Is land o'lakes florida really white trash cuz im about to move there

2007-06-25 13:55:00 · 1 answers · asked by colinhilton56 1 in Earth Sciences & Geology

Find all solutions by factoring.

x2 + 5x = 0

{5,0}

{-5,5}

{-5,0}

{0}

2007-06-25 13:54:00 · 11 answers · asked by Anonymous in Mathematics

A 10 kg baby sits on a three-legged stool. The diameter of each of the stool's round feet is 1.9 cm. A 60 kg adult sits on a four-legged chair that has four circular feet, each with a diameter of 5.8 cm. Who applies the greater pressure to the floor and by how much?

An extra _______N/m2 of pressure was applied to the floor by

2007-06-25 13:52:22 · 3 answers · asked by Ciel S 1 in Physics

Solve the equation by the zero-factor property.

x(x + 13) = 0

{-13, 0}

{-1, -13}

{1, -13}

{13, 0}

2007-06-25 13:46:41 · 7 answers · asked by Anonymous in Mathematics

a 220 kg speedboat is negotiating a circular turn (radius = 52m) around a buoy. during the turn the engine causes a net tangential force of magnitue 550 N to be applied to the boat. the initial tangential speed of the boat going into the turn is 5.0 m/s
(a) find the tangential acceleration
(b) after the boat is 2.0 s into the turn, find the centripetal acceleration

2007-06-25 13:46:41 · 3 answers · asked by lub1210 1 in Physics

I am 13 going on to 14 years old. I've already got my life figured out:
1.This summer I plan to start a hurricane forecasting website and hopefully encourage local and state officals to issue evacuation orders when there is a dangerous hurricane threatning. I also want to contribute to CNN to commentate on the hurricane coverage.
2. Then I am going to go to Cornell University to get a Masters Degree in Meterology. I want to do internships with the TV stations.
3. After I graduate I want to get married but not have children till I am 30 years old. I want at least three children.
4. age25-Then I am going to work for the Storm Prediction Center in Norman,Okalahoma for 9 years.
5. age34- I am then going to move up to the National Hurricane Center as a hurricane specialist eventually a senior hurricane specialist for 15 years age49-Then I want to go to the Weather Channel as a Tropical Weather Expert for least 15 years then semi-retire but still remain a Hurricane Contributer

2007-06-25 13:42:52 · 6 answers · asked by novapri39 2 in Weather

Looking for some help with this. It falls under superposition and undetermined coeffiients.

y" + 4y = sint - cost

I got

1/3sint - 1/3cost

just wanted to see if im getting this right

thnx

2007-06-25 13:42:42 · 2 answers · asked by The Dude 3 in Mathematics

What is the antiderivative of

e^ -3/5

please know what your doing, this is Calculus

2007-06-25 13:37:20 · 8 answers · asked by Anonymous in Mathematics

im just a private pilot. but im wondering what the whole process is like to becoming an astronaut. is some of it just luck? what the hell would the application look like? and the interview, what would that be like? what would an average day at work be like? its like "daddy come to my baseball game", "sorry i gotta go too space." while im on the space subject when do you think we will go to mars or the moon soon and are we developing technologies to destroy asteroids?

2007-06-25 13:35:15 · 6 answers · asked by amos 2 in Astronomy & Space

Log R -3 log T + 1/3 Log X

2007-06-25 13:31:39 · 7 answers · asked by roninshinobix 1 in Mathematics

meaning you if you could go to one moon and one moon only and you would be completely invincable so that no harm could or would come to you.

2007-06-25 13:29:39 · 16 answers · asked by Count DiMera 2 in Astronomy & Space

a ferris wheel rotates at an angular velocity of 0.24 rad/s. starting from rest, it reaches its operating speed with an average angular acceleration of 0.030 rad/s^2. how long does it take the wheel to come up to operating speed?

2007-06-25 13:29:01 · 1 answers · asked by lub1210 1 in Physics

I have a large equilateral triangle inscribed with another equilateral triangle and inside that is a third equilateral triangle .
How does the area of the smaller triangle compare to the area of the large triangle?
Thank you

2007-06-25 13:26:14 · 3 answers · asked by sammythe2nd 1 in Mathematics

An urn contains 5 balls, two which are marked $1, 2 balls$ 5, and one$15. A game is played by paying$ 10 for winning the sum of the amounts marked on two balls selcted randamoly from urn. Is this a fair game.

2007-06-25 13:19:57 · 2 answers · asked by Anamika 2 in Mathematics