Science & Mathematics - 30 October 2007

also, sounds really stupid by how can a full moon work if the earth is in between the sun and the moon when this occurs? i no that it obviously does work, so what am i missing out here?! thanks!

2007-10-30 01:53:29 · 2 answers · asked by Hannah D 1 in Astronomy & Space

The flywheel of a steam engine runs with a constant rotational velocity of 150 rev/min. When the steam is shut off, the friction of the bearings and of the air stops the wheel in 2.2 h. (a) What is the constant rotational acceleration, in revolutions per minute-squared, of the wheel during the slowdown?

(b) How many rotations does the wheel make during the slowdown?

(c) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the translational acceleration of a flywheel particle that is 50 cm from the axis of rotation? (d) What is the magnitude of the net translational acceleration of the particle in (c)?

Explain your work. Thanks! :)

2007-10-30 01:50:04 · 1 answers · asked by Anonymous in Physics

The flywheel of a steam engine runs with a constant rotational velocity of 150 rev/min. When the steam is shut off, the friction of the bearings and of the air stops the wheel in 2.2 h. (a) What is the constant rotational acceleration, in revolutions per minute-squared, of the wheel during the slowdown?

(b) How many rotations does the wheel make during the slowdown?

(c) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the translational acceleration of a flywheel particle that is 50 cm from the axis of rotation? (d) What is the magnitude of the net translational acceleration of the particle in (c)?

Explain your work. Thanks! :)

2007-10-30 01:47:53 · 2 answers · asked by Anonymous in Physics

the question goes: a car accelerates uniformly over a straight level road if at point A the car travells at 30m/s and at point B it travells at 60m/s find the velocity the car travells at C which is the midpoint of the line AB

2007-10-30 01:44:17 · 3 answers · asked by nightdevil 1 in Mathematics

Solve each irrational equation. If an equation has no solution, so state:
a. 3/x - 1/6 = 1/x
b. 13/y-1 - 3 = 1/y-1

A car travels 60 miles in the same time that a car traveling 10 per hour faster travels 90 miles. What is the rate of each cars?

Find the indicated root or state that the expression is not a real number:
a. 3sqrt8/125 This is the cube root of 8/125
b. -4sqrt81

Simplify each expression:
a. sqrt45x^23
b. sqrt96/3

Add or subtract as indicated:
a. 4sqrt72 - 2sqrt48
b. sqrt75 - sqrt48

2007-10-30 01:37:47 · 3 answers · asked by Anonymous in Mathematics

i want to know if how they name the stars, what are the the bases for naming them,...(^_^)

2007-10-30 01:37:22 · 5 answers · asked by serenity 1 in Astronomy & Space

question
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. The student hears two resonances at 51.5Hz and 60.0Hz. How deep is the well ?

Can you give me an explanation and an answer .. the answer should be 21.5m

I don't know where to start and where to finish with this question.. the txt book is not helping .. just half of a page .. so am basically stuck.. being at it for 3 hrs...
Thank you...

2007-10-30 01:28:45 · 2 answers · asked by Anonymous in Physics

2007-10-30 01:25:13 · 4 answers · asked by ~Jesus*Girl~ 2 in Chemistry

thanks

2007-10-30 01:24:19 · 10 answers · asked by Cetza 2 in Medicine

2007-10-30 01:10:07 · 4 answers · asked by mikey 2 in Astronomy & Space

we havnt heard from him in so long. and with so many UFO sightings im wondering if theres a conection.

2007-10-30 01:04:01 · 7 answers · asked by Anonymous in Astronomy & Space

2007-10-30 01:02:38 · 5 answers · asked by Anonymous in Mathematics

2007-10-30 01:02:06 · 1 answers · asked by vikas sharma 1 in Mathematics

I know it's a daft question but my daughter asked me yesterday & it's just popped back into my head, lol.

2007-10-30 01:01:25 · 6 answers · asked by Mimkat hate the new Yahoo Answers so has retired. 7 in Zoology

is there life in mars? if not, whats the reasons for that? is it the technology or.....

2007-10-30 00:43:59 · 10 answers · asked by Breed 2 in Astronomy & Space

How is infinite series of sin, cos and also exponent series derived, could you tell me detailed about it, i know it come from the taylor polynomial but how the taylor polynomial is derived..

2007-10-30 00:41:01 · 3 answers · asked by datuk M 2 in Mathematics

we can solidify mercury byadding sulphur. but btaned mercury is impure. now how can we retain the solid mercury by removing impurities and making it pure. is there any other process.

2007-10-30 00:37:49 · 1 answers · asked by vijay r 1 in Chemistry

i mean take a look at the U.S stealth technology! hey?!! where did they got it?? does it relate to alien technology. I am just wondering about... I need opinion people help me thanks

2007-10-30 00:36:24 · 9 answers · asked by bambz 1 in Astronomy & Space

if sky is blue daytime why not night?

2007-10-30 00:05:45 · 5 answers · asked by squibpicklearrow 1 in Earth Sciences & Geology