Science & Mathematics - 8 August 2007

I don't even know how to approach this! Please help and the steps for me!

Factor completely:
6y^4 - 15y^3

2007-08-08 13:15:10 · 2 answers · asked by Katie M 2 in Mathematics

A (2,3) B (7,4) and C (4,6)?
Express your answer as a decimal to the nearest tenth.

2007-08-08 13:11:54 · 3 answers · asked by Anonymous in Mathematics

if you could some how travel twice the speed of light away from earth, could you stop at any point, and look through some sort of telescope, and see your self leaving?

2007-08-08 13:11:40 · 5 answers · asked by Anonymous in Physics

He found 3 more dimes than nickels but twice as many quarters than dimes. The total value of the coins was $5.05, How many coins of each type did Sam find?

2007-08-08 13:09:18 · 3 answers · asked by Tim M 1 in Mathematics

Theres angle A then there is (2b) another angle is 60 and the bottom one is (3c) tha angles are on an X shape

like this

.........A
(2B)X 60
.......(3C)

The question is Find A B C and the answers are

a= 120 b=30 c=40

i dk how to get that can someone tell me plz

2007-08-08 13:09:14 · 3 answers · asked by ŁỤĭŞ 5 in Mathematics

Explain in your own words how to factor a polynomial of the form ax2 + bx + c when a is not equal to 1. Describe both the grouping approach as well as reversing FOIL. Contrast the two methods by means of an example. Discuss which is the best approach and why.

2007-08-08 13:05:46 · 1 answers · asked by Texas Rose 3 in Mathematics

Please help me..This is for our investigatory project. Thanks for your help...

2007-08-08 13:02:39 · 5 answers · asked by mara_malaluan 3 in Engineering

An isoceles trapezoid may be divided into 3 congruent non-overlapping equilateral triangles. The area of each triangle is 9 square root 3 , square inches. What is the number of inches in the perimeter of the trapezoid?

2007-08-08 13:02:28 · 3 answers · asked by Anonymous in Mathematics

Well his birthday is coming up and he wants to do something out of the norm I guess u might say well he wants me,my hubby him and a couple of friends to go visit "haunted" places sights or whatever. Anyways does anyone know of any place in MA or NH that might be good for a good scare?

2007-08-08 12:55:30 · 12 answers · asked by littlemama 2 in Paranormal Phenomena

This statement is taken from a wind energy site (http://www.reuk.co.uk/Wind-Turbine-Water-Heating.htm):

Direct Wind Turbine Water Heating
"It is not usually possible to connect a 12 Volt water heating element directly to the output from a wind turbine. The voltages generated by a 12 Volt wind turbine are typically far in excess of their nominal 12 Volt rating - values of over 50 Volts can often be recorded in heavy winds which would rapidly burn out the heating element..."


Some figures:

Wind alternator rating: 12 volts, 200 amps @ 6,500 rpm
Heating element rating: 5,000-6,500 watts (Incoloy material)

As the figures above show, the power output of the wind turbine is well within the operating parameters of the heating element. Since the heating element can withstand the power output of the alternator (assuming it runs at a constant 6,500 rpm), in practice, will it be OK to do so? If more than two heating elements are used, will that translate to better safety and reliability?

Tnx!

2007-08-08 12:53:30 · 2 answers · asked by ellemuor 1 in Engineering

2007-08-08 12:52:08 · 3 answers · asked by Tim M 1 in Mathematics

2007-08-08 12:50:16 · 3 answers · asked by Sublime 33 1 in Mathematics

2007-08-08 12:42:14 · 2 answers · asked by Lynnie 1 in Earth Sciences & Geology

twice that of the slower car. After 8 hours the cars are 540 KM apart. How fast is each car traveling.

2007-08-08 12:42:03 · 3 answers · asked by coachpeddie 2 in Mathematics

25 seconds less than her brother. What is the lenght of the track?

2007-08-08 12:40:39 · 2 answers · asked by coachpeddie 2 in Mathematics

After launch when the crew does the "roll program" are the shuttles ailerons used or is it done some other way?

2007-08-08 12:35:15 · 2 answers · asked by lennyspall@sbcglobal.net 2 in Astronomy & Space

(-3,0) and (4,0) Thank you

2007-08-08 12:35:08 · 11 answers · asked by vadataborn 2 in Mathematics

first how does a black hole have such an enormous gravitational pull? alsohow heavy is a black hole exactly? ive heard that if somethin with mass moves at the speed of light it has nearly infinite weight...is that true? and if so would somethin movin that fast be heavier than a black hole? ive also heard that black holes grow in wieght but not mass(unless i guess if 2 black holes merged together or somethin)...true?

and im not sure if any1 can answer this question but how in the wrld is a black hole infintly deep? that doesnt make any sense to me.

2007-08-08 12:34:56 · 9 answers · asked by Anonymous in Astronomy & Space

2007-08-08 12:33:29 · 7 answers · asked by Anonymous in Astronomy & Space

2007-08-08 12:30:23 · 2 answers · asked by Tim M 1 in Mathematics

a pendulum is released from rest at a displacement of .28 m from its equilibrium position. it is stopped abruptly and uniformly at its equilibrium position and it is observedthat a loose bit of metal slides without resistance of the pendulum and falls to the floor 2.06 m below.

if the projectile started off with a velocity in just its horizontal direction, and if travels .44 m in the horizontal direction during its fall, what was the velocity of the pendulum at equilibrium?

what is the period of motion of the pendulum?

2007-08-08 12:29:33 · 3 answers · asked by e=mc^2 1 in Physics

Suppose a pitcher faces a batter who never swings and furthermore the pitcher throws balls ans strikes at random. For how many ball/strike sequences will the batter be called out on strikes on the 5th pitch?

please explain your answer so I can understand how this is done...thanks

2007-08-08 12:24:08 · 2 answers · asked by C K 3 in Mathematics

ive heard that light might have mass. ive also heard that wen something reaches the speed of light its weight is almost infinite. so if light had mass would it be heavier than a black hole? if light doesnt hav mass the forget about evrythin i jus said lol. i want some real answers

2007-08-08 12:23:13 · 5 answers · asked by Anonymous in Astronomy & Space

What do you Believe is the Cause of Gravity?
Explain what you think it is, and how it may be Operating.

2007-08-08 12:17:13 · 6 answers · asked by Anonymous in Physics

They are sending a probe to mars that will have the capability of Drilling beneath the surface, Do you think there will be any forms of life there, since there may be water under the surface?

2007-08-08 12:15:33 · 14 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-08 12:14:24 · 3 answers · asked by bsko24fast 1 in Physics

I don't see how there could ever be a limit to how small Anything could Get, Wouldn't it Be possible to take half of a measurement, and keep dividing it in half for Eternity, and Never ever have an end?

2007-08-08 12:11:34 · 9 answers · asked by Anonymous in Physics

Please help : (

2007-08-08 12:11:21 · 5 answers · asked by Texas Rose 3 in Mathematics

Find the degree measure of either of the exterior angles formed by extending the base of an isoscele triangle if the vertex angle of the triangle measures:
b. 82 degree
c. 40 degree

thank you!

2007-08-08 12:10:34 · 3 answers · asked by Anonymous in Mathematics

How many does it usually take for one person to trip?

And how many hours does it last?

2007-08-08 12:01:50 · 4 answers · asked by Anonymous in Botany