Science & Mathematics - 20 September 2007

2007-09-20 14:45:39 · 8 answers · asked by Lakers24 2 in Engineering

2007-09-20 14:45:10 · 4 answers · asked by Lakers24 2 in Engineering

Can you explain why they are alike and if not why they aren't

2007-09-20 14:44:33 · 6 answers · asked by Lakers24 2 in Physics

What is the wavelength of electromagnetic radiation that has a frequency of 3 x 10 (to the 16th power) Hz? In what part of the spectrum does this radiation occur?

2007-09-20 14:44:01 · 2 answers · asked by New Mommy 1 in Physics

A box with a mass of 20 kg, slides a ramp with an acceleration of 0.4 m/s2. The ramp is at an angle θ = 10°. What is the force of friction and coefficient of dynamic friction, μk, between the box and the ramp.
(I don't understand non-equilibrium questions)

2007-09-20 14:42:41 · 3 answers · asked by Laduch 2 in Physics

2007-09-20 14:42:10 · 6 answers · asked by Lakers24 2 in Engineering

2007-09-20 14:38:05 · 1 answers · asked by kelisha j 1 in Geography

Please explain why steel is denser than wood.

2007-09-20 14:37:45 · 12 answers · asked by Anonymous in Other - Science

is there a species of ants that can eat people?

2007-09-20 14:36:58 · 2 answers · asked by larry m 1 in Botany

2007-09-20 14:33:16 · 1 answers · asked by Dale G 2 in Mathematics

ok its a trick question


if 26 clowns can blow up 26 balloons in 26 mintute, how many clowns does it take to blow up 78 balloons in 78 minutes?




ps,its not 78 clowns....

2007-09-20 14:33:06 · 6 answers · asked by psycho_girl94 2 in Mathematics

2007-09-20 14:30:33 · 2 answers · asked by Anonymous in Chemistry

The puzzle says that you have to draw 15 circles like this:
( )( )( )( )( )
( )( )( )( ) You have to put the numbers 1-15 into it.
( )( )( ) You can't use any number twice
( )( ) and you have to subtract the two numbers
( ) like this :

(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 ) - ( 5 )

15 - 14 = 1, the 1 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 )
14 - 2 = 12 ,the 12 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12)
12 - 8 = 4, the 4 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 )
8 - 3 = 5, the 5 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 ) - ( 5 )
And so on and so fourth.

Please help,
John

2007-09-20 14:30:16 · 2 answers · asked by John 2 in Mathematics

2007-09-20 14:28:50 · 3 answers · asked by Naveed 2 in Mathematics

2007-09-20 14:26:09 · 4 answers · asked by Anonymous in Mathematics

Would the world as we know it exist?

2007-09-20 14:26:08 · 8 answers · asked by Anonymous in Astronomy & Space

How many grams are in 250.0 mL of water, can someone help me with this and tell me how you got it?

2007-09-20 14:25:34 · 2 answers · asked by Anonymous in Chemistry

directions say: c=5/9(f-32) for 212 degrees Fahrenheit. how do i figure this out!?

2007-09-20 14:24:07 · 7 answers · asked by k o 2 in Mathematics

2007-09-20 14:22:44 · 6 answers · asked by natdog18 2 in Mathematics

2007-09-20 14:17:33 · 8 answers · asked by harperstuf 1 in Weather

How do the properties of a compound, in general, compare to the properties of the elements that constitute it? Give an example of a common compound and the elements of which it is composed to illustrate your answer.

2007-09-20 14:17:23 · 3 answers · asked by Ryoma Echizen 3 in Chemistry

how do you know how many significant figures there are for a number like what are the rules...oh and like when do you use cientific notation with sig figs and when dont you....EXAMPLES PLEASE!

2007-09-20 14:14:21 · 2 answers · asked by Anonymous in Mathematics

2007-09-20 14:14:19 · 2 answers · asked by iluvunda559 1 in Chemistry

how do solve a problem like this:

-3a + 16
4

it's a division bar problem

2007-09-20 14:11:56 · 8 answers · asked by H.U. Soldier 2 in Mathematics

2007-09-20 14:09:27 · 6 answers · asked by Anonymous in Weather

1. For what value of the constant c is the function f continuous on (-infinity, +infinity)? f(x)=cx^2+3x if x is less than 2 and x^3-cx if x is greater than or equal to 2

2. Find the limit. Limit as x approaches negative infinity, x+(sqrt.x^2+5x)

Gracias!

2007-09-20 14:07:50 · 2 answers · asked by stars_sun_sky 1 in Mathematics

2007-09-20 14:07:03 · 8 answers · asked by Vanessa B 1 in Mathematics

True or False.....................

arctan(x)=arcsin(x)/arccos(x)

and explain why.

2007-09-20 14:05:43 · 1 answers · asked by sportsguy1015 2 in Mathematics

Is there any research to suggest that a breastfeeding mother shouldn't use hydrocortisone cream? My daughter has been sick since I started using it...just a coincidence?
I was given it for a terrible bee sting, is this unusual? I'm not too trusting of the pharmasist who assured me it would be fine.

2007-09-20 14:04:57 · 1 answers · asked by MJC 2 in Medicine

A space vehicle accelerates uniformly from 65m/s at t=0 to 162m/s at t=10.0s. How far did it move between t=2.0s and t=6.0s?

I'm having problems on how to find the positions for 2.0s and 6.0s.

2007-09-20 14:04:37 · 1 answers · asked by Mimi 1 in Physics