Science & Mathematics - 17 October 2007

Please show work!!! lol

2007-10-17 10:54:25 · 5 answers · asked by Anonymous in Mathematics

2007-10-17 10:53:18 · 4 answers · asked by Anonymous in Mathematics

A doctor a while ago told me that my finger was longer because I have higher level of testosterone, which is true, he said that has some kind of influence in my brain but he didn't said anything else.
I was wondering if anyone have heard anything about it.

2007-10-17 10:52:51 · 2 answers · asked by Anonymous in Medicine

A small metal ball is suspended from the ceil-
ing by a thread of negligible mass. The ball
is then set in motion in a horizontal circle so
that the thread describes a cone.
The acceleration of gravity is 9.8 m/s2.
What is the speed of the ball when it is in
circular motion? Answer in units of m/s.
How long does it take Tperiod for the ball to
rotate once around the axis? Answer in units
of s.

2007-10-17 10:52:25 · 1 answers · asked by PhysicsDumbass 1 in Physics

Find a value for k so that the line through (4,k) and (-2,-1) is parallel to y= -2x+ 3 over 2.

Please show work and thanks!

2007-10-17 10:51:41 · 1 answers · asked by donutss 1 in Mathematics

Please... okay....

A batting average is the ratio of baseball hits to at-bats, expressed as a decimal. If a player with 540 at-bats has a batting average of 0.350, how many hits did the player make?

please smart people.......

2007-10-17 10:51:30 · 17 answers · asked by hey 3 in Mathematics

Is the above statement true or false?

2007-10-17 10:51:02 · 5 answers · asked by Pinsir003 3 in Mathematics

I know that they are very common such as having 4 valence electrons but in 8th grade language could you explain to me what else they have in common?

2007-10-17 10:50:09 · 2 answers · asked by dothemooshoo247 3 in Chemistry

A zip line is a taut rope or cable that you can ride down on a pulley. The zip line at the right goes from a 9 foot tall tower to a 6 foot tall tower. The towers are 20 feet apart. What is the slope of the zip line?

Please show your work and thank-you for your time!

2007-10-17 10:49:19 · 8 answers · asked by donutss 1 in Mathematics

A block is placed on a inclined plane.
The acceleration of gravity is 9.8 m/s2 The acceleration of gravity is 9.8 m/s2.
A 25 N force is required to push the block
up the incline with constant velocity.
What is the weight of the block? Answer in
units of N.

2007-10-17 10:47:49 · 3 answers · asked by PhysicsDumbass 1 in Physics

F - (kx) = a[(kx)/b)]

if you could give a step by step breakdown on how in the world you solve for "x" i would be more then grateful.

Thanks!

2007-10-17 10:47:45 · 3 answers · asked by jerseyshore man 2 in Mathematics

A triangle has sides of length 5 and 6 units. The length of the third side is x unites, where x is and integer. What is the largest possible perimeter of the triangle...
explanation please........... 1st good answer gets 10 points.

pce

2007-10-17 10:46:51 · 1 answers · asked by Anonymous in Mathematics

Please explain and i will award best answer ;)

2007-10-17 10:46:11 · 1 answers · asked by Inquisitive 1 in Other - Science

2007-10-17 10:45:27 · 5 answers · asked by Unknown 1 in Chemistry

2007-10-17 10:44:14 · 3 answers · asked by Ron H 1 in Astronomy & Space

2007-10-17 10:44:01 · 2 answers · asked by cheshirecat192 3 in Chemistry

Please explain. I read stuff in Wikipedia but it doesnt say why the mesophere is cold or what makes it cold. Thanks

2007-10-17 10:43:45 · 2 answers · asked by pia v 1 in Weather

I have a 1yr old chameleon and looking to fine interesting food to feed him

2007-10-17 10:43:23 · 5 answers · asked by superstiney 1 in Zoology

The planet Mars has a mass of 6.1 * 10^23 kg and radius of 3.2 * 10^6 m. What is the acceleration of an object in free fall near the surface of Mars? The value of the gravitational constant is 6.67259 * 10^-11 N*m^2/kg^2. Answer in units of m/s^2.

2007-10-17 10:43:08 · 2 answers · asked by josh j 1 in Physics

1. (8b^3/c^3)^2(b^2c/4)^2

2. (12a^-2b^-2c^6/36a^-2c^7)^-3(a^-2b^5/3b^4c^3)^2

2007-10-17 10:42:33 · 1 answers · asked by ..... 1 in Mathematics

How much solid NaCN must be added to 1.0 L of a 0.5 M HCN solution to give a pH of 7.0? (Assume Ka = 6.2 x 10-10 for HCN.)

A. 0.0034 g
B. 11 g
C. 160 g
D. 24 g
E. 0.15 g

2007-10-17 10:40:54 · 1 answers · asked by ChemChic 1 in Chemistry

36 degrees in celcius ( c) how much would it be in farhienhiet (f) please answer this question!!!

2007-10-17 10:40:25 · 3 answers · asked by Anonymous in Physics

and why...

2007-10-17 10:39:35 · 4 answers · asked by . 4 in Mathematics

A 6.6 kg mass on a frictionless inclined sur-
face is connected to a 2.4 kg mass. The pulley
is massless and frictionless, and the connect-
ing string is massless and does not stretch.
The 2.4 kg mass is acted upon by an upward
force of 5.6 N, and thus has a downward ac-
celeration of only 4.5 m/s2 .
The acceleration of gravity is 9.8 m/s2 .
What is the tension in the connecting
string? Answer in units of N.

2007-10-17 10:38:50 · 2 answers · asked by PhysicsDumbass 1 in Physics

2007-10-17 10:37:51 · 4 answers · asked by jenna28336 1 in Mathematics

60kg crate rests on level floor. coefficients of static and kinetic friction are .760 and .410 respectively. What horizontal pushing force is required to (a) just start the crate moving (b) slide the crate across the dock at a constant speed?

For this one I got (a) = 429 N and (b)=226N
?

Is a net force being applied to an object when the object is moving downward
(a) with a constant acceleration of 9.8m/s^2
(b) with a constant velocity of 9.8 m/s^2?
Reasoning?

Stack of books 165Newtons are placed on a scale in an elevator. scalre reads 165N. can u tell from this info whether the elevator is moving with constant velocity of 2m/s upward or 2m/s downward or whether the elevator is at rest? explain

2007-10-17 10:36:10 · 1 answers · asked by Anonymous in Physics

How old are glaciers? It can be any specific glacier on earth. please cite your sources also, thanks :)

2007-10-17 10:36:08 · 3 answers · asked by Joseph K 1 in Earth Sciences & Geology

when concorde used to fly from london to new york it arrived (US time) slightly before it left (UK time), so if you kept heading westward at that speed, wouldn't you be going backward in time, especially when you fly over the international dateline and go back a day? assuming the fuel supply is limitless of course.......

2007-10-17 10:36:07 · 10 answers · asked by tina k 3 in Physics

A 90.0 L stainless steel container was charged with 4.00 atm of hydrogen gas and 5.00 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at a constant temperature of 25°C?

2007-10-17 10:35:54 · 1 answers · asked by Anonymous in Chemistry

2007-10-17 10:35:20 · 2 answers · asked by bristo75 1 in Physics