Science & Mathematics - 30 January 2007

i have a few problems left and i need some help with them:
1.) The following forces act on an object resting on a level, frictionless surface. 10 N to the north, 20 N to the east, 10 N at an angle 40 degrees south of east, and 20 N at an angle 50 degrees west of south. Find the magnitude and direction of the resultant force acting on the object.
2.)The following horizontal forces act on an object: A.) has a magnitude of 6.0 N and is in the + y direction; B.) has a magnitude of 10.0 N and is in the - x direction; C.) has a magnitude of 8.0 N and is at an angle of 45 degrees clockwise from hte + x direction. Find the magnitude and direction of A + B - C.
3.) The vector A has a magnitude of 10 cm and points 37 degrees clockwise from the + y direction. The vector B has a magnitude of 10 cm and points 37 degrees clockwise from the + x direction. Find the magnitude and direction of A + B, A - B, and B - A.

2007-01-30 17:04:28 · 1 answers · asked by Anonymous in Physics

Two ropes are attached to the screw eye hook in this picture. Rope B is being pulled with a force of 100N at an angle of 15 degrees to the y-axis. Rope A is being pulled with a force of 50 N at an angle of 20 degrees to the x-axis. Find the x and y components of the resultant force, F


I can't figure it out

2007-01-30 17:04:28 · 2 answers · asked by devilmaycry42 2 in Physics

1. p^4+5p^2+6
2.15r^2-16rt+4t^2

2007-01-30 17:03:45 · 6 answers · asked by Anonymous in Mathematics

∫ cos 2πt δ(t-2) dt evaluate from 5 to 10

I have no idea how to do this. Please explain

2007-01-30 17:01:18 · 2 answers · asked by Anonymous in Mathematics

but that isn't the case. It also would seem like the ocean would dump out.

2007-01-30 17:00:48 · 5 answers · asked by thekingisback 3 in Earth Sciences & Geology

Can cylinders be considered as polyhedrons for applying the Euler's formula, V-E+F=2 (V: vertices, E: edges, F: faces)? If so, what are the values of V, E and F?

2007-01-30 16:59:47 · 5 answers · asked by Sourabh 3 in Mathematics

Please dont give me tips on how to get the answer just give me every four digit combination if you have it.

2007-01-30 16:58:54 · 4 answers · asked by chris b 1 in Mathematics

???

2007-01-30 16:58:37 · 3 answers · asked by Tan Boon Hwee k 2 in Engineering

find 3 consecutive integers such that the sum of the first and the third is 146. (please tell me when im gonna need this lol honestly.) and thanks to those that have helped me with this i desperatly need help in math cuase i really suck big time.

2007-01-30 16:54:46 · 4 answers · asked by Anonymous in Mathematics

suppose n is positive integer.
Determine, with poof, all possible values of gcd(8n+20, 5n+13).
Be sure to also show by example that each of these values is possible..


help me please..

2007-01-30 16:53:59 · 1 answers · asked by Anonymous in Mathematics

five times a number is 21 less than twice the opposite of the number. What is the nunber?

ok is it something like 5x>21-? thats what im stuck on the opposite of the number i dont get it.. =*[

2007-01-30 16:52:47 · 5 answers · asked by Anonymous in Mathematics

The surface of the cube is to be goldplated. If the length of 1 edge of the cube is 10 inches, use differentials to approximate the volume of gold to be used if the plating is 0.001 inches thick.

2007-01-30 16:50:14 · 2 answers · asked by Sammy Baby 1 in Mathematics

2007-01-30 16:50:10 · 20 answers · asked by jan 1 in Biology

Differentiate this f(t)= 2t/(4+t^2)

do we use product rule and quotient rule or how???

2007-01-30 16:46:35 · 5 answers · asked by Anonymous in Mathematics

y=x^2+2x-35
and y=x^2-4
can someone please help me!

2007-01-30 16:45:03 · 7 answers · asked by Judas Rabbi's daughter. 2 in Mathematics

2007-01-30 16:43:22 · 1 answers · asked by very sad 1 in Medicine

2007-01-30 16:40:06 · 1 answers · asked by MR.CARDONA 1 in Engineering

How does temperature (proportional to average speed of the molecules) affect the pressure? Compare samples in the same size container at the two differnt speeds.

Any info would be of great help. Thanks to all of you ahead of time

2007-01-30 16:39:31 · 4 answers · asked by Anonymous in Chemistry

2007-01-30 16:36:12 · 2 answers · asked by Johnny 1 in Engineering

2007-01-30 16:35:57 · 4 answers · asked by Duy T 1 in Mathematics

2007-01-30 16:34:54 · 2 answers · asked by Anonymous in Biology

2007-01-30 16:34:36 · 5 answers · asked by Anonymous in Weather

A laboratory created ,man made or cultured diamonds are not called "DIAMONDS" only without any of the title adding to DIAMONDS.

2007-01-30 16:34:00 · 3 answers · asked by Divyesh shah 1 in Earth Sciences & Geology

if the sum of twice a number and -14 is multiplied by 2, the result is 12 greater than the opposite of the number. What is the number?

2007-01-30 16:33:55 · 3 answers · asked by Anonymous in Mathematics

Anybody know the awnser to this?

lim x--> -3

2- squareroot(x^2-5) / x+3

THANKS

2007-01-30 16:33:41 · 4 answers · asked by Anonymous in Mathematics

2007-01-30 16:33:18 · 6 answers · asked by banti 1 in Astronomy & Space

please tell every thing you know i have to know a lot about it

2007-01-30 16:33:14 · 4 answers · asked by pashi 2 in Geography

What is the basic theory?
How many G could be generated?

2007-01-30 16:32:29 · 4 answers · asked by Anonymous in Physics

2007-01-30 16:30:21 · 6 answers · asked by ZORRO 3 in Biology

2007-01-30 16:29:26 · 6 answers · asked by dinky 2 in Mathematics