Science & Mathematics - 19 September 2007

For the vectors given in Fig. 3-32 (|A| = 60.0 and = 60.0°), determine the following.

Figure 3-32
http://www.webassign.net/giancoli5/3_35alt.gif

(a) A - B + C
Magnitude:___
Direction:___ ° (counterclockwise from the +x axis is positive)
(b) A + B - C
Magnitude:___
Direction:___ ° (counterclockwise from the +x axis is positive)
(c) C - A - B
Magnitude:___
Direction:___ ° (counterclockwise from the +x axis is positive)

2007-09-19 14:25:20 · 2 answers · asked by t_steckbeck 1 in Physics

2007-09-19 14:24:39 · 2 answers · asked by Michael Vincent C 1 in Earth Sciences & Geology

2007-09-19 14:24:22 · 10 answers · asked by Fsf S 1 in Astronomy & Space

you are trying to buy a dress from a store and then you borrowed two 50 bucks from two of your friends...so its now 100....the price of the dress is 97....and you got the change of 3 bucks....then you gave the your two friends 1.50 bucks.....when you add that all the sum will be 99.50....where did the .50 go??

2007-09-19 14:23:49 · 12 answers · asked by 08franz 2 in Mathematics

2007-09-19 14:21:47 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-19 14:21:35 · 3 answers · asked by Anonymous in Other - Science

2007-09-19 14:20:33 · 5 answers · asked by hanna 1 in Mathematics

if a statement was written like this:

~(p^q)

does that mean "p is not OR q is not."

i don't know if you have to negate the "^" symbol. so if a statement was written like that do you have to negate everything inside the parenthesis?

2007-09-19 14:19:58 · 7 answers · asked by james t 1 in Mathematics

2.2lbs= 1kg
1 ton= 2000lbs

2007-09-19 14:19:18 · 3 answers · asked by Pheobe Halliwell 1 in Mathematics

2007-09-19 14:18:53 · 4 answers · asked by mariana9619 1 in Botany

Would the lack of tides wreak havoc? Any other problems that I'm not anticipating? Just curious if we really need the moon.

2007-09-19 14:17:26 · 12 answers · asked by Vinnie G 1 in Astronomy & Space

Please give examples if possible. Thank you!

2007-09-19 14:16:19 · 5 answers · asked by Sin™ 6 in Zoology

2007-09-19 14:15:11 · 2 answers · asked by susyandhensy 1 in Physics

A sled powered by a rocket engine starts from rest on a frozen lake, accelerates at 13.0 m/s~2 (meters per second squared). At point A, the engine shuts down and sled moves with constant velocity V until point B. The sled travels a total distance of 5.30x10~3 m(5.30 times ten to the third meters) and the total time is 90.0 seconds. Find A, B, and V.

Please, if you can help solve this problem, tell me how you did it, so I can solve other problems like it. Thank you!

2007-09-19 14:14:23 · 2 answers · asked by Rennix 2 in Physics

im sorry but i need some more help. i got the following answers for the problem but i am lost and need help. im getting a tutor tomorow.

for 1 i got undefined and 2 i got 6.7x2-3? please help me in any way possiable, thanks so much!

1. given f9x0=1-2x2, find f(x+ triangle thing x ) -f (x) over triangle thing x, for hear i got undefined

2. f (x) = 3x+1 g(x) = x2 -3, and for hear i got 6.7x2-3. oh my god anyone please guide me or tell me any good websights, is there any way to check my work or what? thanks you so much in advanced i really appricate it:}

2007-09-19 14:13:48 · 2 answers · asked by Anonymous in Mathematics

If a ball is thrown into the air with a velocity of 40 ft/s, its height in feet after t seconds is given by y=40t - 16t^2.
A) Find the average velocity for the time period beginning when t=2 and lasting
1) 0.5 second
2) 0.1 second
3)0.05 second
4)0.01 second
B) Find the instantaneous velocity when t=2

Please help!

2007-09-19 14:13:24 · 5 answers · asked by Anonymous in Mathematics

be serious and lake eerie in canada pleazzz be honest im loking for a breif answer

2007-09-19 14:13:10 · 4 answers · asked by Anonymous in Biology

does the focusofthelightoutweighthedispersion--yes---duh!!--sorry., but can it be used somhow(don't know how to spell sumhow)(at 9 I.q 140 what happd)if inside a beem of luesance l meant light does phisical law still apply---any studys?

2007-09-19 14:11:50 · 2 answers · asked by dantedemitre 2 in Physics

2007-09-19 14:11:34 · 2 answers · asked by Debra C 2 in Mathematics

Evaluate the limit: (15(cos^2)x)/(7-7sinx)=?
This is as x goes to pi/2
Any help/adivce is greatly appreciated! :)

2007-09-19 14:07:27 · 2 answers · asked by spacemonkeys9999 1 in Mathematics

A plane leaves Los Aangelas at 8:00 am for Philadelphia, which is in a different time zone. The plane travels a distance of 2,700 miles. It flies nonstop at an average speed of 540 miles per hour.

Los Angelas Pacific time 8:15
Philadelphia Eastern time 11:15

Explain the steps you would take in order to find the time the plane arrives in Philadelphia.Use words, numbers, and symbols in your explanation.

2007-09-19 14:06:48 · 5 answers · asked by btweet12 1 in Mathematics

5x-18=3x+2

i suck at this help plz

2007-09-19 14:05:50 · 8 answers · asked by Anonymous in Mathematics

Solve each system of equations. If the system has no solution, say that it is inconsistent

{3x - 6y = 2
{5x + 4y = 1

Can you please help with this?

2007-09-19 14:04:36 · 10 answers · asked by w s 3 in Mathematics

1in= 2.54cm
12in= 1ft
1yard=36in
1m= 39.37in

and its supposed to be a 2-step english to metric conversion and are suppossed to use the guessing method (not actually guessing.... its a real method)

2007-09-19 14:04:34 · 9 answers · asked by Pheobe Halliwell 1 in Mathematics

The balloon leaves the thrower's hand with a speed of 6.30 m/s. Air resistance may be ignored, so the water balloon is in free fall after it leaves the thrower's hand.

What is its speed after falling for a time 1.85 s?
How far does it fall in a time of 1.85 s?
What is the magnitude of its velocity after falling a distance 11.3 m?

2007-09-19 14:01:46 · 1 answers · asked by Anonymous in Physics

also, whats a Scanning Electron Microscope?

2007-09-19 13:59:45 · 3 answers · asked by Anonymous in Biology

solve the inequality and express the solutions in terms of intervals.
-2< I x I <4

I know the answer should be (-4, 4) but I don't know how they got that answer. Please help!

2007-09-19 13:58:38 · 4 answers · asked by evie ♥'s her Dodgers 5 in Mathematics

elisa sold 110 tickets for the football game. Each adult ticket costs $2.50 and each student ticket costs $1.10. elisa collected $212. how many of each kind of ticket did she sell? use a guess and check table and write an equation to solve.

2007-09-19 13:57:28 · 6 answers · asked by Anonymous in Mathematics

Please include some examples = )

2007-09-19 13:54:02 · 5 answers · asked by Abiku 6 in Mathematics

2007-09-19 13:53:21 · 18 answers · asked by Anonymous in Astronomy & Space