Science & Mathematics - 17 September 2007

A car that weighs 12700.0 N is initially moving at a speed of 35.0 km/hr when the brakes are applied and the car is brought to a stop in 4.8 s. Find the magnitude of the force that stops the car, assuming it is constant.
I found the magnitude to be 2.62 X 10^3 N and now it's asking for the distance the car moved?

2007-09-17 16:02:46 · 1 answers · asked by Anonymous in Physics

A worker drops a wrench from the top of a tower 80 m tall. What is the velocity when the wrench strikes the ground?

2007-09-17 16:02:33 · 2 answers · asked by strawberry 7 2 in Physics

Or better yet where is it and when was the eruption????

2007-09-17 16:01:00 · 8 answers · asked by ? 3 in Earth Sciences & Geology

The measure of interior amd exterior angles of a regular 10-gon? Is the formula 180(n-2) ?

2007-09-17 15:59:33 · 5 answers · asked by Serena 2 in Mathematics

a car traveling at 87 km/h and a bus leave a tollbooth at the same time. twenty minutes later, the bus is 3 km farther from the tollbooth than the car.

2007-09-17 15:58:08 · 3 answers · asked by Chipee 1 in Mathematics

We're analyzing a sample of impure sodium carbonate, Na2CO3. I need to calculate the amount of it I need to react with about 25mL of approximately 0.1M HCl.
I know it's a simple question, but I've forgotten and can't figure it out.
I know i can obtain the Molar Mass of Na2CO3, but what would I do with that? And do I need the molarity1*volume1 = molarity 2 * volume 2 formula? or something like that. I don't know how to combine it all to figure it out.
Any help would be greatly appreciated!

2007-09-17 15:55:44 · 3 answers · asked by Sparkle 1 in Chemistry

AB=12
AD=20
angle A=30
I don't know how to set this problem up.

2007-09-17 15:52:51 · 8 answers · asked by Jen 4 in Mathematics

What is the equation of the tangent line to f(x) = x² - 1 at the point (-2, 3)?

2007-09-17 15:52:17 · 4 answers · asked by Anonymous in Mathematics

A. Solve the sequence formula Tn= 4n2 for n.
B. what term of the sequence is 196

-------------------------------------------------------------------------
tn=1000-3(n-1)

A. find n when tn= 850
B. which term of the sequence is 850?

2007-09-17 15:51:39 · 1 answers · asked by moviefan254 1 in Chemistry

How many grams of CuSO4 * 5H20 are needed to prepare 100 mL of a .10 M solution?

2007-09-17 15:48:13 · 2 answers · asked by moviefan254 1 in Chemistry

An object has an initial velocity of magnitude of 15 m/s to 30° north of east. It is subjected to the forces:
F(1) = 20 N(newtons), 40° south of east.
F(2) = 80 N, 20° west of north.

Motion is detected by adding the force vectors and finding the Net Force. The Accel is the net force vector divided by the objects mass (2 kg).
After 4 seconds find:
A. magnitude of displacement. |x|
B. direction of displacement.
C. magnitude of velocity.
D. direction of velocity.

2007-09-17 15:46:57 · 1 answers · asked by johnnyboy 2 in Physics

My mother had a stroke due to chemotherapy...shortly after her boyfriend, who happens to be a Dr., but not one related to the fields she was treated,started taking her prescriptions from her telling her he would fill them, but instead would take them home and change them on his own prescription pad.

2007-09-17 15:43:26 · 9 answers · asked by zizzy 2 in Medicine

i never seem to get these correct:
42-7y=-3y-6

it seems sooo easy but i can't get the right answer. can someone explain it to me? ty

2007-09-17 15:42:15 · 12 answers · asked by imaaweird0h 1 in Mathematics

A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 18.0 m/s from a height of 4.0 m.
(a) How high does the ball rise from its original position?
m

2007-09-17 15:41:40 · 3 answers · asked by Anonymous in Physics

A pedestrian moves 4.4 km east and then 7.8 km north.
Find the magnitude of the resultant displacement vector. Answer in units of km

Part 2 of the question
What is the direction of the displacement vector (using the counter-clockwise angular direction to be positive, within the limits of -180° to +180°)? Answer in units of ° .

can you please explain how you got the answer, thanks best answer 10 points!

2007-09-17 15:41:39 · 1 answers · asked by Spoken_Truth 3 in Physics

What gas if formed when lighting a match on top of the combination of alka-seltzer and water.

2007-09-17 15:40:44 · 1 answers · asked by iMarty 4 in Chemistry

Functions question - do they end up with the same answer or is there a different way they're done?

2007-09-17 15:39:09 · 7 answers · asked by Bo 3 in Mathematics

Can a regular person get some, and if so how much is it?

2007-09-17 15:38:15 · 2 answers · asked by Anonymous in Chemistry

2007-09-17 15:38:08 · 4 answers · asked by VICKI K 1 in Mathematics

2007-09-17 15:36:10 · 4 answers · asked by adambrodylover99 1 in Earth Sciences & Geology

Can you please explain it too...
Find three consecutive odd integers such that the sum of the first, two times the second, and three times the third is 82.

2007-09-17 15:34:51 · 7 answers · asked by Anonymous in Mathematics

What is the wind speed of the Tropical Storm Ingrid?
What are the locations of this Tropical Storm?
Where is it heading?
What damages has it caused?
What are the possible strikes?

2007-09-17 15:32:37 · 5 answers · asked by osa 1 in Weather

Why are the outer-most electrons the only ones included in the orbital filling diagram and the electron dot diagram?

2007-09-17 15:31:04 · 3 answers · asked by IN0C3NT 2 in Chemistry

k is km/h/s an acceptable unit to measure acceleration???? That's all i need to know

2007-09-17 15:30:24 · 5 answers · asked by Anomaly 4 in Physics

What is the value of c in a vacuum? Give the numerical value as well as the definition.




If a blue light has a wavelength of 550 x 10-9 (550 nanometers), what is the frequency of the light?

5.45 x 10 14
3.568 E -7
5.5 x 10 -7
2.99 x 10 8



As you move from the blue region of the electromagnetic spectrum to the red region of the electromagnetic spectrum, what happens to the wavelengths of the light?

decreases
increases
stays the same



As you move from the blue region of the electromagnetic spectrum to the red region of the electromagnetic spectrum, what happens to the frequency of the light?

decreases
increases
stays the same



Is the frequency of radiation used in a microwave oven higher or lower than that of your favorite FM radio station broadcasting at 91.7 x 106 Hz?

Higher
Lower

2007-09-17 15:29:31 · 1 answers · asked by kyle p 1 in Chemistry

if the big bang did happen
wouldn't it just be easier if people would believe that something supernatural possibly could have put the material there for it to happen?

2007-09-17 15:27:57 · 16 answers · asked by shooting doctor 4 in Astronomy & Space

2007-09-17 15:27:45 · 12 answers · asked by Konrad 6 in Chemistry

2007-09-17 15:27:32 · 5 answers · asked by Shepard S 1 in Mathematics

2007-09-17 15:26:32 · 3 answers · asked by darkliquid_dreams 2 in Geography

What is the maximum number of orbitals that can be identified with the following quantum numbers: n = 5, l = 3?

How do I figure this question out? I am not sure..?

2007-09-17 15:26:18 · 1 answers · asked by *-whitz-* 4 in Chemistry