Science & Mathematics - 8 October 2006

A car is driven at a constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is 0. The driver's mass is 70.0 kg. What is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley?

The answer is 1.37 x 10 ^3 N, but I am not sure how to get that answer.

2006-10-08 10:41:12 · 1 answers · asked by afchica101 1 in Physics

2006-10-08 10:41:11 · 2 answers · asked by Stanleymonkey 2 in Mathematics

2006-10-08 10:40:59 · 5 answers · asked by Anonymous in Physics

2006-10-08 10:39:13 · 5 answers · asked by thezo91 1 in Mathematics

2006-10-08 10:38:42 · 4 answers · asked by ♥Paula♥ 1 in Chemistry

how do you find the range of the problems f(x)=(x-3)/x and f(x)=square root of (3-x)

2006-10-08 10:35:32 · 2 answers · asked by i heart fashion 2 in Mathematics

If length of a position vector for an object is constant, then the position vector must be perpendicular to the velcocity vector.

Can you prove this using the dot product?
Umm.... ???

2006-10-08 10:33:18 · 3 answers · asked by Anonymous in Mathematics

The house is 1500 Square feet.

2006-10-08 10:31:54 · 4 answers · asked by bran 5 in Mathematics

The acceleration of a particle on a horizontal xy plane is given by
a = 3tiˆ + 4tˆj , where a is in metres per second-squared and t is in seconds. At t = 0, the
particle has the position vector r = (20.0 m)iˆ + (40.0 m) ˆj and the velocity vector
v = 5.00 m/s iˆ + 2.00 m/s ˆ r . At t = 4.00 s, what are (a) its position vector in unit-vector
notation and (b) the angle between its direction of travel and the positive direction of the x axis

2006-10-08 10:28:57 · 1 answers · asked by Galaxy D 2 in Physics

haha, Just wondering, if people who are attacked by sharks see it first and try to get away, or taken completely by shock.

2006-10-08 10:28:30 · 8 answers · asked by janiewq 2 in Zoology

Okay, I am doing this for my science class. We are doing the scientific method and I wanted to know which eye color is most likely to have glasses. If you would please, If you know a friend that wears glasses, can you tell me what his/her eye color is? that would be great, thanks! I would post my conclusion after I get an appropriate amount of answers.

2006-10-08 10:27:52 · 10 answers · asked by Anonymous in Other - Science

Experianced amateur but out of it for a few yrs- have had dobs n Eq's -I love drawing jupiter- still have a 6 in f10 dob that needs recoated in basement- also have a 12 in f10 superplanetary optics set that i never built the scope for-
money limeted or i'd get 'em all-

2006-10-08 10:24:11 · 3 answers · asked by scootda2nd 2 in Astronomy & Space

About the emotional consciousness of astrophysics, astronomers and nuclear physics about the Nobel Prize, which comes from the disturbance of morally transform their state of being, awake by the feeling of ignorance, which based the interpretation of the powers of the “Grand Atom” Universe mechanism, only founded in the Sun’s reaction, such as: light, mid atomic waves caused by the electrons’ ups and downs inside the atom, not considering the complete mechanism of the Universe: Sun (nucleus) interacting with the Interstellar System (finite surroundings) by the power of Planet Earth (center of balance), according to the book to be published by the projector and scientist self-taught person Tarcísio Brito.

2006-10-08 10:19:37 · 4 answers · asked by britotarcisio 6 in Physics

2006-10-08 10:09:01 · 1 answers · asked by Anonymous in Other - Science

NH4Br, the 4 is supposed to be small and in the bottom right corner. I don't get it. How did they get those letters and numbers?

2006-10-08 10:07:32 · 8 answers · asked by =)) 3 in Chemistry

2006-10-08 10:05:56 · 5 answers · asked by blue w 1 in Chemistry

first i thought 18!, then i thought 9!²,
now i realize it's less than that....
i'm thinking it's 6^6 ...???

2006-10-08 10:04:59 · 5 answers · asked by Anonymous in Mathematics

a) Astrophysics, astronomers and nuclear physics’: light, mid atomic waves caused by the electrons’ ups and downs inside the atom
b) Tarcísio Brito’s (self-taught scientist): Grand Atom (Universe) divided into three powers: Protons, Electrons and Neutrons. The sun contains the positive power (Protons), but with negative feedback (Electrons) and the Interstellar System contains the negative power (Electrons), but with positive feedback (Protons). Planet Earth is responsible for the Neutrons, acting in order to unbalance positive and negative powers in its limits. Therefore, neutralizes beginning and end. And so energies come from the place where they go to, and go to the place where they came from.

2006-10-08 10:04:03 · 3 answers · asked by britotarcisio 6 in Physics

I am in a tough spot.Step daughter is failing geometry and will not accepy a tutor or help from her mom or me. Is there any special sites or suggestions from you math whizzes! I am desperate! Thank you.

2006-10-08 10:03:50 · 7 answers · asked by John 2 in Mathematics

What do they do?

2006-10-08 10:02:27 · 3 answers · asked by Kedah<3 3 in Biology

over a 30 day period , the anount of propane in a tank that stores propane for heating a home decreases from 400 gallons to 214 gallons . what is the average rate of change in the amount of propance?
a.-6.2 gallons per day
b.-6 gallons per day
c.-0.16 gallons per day
d. 6 gallons per day

2006-10-08 10:00:45 · 14 answers · asked by pearl 2 in Mathematics

Europa, one of the Galilean moons of Jupiter, is always mentioned as a possible site of life. What forms would life on Europa likely take?

2006-10-08 10:00:42 · 11 answers · asked by SenecaD 2 in Astronomy & Space

field of study

2006-10-08 09:55:20 · 9 answers · asked by anouar s 1 in Other - Science

Joe is having a party. He is not a guest at his own party. On the first doorbell ring, 1 guest enters. On the second doorbell ring, 2 more guests enter. On the third ring, 3 more guests enter, and the pattern continues. How many guest are at the party after the 200th ring?

2006-10-08 09:55:06 · 11 answers · asked by jkelly 2 in Mathematics

could you recomend me a good board for gems, eg emeralds, rubies and saphires discujssio9n?

thanks

2006-10-08 09:55:03 · 4 answers · asked by Carlos B 1 in Earth Sciences & Geology

2006-10-08 09:54:41 · 3 answers · asked by wassatexasbeotch 1 in Mathematics

2006-10-08 09:53:14 · 2 answers · asked by crazmonkey2212 1 in Biology

We were wondering whether having a shorter than average menstrual cycle means that you'd get the menopause earlier than if you had a longer cycle, as surely it means that you run out of eggs sooner!

2006-10-08 09:52:41 · 10 answers · asked by Anonymous in Biology

2006-10-08 09:49:59 · 7 answers · asked by racheldawnsmith311 1 in Mathematics

2006-10-08 09:49:04 · 3 answers · asked by racheldawnsmith311 1 in Mathematics