Science & Mathematics - 27 January 2007

A cyclist Amoves with a speed 3.0 m/s to the left(with respect to the road). A second cyclist, B, moves on the same straight-line path as A with a relative velocity of 1.0 m/s with respect to A. What is the velocity of B with respect to the road. And a third cyclist has a relative velocity with respect to A of -2.0m/s. Whatis the velocity of C with respect to the road?

*What does it mean when it says "What is the velocity of B with RESPECT TO THE ROAD" and "A third cyclist has a RELATIVE VELOCITY WITH RESPECT TO A OF -2.0 m/s. WHAT IS THE VELOCITY OF C WITH RESPECT TO THE ROAD", specifically the capatilized parts

And also how do you solve the questions

2007-01-27 15:25:42 · 3 answers · asked by bob c 2 in Physics

2007-01-27 15:25:25 · 8 answers · asked by VDESH 1 in Engineering

2007-01-27 15:24:16 · 4 answers · asked by Anonymous in Physics

2007-01-27 15:24:10 · 6 answers · asked by choco taco 3 in Zoology

How does the slingshot effect work to gain speed? I understand how a body's gravity will accelerate a craft on approach, but won't it take away just as much momentum on departure?

2007-01-27 15:22:34 · 8 answers · asked by Anonymous in Astronomy & Space

2007-01-27 15:21:25 · 5 answers · asked by classic_vintage20 1 in Physics

2007-01-27 15:21:13 · 2 answers · asked by Anonymous in Astronomy & Space

Hi,
I have this eqn for normal distribution:
http://img148.imageshack.us/img148/5906/mathxj4.gif
I need to integrate this and then form a function which inputs x and outputs the value of a i.e. f(x) = a NOT f(a)=x
Thanks.

2007-01-27 15:21:09 · 2 answers · asked by HellBoy 2 in Mathematics

What is if it's left alone on the terrace for 6 days?

2007-01-27 15:20:34 · 3 answers · asked by dizzyboy 2 in Biology

A will states that John is to get 3 times as much money as Mary. The toatl amount they will receive is $11,000.

a. write a system of equations representing this situation

b. solve to find the amounts of money John and Mary will get

2007-01-27 15:19:35 · 11 answers · asked by jenjen 3 in Mathematics

There are 46 chromosomes in humans and 48 in apes.

2007-01-27 15:19:23 · 2 answers · asked by Anonymous in Biology

Choose the the compound with the greatest positional entropy in each case.

a. 1 mol H2 (at STP) or 1 mol H2 (at 100 degrees C, 0.5 atm)

b. 1 mol N2 (at STP) or 1 mol N2 (at 100 K, 2.0 atm)

c. 1 mol H20 (s) (at 0 degrees C) or 1 mol H2O(l) (at 20 degrees C)


How do you know which has a greater positional entropy? Is there a way to determine this?

Help me please!

2007-01-27 15:19:12 · 4 answers · asked by laweezer08 1 in Chemistry

2007-01-27 15:18:43 · 9 answers · asked by Daqwon wifey 1 in Weather

2007-01-27 15:18:09 · 3 answers · asked by Ruyi L 1 in Botany

a noisy machine in a factory produces a decibel rating of 80dB. How many identical machines could you add to the factory without exceeding the 90dB limit set by federal regulations?

2007-01-27 15:16:10 · 1 answers · asked by Jackie 2 in Physics

2007-01-27 15:14:57 · 3 answers · asked by Esther L 1 in Earth Sciences & Geology

i have them on my feet but my brother has more than me. also he has popping veins on his hands. they are really cool. so what it is makes them come out of your body?

2007-01-27 15:14:36 · 5 answers · asked by phatso 4 in Biology

what would happen if there is an excess of acid or alkali?

2007-01-27 15:12:25 · 1 answers · asked by thomasian 2 in Chemistry

Taking into account the heat of combustion for octane (and its equation):

C8H18(l) + 25/2 O2(g) --> 8CO2(g) + 9H2O(g) ΔH= -5472

And, the heat of combustion for the following reactions:

H2(g) + 1/2 O2(g) --> H2O(g) ΔH= -242 kJ

8C(s) + 9H2(g) --> C8H18 ΔH= ?

C(s) + O2(g) --> CO2(g) ΔH= -394 kJ

Thanks in advance for your help!

2007-01-27 15:08:49 · 1 answers · asked by Random G 3 in Chemistry

2007-01-27 15:08:16 · 9 answers · asked by J o h n 3 in Medicine

I had to do a math activity in school, and I'm looking for the name of the manipulatives. There are 10 pieces. I think they are shaped in hexagons. You would connect the lines to make a shape. You would start with one, two, and three. Then go to one, two, three, and four, and so on. The colors of the lines were red, blue, and yellow. Plz help if you know what they are called!!!

2007-01-27 15:08:11 · 1 answers · asked by marshall123456@sbcglobal.net 2 in Mathematics

2007-01-27 15:07:40 · 1 answers · asked by Anonymous in Mathematics

Cherelle earned $240 in the summer by working at a fast food restaurant and baby-sitting. If she earned five times as much in the restaurant as she did babysitting, how much did she earn at each job?

a. If cherelle earned x dollars babysittitng how much did she earn at the restaurant?

b. Write a system of equations and solve the system to determine the amount she earned babysitting and at the restaurant

2007-01-27 15:04:23 · 5 answers · asked by jenjen 3 in Mathematics

A family were about to make a 18,000 mile trip,their tires were checked and were good for only12,000 miles each.

2007-01-27 15:02:18 · 3 answers · asked by jacjfrost 1 in Mathematics

2007-01-27 14:53:45 · 1 answers · asked by ? 1 in Chemistry

I have calculated the distance from the Equator to the satellite to be 35,848 km. I know that the radius of the Earth is 6,378 km. Using the Pythagorean Theorem, I calculated a hypotenuse of 36,411 km.

But I am asked to determine above and below which latitudes the satellite cannot see, and this is where I'm stuck. When I solve for the angle using trig identities, I get 10 degrees...which obviously isn't correct.

Does anybody have any suggestions? Thank you!!!

2007-01-27 14:52:46 · 5 answers · asked by JoeSchmo5819 4 in Astronomy & Space

What's the total number of human beings that existed on the face of Earth since the beginning of time?!! Approximately of course :)

2007-01-27 14:46:57 · 8 answers · asked by Anonymous in Other - Science

Some interesting plans for colonization or perhaps better faster propulsion that costs less money, any cool space visions would be awesome to hear about.

2007-01-27 14:44:45 · 13 answers · asked by Anonymous in Astronomy & Space

I have an interesting math teacher that is obsessed with homework, and I need some help!
What are these polygons, and can you use logic and describe them to me?

1.) It is a closed figure with straight sides.
2.) It has sides of two different lengths
3.) One of its angles measures 135 degrees.
4.) Another of its angles is congruent to the angle in clue 3
5.) The angles in clues 3 and 4 are not consecutive angles
6.) Its other angles are larger than acute but smaller than obtuse
7.) It has two sides that are parallel
8.) It has ten pairs of angles

Next.....
1.) It is a polygon
2.) Some of its angles measure 120 degrees
3.) Its other angles measure 150 degrees
4.) Its sides aren't congruent
5.) It has an even number of both measures of angles
6.) Its smaller angles are consecutive angles
7.) It ahs more of the larger angles than the smaller
8.) It has 45 pairs of angles.
Thank You SOOOO... Much!!!!~~~~~

2007-01-27 14:44:00 · 7 answers · asked by Anonymous 2 in Mathematics

2007-01-27 14:43:56 · 14 answers · asked by Anonymous in Physics