Science & Mathematics - 26 November 2007

Write the following compound statement in symbolic form

Let p : Today is Monday
q: Tomorrow is the day Sara leaves

If tomorrow is not the day Sara leaves, then today is Monday

2007-11-26 12:03:18 · 3 answers · asked by donna g 1 in Mathematics

2007-11-26 12:02:17 · 2 answers · asked by ? 4 in Weather

a. topography
b. its A horizon
c. the parent material
d.its B horizon

2007-11-26 12:01:37 · 3 answers · asked by Anonymous in Earth Sciences & Geology

perpendicular to y=2x-1 and goes through (6,4)

slope intercept form?________

i need step by step help please! thnx

2007-11-26 12:01:21 · 2 answers · asked by love and peace 1 in Mathematics

Using four cuts, what is the greatest number of pieces of pizza you can get? The cuts have to be straight from edge to edge.

(The answer is not 8.)
Good Luck!

2007-11-26 12:00:40 · 6 answers · asked by Anonymous in Mathematics

=/

?

2007-11-26 11:58:37 · 4 answers · asked by Jeanette50 1 in Earth Sciences & Geology

A 13 kg crate is pulled by a force (parallel to the incline) up a rough incline. The crate has an initial speed of 1.69 m/s. The crate is pulled a distance of 7.41 m on the incline by a 150 N force. The coefficient of friction is 0.328. The acceleration of gravity is 9.8 m/s^2.

(Please help I haven't had any luck with this problem.)

2007-11-26 11:54:15 · 2 answers · asked by margarita_9902@sbcglobal.net 2 in Physics

Find the equation of the parabola with focus (8, 10), and vertex (8, 6)

2007-11-26 11:53:01 · 1 answers · asked by confusedkid 3 in Mathematics

2007-11-26 11:49:02 · 1 answers · asked by Anonymous in Botany

2007-11-26 11:46:04 · 3 answers · asked by Anonymous in Mathematics

ok i have a few patterns im having trouble understanding or putting IN words,can u plz explain how u got it and I need to have a pattern rule for the followng!

Write the next three numbers
#1 1,0.5,0.25,0.125...
#2 1,5,25,125...
#3 2187,729,243,81
#4 The pattern rule for a sequence is start with 1,double
each number and subtract 1.What is the 250th number
in the pattern?How do you know?
#5 1,1,2,6,24,120

THANKS!

2007-11-26 11:45:44 · 2 answers · asked by Natty 2 in Mathematics

What are the characteristics of all fractals?

2007-11-26 11:45:09 · 2 answers · asked by ♥TheBeatlesBiggestFan♥ 5 in Mathematics

how many seconds will a ball take to reach a height of 200 ft?

h = -16x^2 + 28 x +144

h = height and x = time ( second )

I know that I have to plug in 200 into h and solve for x
but I just can't get an answer... can anyone help me with this?

2007-11-26 11:45:01 · 4 answers · asked by melong_91 1 in Mathematics

A glass ball is immersed into a fluid at two different temperatures t 1 =17 degrees C and t 2 = 20 degrees C. At t1 the ball displaces the mass of fluid m 1 = 30.10 g and at t 2, m 2 = 30.01 g. Calculate the difference between the coefficient of volume thermal expansion of the fluid and the corresponding coefficient for glass.
Give your answer with 3 sig. fig. in scientific notation.

2007-11-26 11:43:09 · 1 answers · asked by Anonymous in Physics

2007-11-26 11:43:04 · 1 answers · asked by Dana C 1 in Chemistry

2007-11-26 11:41:23 · 2 answers · asked by ? 4 in Weather

I don't remember A LOT about limits with trig. functions. We're reviewing and I'm having so much trouble.

We haven't done L'Hopital's rule, so please don't suggest it. People have tried to help me solve it this way but I just cannot understand it. There needs to be another way to solve these limits.

Please, please help me out?

There are questions like:

Lim x-->0 (tan πx/ x)
Lim x---> infinity (x^2 sin(1/x)
lim x--> 0 (x csc x)

Do I use the quotient rule? Or...? I'm so confused!

Please help me. My HW is due tomorrow and I'm desperate for help!

Thank you SO much!

2007-11-26 11:40:15 · 4 answers · asked by Anonymous in Mathematics

Is it because they are still searching for someone to prove to them the existence of the paranormal?
Or do they just like wasting time telling everyone that they are wrong or hallucinating when they share personal stories?

If you don't believe, then fine. But why waste your time with those who do believe if you think they are so wrong?

Aha! Got ya there! :)

2007-11-26 11:38:26 · 26 answers · asked by Anonymous in Paranormal Phenomena

Or both/either..?

2007-11-26 11:37:32 · 3 answers · asked by pushplay30 3 in Earth Sciences & Geology

2007-11-26 11:36:30 · 4 answers · asked by Anonymous in Engineering

In triangle ABC, suppose that angle C is twice angle A. Show that

ab = c² - a²

A, B, and C are the angles and a, b, and c are the lengths of the corresponding sides.

2007-11-26 11:35:36 · 2 answers · asked by Northstar 7 in Mathematics

Its for my home work and alsowhy?
Do you think has always looked like it has now?why?
What are forces of erosion that are wearing awayat Earth?Why doesnt eart erode all the way?

2007-11-26 11:34:46 · 8 answers · asked by (:Taylor_Pattinson :) 2 in Earth Sciences & Geology

A motorcycle has a constant speed of 25m/s as it passes over the top of a hill whose radius of curvature is 126m. The mass of the motorcycle and driver is 342kg. Find the magnitude of
(a) The centripetal force
(b)the normal force that acts on the cycle

A motorcycle is traveling up the sude of a hill and down the other side. the crest is a circular arc with a radius of 45m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.

Thank You!

2007-11-26 11:34:31 · 2 answers · asked by Anonymous in Physics

Is a tomato a fruit or vegetable?

2007-11-26 11:33:30 · 6 answers · asked by Anonymous in Botany

2007-11-26 11:33:20 · 6 answers · asked by david w 2 in Biology

I know your heart pumps and the blood gets moved along in veins and arteries and etc, but if the blood is just circulating throughout a tunnel, how does it reach your organs, muscles, etc....

It sounds like a dumb question but they never told us in school throughout the years

2007-11-26 11:28:26 · 5 answers · asked by ? 5 in Biology

I need the equation in differential form for steady state molecular diffusion of a fluid in a laminar flow. I am looking for an equation that will work for Reynold's Number 35. Also is it possible to derive it from Ficks law of mass transfer?

2007-11-26 11:23:53 · 2 answers · asked by Anonymous in Engineering

Write the following compound statement in symbolic form

Let p : Today is Monday
q : Tomorrow is the day Sara leaves
If tomorrow is not the day Sara leaves, then today is Monday

2007-11-26 11:23:29 · 1 answers · asked by donna g 1 in Botany

Background info: A spring oscillates with a weight on it in simple harmonic motion.
This is another physics lab question.... please help!

2007-11-26 11:21:47 · 1 answers · asked by Anonymous in Physics

Hi, I have a particular question and I don't know how to go about it. Your help is appreciated.

Roughly how fast would you have had to move to follow the solar eclipse shadow in Europe in 1999?
Diameter (Sun)= 1.392*10^6km
Diameter (Moon)= 3476km
Diameter (Earth)= 12756km
Distance (Sun-Earth)= 1.5*10^8km
distance (Moon-Earth)= 384402km

2007-11-26 11:19:59 · 2 answers · asked by Anonymous in Astronomy & Space