Science & Mathematics - 19 October 2007

2007-10-19 14:10:26 · 4 answers · asked by Anonymous in Chemistry

2007-10-19 14:08:31 · 2 answers · asked by tmb82 2 in Chemistry

There's no wind on the moon right??? Why is it that the flag is like pointing straight up??
what do u think?
be free to show ur opinion...
oh and here's the url in case u want a second look....

http://www.outerspacepix.com/images/270_flag_salute.jpg

2007-10-19 14:07:35 · 11 answers · asked by anonymous123455555 2 in Astronomy & Space

I'm stuck on this Hw problem:

Find the magnitude and the direction of the velocity for each of the following sets of velocity components

1.) vx = -5 m/s and vy = -7 m/s

I got that it's 8.6 m/s at and im not sure the ________ degree from (the positive x axis)_

2007-10-19 14:04:54 · 3 answers · asked by Chaz 3 in Physics

not sure how to descibe what they "do".

2007-10-19 14:01:53 · 4 answers · asked by Michelle D 1 in Weather

A 3-digit number, when rounded off to the nearest ten and the nearest hundred, gives 1000. what is the greatest possible value of this number?

2007-10-19 14:00:52 · 7 answers · asked by mong 3 in Mathematics

Can someone help me with this problem?

Using the Power Rule, show that the slope of the graph y = sqrt(x) at any point x is NOT halfway between the slope of the forward secant on [x, x + h] and the slope of the backward secant on [x−h, x].

2007-10-19 13:54:12 · 1 answers · asked by Avi J 1 in Mathematics

A shell is fired from the ground with an initial speed of 1.54* 10^3 m/s at an initial angle of 53° to the horizontal.

(a) Neglecting air resistance, find the shell's horizontal range.

(b) Find the amount of time the shell is in motion.

2007-10-19 13:51:51 · 1 answers · asked by Anonymous in Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 16 m/s. The cliff is h = 36 m above the water's surface.

(a) How long does it take for the stone to fall to the water?

(b) With what speed does it strike the water?

2007-10-19 13:50:59 · 1 answers · asked by Anonymous in Physics

1. -sqrt[]3
2. -2
3. -1/2
4. -sqrt[]3/3

2007-10-19 13:49:46 · 1 answers · asked by nevapullout 1 in Mathematics

1. -10/3
2. sqrt[]3/2
3. -1/2
4. -sqrt[]3/2

2007-10-19 13:45:28 · 1 answers · asked by nevapullout 1 in Mathematics

If I have one with 35 families and one with 16..would the species richness just be the number of families?

2007-10-19 13:36:32 · 2 answers · asked by thatsme:) 1 in Zoology

2007-10-19 13:36:30 · 8 answers · asked by wassuped 1 in Mathematics

2007-10-19 13:34:38 · 17 answers · asked by 42 2 in Mathematics

1. sqrt[]3/3
2. -sqrt[]3/2
3. 5/12
4. 1/2

2007-10-19 13:30:52 · 1 answers · asked by dilljam1977 1 in Mathematics

2007-10-19 13:29:23 · 3 answers · asked by Katherine T 1 in Mathematics

1. -sqrt[]3
2.-1/2
3. -sqrt[]3/2
4. -2

2007-10-19 13:28:10 · 2 answers · asked by dilljam1977 1 in Mathematics

2007-10-19 13:26:03 · 26 answers · asked by Anonymous in Geography

Solve for x: Log10^7= Log10^x - Log10^2

2007-10-19 13:25:48 · 4 answers · asked by Anonymous in Mathematics

if the line joining p1(2,3) andp2(7,9) is perpindicular to the line joining q1(8,k) and q2(2,4) find the value of k. how do u find the answer and what is the answer.....thank u very much

2007-10-19 13:22:06 · 2 answers · asked by Anonymous in Mathematics

2007-10-19 13:19:29 · 2 answers · asked by ThaLea 1 in Physics

1a. A dragster and driver together have mass
930.6 kg. The dragster, starting from rest,
attains a speed of 26 m/s in 0.61 s .
Find the average acceleration of the drag-
ster during this time interval. Answer in units
of m/s2.
1b. What is the size of the average force on the
dragster during this time interval? Answer in
units of N.
1c. Assume: The driver has a mass of 71.5 kg :
What horizontal force does the seat exert
on the driver? Answer in units of N.

2007-10-19 13:19:13 · 2 answers · asked by imigeofinvsible 1 in Physics

I was wondering if their was a medical breakthrough that had a conquest and compromise.

2007-10-19 13:17:39 · 1 answers · asked by ;) 3 in Medicine

i am in an 8th grade physics class and i have a science fair project due. i wanted to calculate the kinetic friction of ice but after further research, i found out that this might be harder than i anticipated. can anyone put this in a simple explanation for me?

2007-10-19 13:15:34 · 2 answers · asked by Anonymous in Physics

greenland was once "GREEN". why?

2007-10-19 13:03:20 · 5 answers · asked by charbatch 3 in Earth Sciences & Geology

2007-10-19 13:02:44 · 4 answers · asked by hatguy 2 in Botany

2007-10-19 12:57:52 · 5 answers · asked by Anonymous in Geography

i had a test and we had these questions i dont think i got it right so can someone plz explain this problem how to solve it step by step.thank you

1a) The force of a friction acting on a sliding crate is 155N.
how much force must be applied to maintain a constant velocity?answer in units of N.

b)what will be the net force acting on the crate?answer in units of N.

2)a race car travels along a raceway at a constant Velocity of 200km/h.
what is the net force acting on the car.

2007-10-19 12:56:42 · 2 answers · asked by Lve_SRK 1 in Physics

water is an excellent conducter of heat?
the inside of the paper is wet?
paper is a poor conducter of heat?
the paper cup cannot become appreciably hotter than the water it contains.

2007-10-19 12:54:59 · 9 answers · asked by Anonymous in Chemistry

a. lack cell structure
b. cannot be seen w/out a microscope
c. contain genetic material
d. cause human disease
e. lack a nucleus

Please cite sources.
Thanks so much!

2007-10-19 12:47:20 · 3 answers · asked by ms.curious 2 in Biology