Science & Mathematics - 9 December 2007

2007-12-09 04:05:50 · 2 answers · asked by mrcoffee 1 in Astronomy & Space

2007-12-09 04:05:17 · 1 answers · asked by bahamahibiscus 1 in Earth Sciences & Geology

waves have phases right?
can someone please tell me what the phases of waves are and a SHORT, SWEEEEET, and SIIMPLE definition of each wave phase?


tank u

2007-12-09 03:58:59 · 5 answers · asked by luvalwayz_divya 1 in Physics

What constitutes differentiablitly of a function at a point? how is it determined analytically at a point?

2007-12-09 03:58:15 · 1 answers · asked by Anonymous in Other - Science

2007-12-09 03:53:00 · 1 answers · asked by vivica 1 in Mathematics

A grinding disc is turning 12900 rpm. The disc has a diameter of 20.0 cm. Calculate the smallest cohesive force holding a 1.00 g bit of grit on the edge of the disc.

minimum Centripetal Force = ________________ N

2007-12-09 03:51:12 · 3 answers · asked by Anonymous in Physics

you can observe white fumes coming out from the upper part inside the cockpit, but they are absolutely dry.

2007-12-09 03:46:28 · 5 answers · asked by Anonymous in Other - Science

What is the derivative of sin(x + (π/2))

Is it: cos (x + (π/2))? Or is there a chainrule involved?

2007-12-09 03:45:47 · 5 answers · asked by Anonymous in Mathematics

I picked two points to hep me find the rate of change of a graph.

3,3
-3,1

What would be the rate of change?

2007-12-09 03:44:17 · 3 answers · asked by Anonymous in Mathematics

How to solve
lim (sinx)^x
x->0+
I know that the limit is 1 but I don't know how to come to it

2007-12-09 03:37:13 · 1 answers · asked by Anonymous in Mathematics

2007-12-09 03:35:51 · 2 answers · asked by Ashh 1 in Mathematics

2007-12-09 03:35:43 · 2 answers · asked by Alana waller 1 in Zoology

log(5) (x-1) + log(5) (x-2) - log(5) (x+6) = 0

**(5) means to the base of 5
** please help step by step
*** the awnser is suposed to be
x=2 + 2 [square root of 2]

2007-12-09 03:35:08 · 10 answers · asked by TurkishRose 1 in Mathematics

I'm doing a study with two groups of individuals, one who self harm and one who do not. Within these groups people are assigned to one of two interventions at random. These individuals, at the start of the experiment, also undergo a mood manipulation (all undergo the same negative one). This is then followed by the above intervention. I'm testing mood before the mood induction, after the mood induction and after the intervention. So it goes test mood 1 - mood manipulation - test mood 2 - intervention - test mood 3.

Firstly I need to do a few comparisons. I need to compare test 1 with test 3, test 1 with test 2, and test 2 with test 3. Is a repeated-measures t test the best way to go about this, or some kind of ANOVA? (and if so, which would be recommended?)

2007-12-09 03:34:05 · 2 answers · asked by Ju C 1 in Mathematics

The rotational speed on a platform remains unchanged but the distance from the center of the platform is doubled. This will cause the rotational speed to

a. be quadrupled.
b. be tripled.
c. remain the same.
d. be doubled.
e. be cut in half.

2007-12-09 03:33:23 · 2 answers · asked by Anonymous in Physics

Find the dimensions of a rectangle with area 27000 m2 whose perimeter is as small as possible. (Give your answers in increasing order, to the nearest meter.)

2007-12-09 03:33:23 · 2 answers · asked by beccaleigh1911 1 in Mathematics

round little half ball and is fluffy like a cotton ball.
Please?

2007-12-09 03:27:11 · 2 answers · asked by Part Time Cynic 7 in Earth Sciences & Geology

This is what my worksheet says:

If you were to solve the following, what would your first step be?

9) 2x-7=3
a. subtract 7
b. multiply by 2
c. divide by 2
d. add 7

10.) -4=8+(x over 4)
a. subtract 8
b. add 8
c. multiply by 4
d. add 4

11.) 2-4x= -6
a. add 2
b. subtract 2
c. divide by -4
d. add 6

12.) -5+(3 over 4 x)=1
a. multiply by (4 over 3)
b. subtract 5
c. subtract 1
d. add 5

i dont get these AT ALL. what are the answers? they dont make any sense.

2007-12-09 03:19:35 · 4 answers · asked by Anonymous in Mathematics

Jill of the Jungle swings on a vine 6.1 m long. What is the tension in the vine if Jill, whose mass is 61 kg, is moving at 2.9 m/s when the vine is vertical?
N

2007-12-09 03:17:25 · 3 answers · asked by Amber G 2 in Physics

what rock bands are good?

2007-12-09 03:15:38 · 7 answers · asked by Anonymous in Earth Sciences & Geology

How does a hovercraft work? It is something about downward thrust, please relate this to air and flight. Thanks!

2007-12-09 03:08:24 · 4 answers · asked by ƸӜƷ 2 in Engineering

I can't find these answers in my notes..please help!
Tetonic plates that move apart most likely are located along
a.mountains b. contintents c. islands d. rift valleys ?

A Convection current is caused by differences in:
a. temperature b. air pressure c. mass d. color ?

In Earth, hot melted rock rises form near the
a. core b. crust c. inner core d. mantle ?

ANY help with this would be SOOOOO GREAT! Thanks

2007-12-09 03:04:17 · 5 answers · asked by mptodora 2 in Earth Sciences & Geology

According to sedimentologosts the average height reduction for all the continents of the world is about 60 mm per 1,000 years.
In other words, a height of 150 kilometres (93 miles) of continent would have eroded in 2.5 billion years. If erosion had been going on for billions of years, no continents would remain on Earth.
So how come evolutionists can claim that rocks are billions of years old?

2007-12-09 03:03:05 · 10 answers · asked by a Real Truthseeker 7 in Earth Sciences & Geology

Please just list as many ways energy can be stored. Thanks!

2007-12-09 02:59:34 · 5 answers · asked by Anonymous in Other - Science

example: can rhyolite turn into siltstone or is there a direct correspondence to another sedimentary rock?

2007-12-09 02:51:58 · 2 answers · asked by David J 1 in Earth Sciences & Geology

I am looking for the dimensions of a square box with a volume of 48 cubic inches and a surface area of 112 square inches.

2007-12-09 02:48:34 · 11 answers · asked by Anonymous in Mathematics

which theory came first/which one do you believe in the most and why?

2007-12-09 02:48:25 · 5 answers · asked by BIONICT? 2 in Earth Sciences & Geology

why and when did Antarctica started developing a permanent covering of ice. What must have happened to most of the plants and animals on Antarctica when the ice cap formed?

2007-12-09 02:47:14 · 3 answers · asked by Anonymous in Earth Sciences & Geology

i know its 4/5 but how?
method please =D

2007-12-09 02:46:30 · 4 answers · asked by rogla 3 in Mathematics

2007-12-09 02:43:41 · 1 answers · asked by S i r i 1 in Medicine