Science & Mathematics - 17 December 2007

• Which units are derived units? Which are fundamental units?
• Which are vectors, scalars?
• What’s slope of position vs time graph? Is this quantity average or instantaneous?
• Determine the relative momentum of 2 colliding objects.
• What are MKS units for mechanical power?
• According to newton’s law of universal gravitation, describe proportionality relative to the masses of 2 objects.
• According to newton’s law of universal gravitation describe proportionality relative to distance b/t objects.
• Which law is the statement, “ the force of attraction b/t 2 objects is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance b/t their distance of mass”
• Which angle maximizes the range of the projectile.
• If friction force double how long it take to come to rest compared to not doubled friction force
• What’s the resultant force when pulling 2 ropes one 50N north other 30N east? 20N NW????
• What’s tendency of an object to resist change in motion?
• Which 2 angles of projectile motion result in projectile landing in same place?
• To cross flowing river which directions for least time and least distance?
• Crate dropped from plane when box hits where will it be relative to the plane with no air friction?
• What are 2 vectors in the horizontal and vertical directions that replace single vector?

2007-12-17 14:40:13 · 2 answers · asked by j91621 2 in Physics

2007-12-17 14:39:42 · 10 answers · asked by Anonymous in Medicine

any ideas on a science experiment?

how to do it? (highschool level)

2007-12-17 14:38:52 · 1 answers · asked by Anonymous in Biology

2007-12-17 14:37:56 · 7 answers · asked by ♥*~*punk 4 eva*~*♥ 1 in Astronomy & Space

Let f:X → Y be a function. Then for any A⊂Y, f^-1 (Y\A)=X\ f^-1(A).

2007-12-17 14:37:14 · 1 answers · asked by Anonymous in Mathematics

I have a lab due soon and im stuck on my last question. Any help will be appreciated.

-Describe the structure of the lining of the frog's stomach. How does this relate to the stomach's funchtion in digestion?

2007-12-17 14:36:50 · 2 answers · asked by Anonymous in Biology

- What are the initial and final radioactive elements of the decay series and the type of decay (α, β or γ radiation) of 210Po?
- How long is the half-life of 210Po? How long will it take to completely lose its radioactivity?

2007-12-17 14:36:37 · 1 answers · asked by muzuizui 2 in Chemistry

2007-12-17 14:35:49 · 1 answers · asked by FireRedLove 2 in Mathematics

Domain, kingdom, phylum, genus and species name for phytoplankton?

2007-12-17 14:32:48 · 5 answers · asked by Jenni 2 in Botany

2007-12-17 14:29:19 · 1 answers · asked by Susan K 1 in Medicine

help me pretty please =)

2007-12-17 14:26:35 · 2 answers · asked by Anonymous in Biology

2007-12-17 14:26:27 · 17 answers · asked by Anonymous in Astronomy & Space

What's the answer? &
Would you multiply them by tenths or one hundredths???

2007-12-17 14:25:42 · 6 answers · asked by Anonymous in Mathematics

(x^2 - 2x + 1)/(5x^2 - 20x + 15)

2007-12-17 14:25:37 · 8 answers · asked by Anonymous in Mathematics

my homework is to complete a crossword puzzle
and these were the hints,
1) Radioactive rocks have this property
(# of letters : 14)
2) element made when boron and a neutron collide
(# of letters: 9)
3) The parent atom from which astatine and a beta particle are produced
(# of letters:8)

2007-12-17 14:23:20 · 1 answers · asked by Rosie 2 in Chemistry

does anyone know how it is affected by drugs and alcohol, the human anatomy and exercise. PLEASE ITS FOR A PROJECT!!!!!

2007-12-17 14:22:54 · 2 answers · asked by Aaron 2 in Biology

For my essay on unmanned exploration being a smarter investment than manned I have the following subtopics: economy/efficiency and space program failure (apollo 1, columbia, challenger). What should the third one be?

2007-12-17 14:17:40 · 6 answers · asked by english 2 in Astronomy & Space

Sinx-Sin^2 / cos^2x
I have no idea.
Can someone show me how to work it out?

2007-12-17 14:14:49 · 2 answers · asked by adlihdz 2 in Mathematics

Between Karnak and Edfu, the Pharaoh kept 1020 white goats. If these goats represented 17%of the total flock, how many goats did the Pharaoh have?

2007-12-17 14:13:42 · 4 answers · asked by Travis A 2 in Mathematics

2007-12-17 14:11:22 · 4 answers · asked by Sam J 1 in Mathematics

a) no solution
b) 3,-5
c) 3,-3,5,-5
d) 3,-3



explain how to do it .

2007-12-17 14:10:51 · 7 answers · asked by Anonymous in Mathematics

2007-12-17 14:10:40 · 1 answers · asked by Anonymous in Biology

I'm researching the heats of combustion for different fuels, and I need to test this with a bomb calorimeter. Where can I find one to use? Is it possible to build a simple one?

2007-12-17 14:10:05 · 1 answers · asked by Zeuski 1 in Chemistry

a) x+4
b) x+3
c) x-5
d)4x+3

explain . show how to get the answer please?

2007-12-17 14:09:13 · 2 answers · asked by Anonymous in Mathematics

2007-12-17 14:06:31 · 1 answers · asked by beeve.stroganoff 2 in Medicine

3 moles of ammonium phosphate is how many grams?

2007-12-17 13:54:53 · 12 answers · asked by Anonymous in Chemistry

2007-12-17 13:52:39 · 4 answers · asked by Rodrigo l 1 in Biology

O.o

2007-12-17 13:48:21 · 9 answers · asked by Ai 2 in Astronomy & Space

2007-12-17 13:46:06 · 2 answers · asked by Anonymous in Other - Science

by print i mean the dimensions of the print left on the earth.

2007-12-17 13:45:33 · 2 answers · asked by Anonymous in Mathematics