Science & Mathematics - 18 February 2007

My friends and I are making a short film for school/final exam and I play a girl that smokes weed constantly.We have a fake cigarette but now is there so type of smoke powder or capsule that I can put in my mouth and blow it like I been smoking???? In advance thanks so much for the help!

2007-02-18 18:40:18 · 6 answers · asked by j_beba90 1 in Medicine

name atleast three..

2007-02-18 18:38:06 · 3 answers · asked by Anonymous in Medicine

1. A 10 kg bix,initially at rest, is pulled through a distance of 8 m across a level floor by a 10 N force applied parallel to the floor.The coeffcient of friction between the floor and the box is 0.25
a. what is the work done by the force ?
b. what is the work done by friction?
c. what is the network on the box?
d. what is the speed of the box at the end of 5 m?

2.Two bodies of masses 2 kg and 4 kg moving with velocities of 10 m/s, east and 20 m/s west respectively,collide head on.
a. what is the total momentum of the bodies before collision ?
b. if the collision perfectly inelastic,what is the velocity of the bodies after collision?
c. if the collision is perfectly elastic,what is the velocity of the 2 kg and 4 kg ball after collision?

please kindly help me with dis problem
a BIG THANKS

2007-02-18 18:37:23 · 3 answers · asked by ice_cream_chico 1 in Physics

2007-02-18 18:37:08 · 2 answers · asked by Anonymous in Biology

2007-02-18 18:34:45 · 1 answers · asked by yoj 1 in Mathematics

2007-02-18 18:31:40 · 10 answers · asked by ibid 3 in Astronomy & Space

like to grow them without water or to grow them underwater. it is a new study and i forgot what it was called.

2007-02-18 18:31:15 · 4 answers · asked by Spikey lover 1 in Botany

2007-02-18 18:29:04 · 5 answers · asked by ramin mardfar 1 in Zoology

2007-02-18 18:28:50 · 4 answers · asked by Anonymous in Physics

Need some help remembering how to do a math question. Bob gave out 16 tickets, the whole department gave out 64 tickets what % of the total tickets did bob give out?

2007-02-18 18:26:10 · 8 answers · asked by asclepeus1 2 in Mathematics

2007-02-18 18:24:58 · 1 answers · asked by asal 2 in Engineering

2007-02-18 18:22:43 · 1 answers · asked by anjum 1 in Engineering

other than MS,MTECH,MBA...wht othr courses can i join??

2007-02-18 18:18:52 · 4 answers · asked by anjum 1 in Engineering

whats the diff between humans and frogs

2007-02-18 18:18:01 · 12 answers · asked by lingnienshin 2 in Zoology

I'm doing a roport on the gray fox due this wendsday(?), and i need to know how a gray fox finds water in the desert, thankyou.

2007-02-18 18:17:16 · 3 answers · asked by Anonymous in Zoology

Has the temperature of the sun changed ?

2007-02-18 18:15:10 · 13 answers · asked by Anonymous in Astronomy & Space

2007-02-18 18:14:37 · 10 answers · asked by rolfesangel 2 in Zoology

recently a report on NPR mentioned that a researcher at the University of Arizona is working on the feasibility of puting a screen between the Earth and the Sun to shade the Earth and prevent global warming. i think this is the wrong approach because this solution does not address the cause of global warming. lets say that in this project is undertaken and succeeds some 50 years from now, would people care to reduce carbon dioxide emissions? it just seems like this solution is the path of least resistance. by the way, NASA has decided to fund this research. I have included a link that revealsmore about this project http://www.sciencedaily.com/releases/2006/11/061104090409.htm

2007-02-18 18:12:03 · 8 answers · asked by jonatan 2 in Astronomy & Space

or what other scenarios cause non covergence? any help is appreciated.

2007-02-18 18:11:39 · 2 answers · asked by doverbeach 3 in Mathematics

An inventive child wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley, the child pulls on the loose end of the rope with such a force that the spring scale reads 320 N. The child's true weight is 280 N, and the chair weighs 160 N.

(a) Show that the acceleration of the child-chair system is upward and find its magnitude.
___ m/s2
(b) Find the force the child exerts on the seat of the chair.
___ N

Thank you so much!

2007-02-18 18:11:18 · 4 answers · asked by Anonymous in Physics

Calculate the frequency, in hertz, of the photon that is emitted when a electron falls from level n = 9 to level n = 4 in the H atom.

2007-02-18 18:08:11 · 2 answers · asked by Anonymous in Physics

2007-02-18 18:07:26 · 10 answers · asked by xcaluber 1 in Physics

2007-02-18 18:06:42 · 2 answers · asked by Anonymous in Biology

A ball is thrown vertically upward with a velocity of +10.0 m/s.
(a) How high does it rise?
___m
(b) How long does it take to reach its highest point?
___s
(c) How long does the ball take to hit the ground after it reaches its highest point?
___s
(d) What is its velocity when it returns to the level from which it started?
___m/s

2007-02-18 18:05:06 · 3 answers · asked by Anonymous in Physics

2007-02-18 18:03:36 · 11 answers · asked by Dennis C 1 in Geography

please hepl

2007-02-18 18:03:01 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-02-18 18:02:56 · 5 answers · asked by teddy 2 in Earth Sciences & Geology

What quantum number is associated a hydrogen atom orbital that has an energy of −4.445 x 10−20 J?

2007-02-18 18:00:38 · 2 answers · asked by Anonymous in Chemistry

How do we build bridges that are surrounded by water? How is that possible i always wondered how. For example i live in NJ and how did they build the George Washington Bridge and the Lincoln Tunnel Just HOW!!

2007-02-18 17:56:51 · 4 answers · asked by Fernando M 2 in Engineering

2007-02-18 17:53:58 · 4 answers · asked by Jackie G 1 in Mathematics