Science & Mathematics - 9 November 2006

A crate is pulled a force ( parallel to the incline) up a rough incline. The crate has an initial speed of 1.53 m/s The crate's mass is 11 kg. The crate is pulled a distance of 7.46 m on the incline by a 150 N force. The coefficient of kinetic friction is 0.347 between the crate and the incline. The acceleration of gravity is 9.8 m/s2.

a) What is the change in kinetic energy of the crate ?
b) What is the speed of the crate after it is pulled the 7.46 m ?

2006-11-09 10:55:13 · 2 answers · asked by Anonymous in Physics

6 + square root 8 / 2

I got 6 + square root 2 and the answer is supposed to be 3 + square root 2 could anybody show me how do this question properly?

2006-11-09 10:54:52 · 6 answers · asked by Silentspeedster 2 in Mathematics

2006-11-09 10:53:34 · 6 answers · asked by mare0705 2 in Biology

Solve for X x^2+6x+4=0

2006-11-09 10:51:47 · 8 answers · asked by pfcmitchell1987 2 in Mathematics

sciense question

2006-11-09 10:51:30 · 3 answers · asked by Tristen C 1 in Physics

a. How many liters of ammonia at STP are formed when 25 L of N2 at STP react with H2.


b. How many liters of H2 AT 25 Centigrade and 1 atm are needed to react with 398L of N(2) Centigrade and 1 atm.


c.How many liters of NH3 at STP are formed when 9.56L of N2 at STP reacts with 27.1 L of H2 AT stp (This is a limiting reactant problem)



This problem gave me the fluxxxx. I worked it through though...Let's see if you can.

2006-11-09 10:50:44 · 2 answers · asked by nst 1 in Chemistry

A mechanic pushes a 3253 kg car from rest to a speed of v, doing 3996 J of work in the process. During this time, the car moves 23 m.
a) Neglecting friction between the car and the road find v.
b) Find the horizontal force exerted on the car.

2006-11-09 10:49:58 · 1 answers · asked by Anonymous in Physics

I thought that molecular weight applies to compounds of any type? Also what is the difference between molecular weight and formula weight? Any help is much appreciated.

2006-11-09 10:49:56 · 3 answers · asked by Gideon 1 in Chemistry

and you touch his stinger will it still sting you?

2006-11-09 10:48:06 · 6 answers · asked by Anonymous in Zoology

A 73.3 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled is pushed a distance of 5.6 starting from rest its speed is 7.1 m/s. Find the magnituide of the net force on the bobsled. Answer in units of N.

2006-11-09 10:47:55 · 2 answers · asked by Anonymous in Physics

geography

2006-11-09 10:46:48 · 4 answers · asked by leanne_bevis2000 1 in Geography

2006-11-09 10:42:31 · 4 answers · asked by Anonymous in Geography

2006-11-09 10:42:29 · 7 answers · asked by C.C. 4 in Engineering

2006-11-09 10:41:34 · 15 answers · asked by wheresmyscript 1 in Zoology

1. KCl solution and a AgNO(3) solution.


2. Na(2)SO(4) solution and a Ba(NO3) (2) solution.

2006-11-09 10:41:30 · 3 answers · asked by nst 1 in Chemistry

We know that Pluto was reclassified as a "dwarf planet" by the IAU because it has not cleared its own orbit of debris.
http://www.iau2006.org/mirror/www.iau.or...

It meets the other two criteria for a planet. So, as time passes and Pluto accretes more of the small objects in its path, will it clear the orbit enough to regain its status as a planet. None of us will be alive at that time, of course. I suppose that what I am really asking is, "How clear is clear?"

Thanks!

2006-11-09 10:38:08 · 6 answers · asked by Otis F 7 in Astronomy & Space

2006-11-09 10:37:10 · 3 answers · asked by danette p 1 in Chemistry

i got this question from my chemistry teacher and i'm not getting answers for this question can anyone help me.

2006-11-09 10:35:49 · 2 answers · asked by Anonymous in Chemistry

i am confused why pcl5 exists and ncl5 doesn't?

2006-11-09 10:35:24 · 2 answers · asked by Anonymous in Chemistry

2006-11-09 10:35:19 · 13 answers · asked by redwinnipegcat 1 in Engineering

Nature takes its course when it comes to the cool breeze or the pouring rain. A day in a wooded area in cool weather is thought to be refreshing. When people think of a story that takes place outdoors, it is sometimes important to include the weather in their stories. How is weather an important factor to the atmosphere or the mood of people in this world?

2006-11-09 10:33:28 · 9 answers · asked by blingding 5 in Weather

the atomic number is 92. boomer sooner will u be the first, im going to give you best answer for all of the ones you do answer.

THANKS

2006-11-09 10:33:09 · 3 answers · asked by Anonymous in Chemistry

2006-11-09 10:31:26 · 6 answers · asked by rose 2 in Astronomy & Space

2006-11-09 10:30:50 · 11 answers · asked by Edward H 1 in Astronomy & Space

I know that when a base and an acid react, one of the products it forms is salt. When ammonium hydroxide and acetic acid are mixed what is the salt they form?
Please explain.

2006-11-09 10:29:43 · 4 answers · asked by Anonymous in Chemistry

... &♥;

2006-11-09 10:29:40 · 4 answers · asked by Sarah w 1 in Chemistry

2006-11-09 10:29:38 · 2 answers · asked by AnSwERinho 3 in Astronomy & Space

2006-11-09 10:29:21 · 6 answers · asked by symone s 1 in Astronomy & Space

I need to know a name of one.

2006-11-09 10:27:32 · 2 answers · asked by Anonymous in Chemistry

Fill in the blanks with negative signs to make the number setence true.
#1: _19 + _110 / _11 - _ 8 + _47 = 30

#2: _7 + _39 / _3 = 6

2006-11-09 10:25:24 · 9 answers · asked by NephthysGal 1 in Mathematics