Science & Mathematics - 14 November 2006

A 2.1 X 10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20.0 degrees with the horizontal. An average friction force of 4.0 X 10^3 N impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway?

I got 3.7 but the answer is 5.1 if someone could post how you do this problem i would really appreciate it.

2006-11-14 08:55:14 · 1 answers · asked by strawberrylollipop12345 1 in Physics

2006-11-14 08:54:47 · 1 answers · asked by lawyergirl 1 in Biology

2006-11-14 08:54:45 · 11 answers · asked by JW 2 in Mathematics

A brick is thrown upwards from the top of a building at an angle of 18.9 degrees above the horizontal and with an initial speed of 21.2 m/s. (The acceleration due to gravity is 9.8 m/s^2). If the brick is in flight for 2.8 s, how tall is the building? (in meters)

2006-11-14 08:53:56 · 8 answers · asked by Anonymous in Physics

Why would Humphrey Davy not get sodium when he electrolysed an aqueous solution of Sodium Carbonate?

Last question on Chem assessment and I WILL NOT LET IT BEAT ME!!!!

Sensible answers will get you 10 points!

2006-11-14 08:52:40 · 3 answers · asked by Anonymous in Chemistry

The rectangular adult pool at the recreation center is half as wide as it is long. it is 24 feet wide. what is its perimetar?

2006-11-14 08:52:29 · 17 answers · asked by baby13 1 in Mathematics

I need this ASAP :)

2006-11-14 08:50:30 · 8 answers · asked by rebekahstadler 1 in Mathematics

I should know this, but I don't. I need to know tomorrow for a test, but my book doesn't have it in it and professor wont tell us because we should "already know this". Any help me out? Thanks!

2006-11-14 08:49:36 · 5 answers · asked by GoBuckeyes! 3 in Biology

If for instance instead of the blood cells carrying C02 in to the heart the blood cells are carrying Oxogen? or do I have it back wards can some one blease tell me?

2006-11-14 08:49:08 · 2 answers · asked by morgana_tyler 1 in Biology

2006-11-14 08:48:46 · 14 answers · asked by Anonymous in Geography

2006-11-14 08:48:37 · 9 answers · asked by quinelifus 1 in Mathematics

2006-11-14 08:47:31 · 14 answers · asked by Anonymous in Earth Sciences & Geology

where the electrons are located in an atom???

2006-11-14 08:46:58 · 2 answers · asked by jouliette 1 in Physics

Is there any web site where I can get pictures of the tallest mountain. What ever it is. Please help.

2006-11-14 08:46:32 · 7 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-14 08:41:46 · 5 answers · asked by lmm32193@sbcglobal.net 1 in Chemistry

Okayy
so for biology we need to make analogies about parts of the cell. To give an example that i have is a vacuole to a storage garage.
So i have to take an everyday thing or place and relate it to parts of the cell..

Tryy helping me out with most of these, i am soo stuck!:

Cell membrane
cytoplasm
ribosomes
mitochondria
nucleus
Nucleolus
Endoplasmic reticulum
Cell membrane
chromatin
cytoplasm
lysosome
cytoskeleton



Thankk you so much

i know you can't get all of them , but if u get most you'll get 10 points.. i suck at biology and i've been working on this foreverrr!!

2006-11-14 08:41:13 · 3 answers · asked by HollaBack 2 in Biology

A brick is thrown upwards from the top of a building at an angle of 18.9 degrees above the horizontal and with an initial speed of 21.2 m/s. (The acceleration due to gravity is 9.8 m/s^2). If the brick is in flight for 2.8 s, how tall is the building? (in meters)

2006-11-14 08:40:55 · 6 answers · asked by Anonymous in Physics

help

2006-11-14 08:40:15 · 1 answers · asked by james o 1 in Physics

If not, in which Northern constellation do you think it is ?

2006-11-14 08:37:34 · 1 answers · asked by Nicolette 6 in Astronomy & Space

Does the ampere of electric current change throughout a simple circuit. Let say if i put the ammeter in different location of the circuit, would the amount of ampere change?

My inference: I dont think so because electric current is the same at all points since the electrons hat is leaving the battery contains the same flow of coulombs every second.

Am i correct, if not please explain

2006-11-14 08:36:19 · 4 answers · asked by Anonymous in Physics

I know some have "sling shots", but what I dont understand is if gravity is the answer, how rollercoasters can do loop the loops that are higher than the top of the chain lift where the roller coaster is first released. Example is Kumba at Busch Gardens Tamps, its loop the loop is higher than the point in which the rollercoaster released.....is this possible?

2006-11-14 08:35:44 · 3 answers · asked by Stuart J 2 in Physics

2006-11-14 08:34:57 · 2 answers · asked by Anonymous in Physics

2006-11-14 08:34:36 · 4 answers · asked by popinfla 1 in Weather

It seems in the winter, us human beings are more hungry and want to sleep more too! Is it because we are hibernating?

2006-11-14 08:34:02 · 3 answers · asked by Pink Pony Girl 1 in Zoology

HELP SOOOONNNNN

2006-11-14 08:33:33 · 6 answers · asked by Shelby C 1 in Botany

PLEASE AND THANKYOU!

2006-11-14 08:33:02 · 3 answers · asked by tracklurver09 3 in Chemistry

2006-11-14 08:32:58 · 2 answers · asked by Anonymous in Engineering

2006-11-14 08:32:21 · 9 answers · asked by Anonymous in Mathematics

2006-11-14 08:31:41 · 20 answers · asked by Em 1 in Zoology

I pretty much want to know how long we think the earth has been in existance from birth to now.

2006-11-14 08:29:40 · 12 answers · asked by persevere6 2 in Astronomy & Space