Science & Mathematics - 4 December 2006

how to use them? what do they do? which is better, to use do meter or the winkler method?

Sources are really needed. like what site. authors. you know..

2006-12-04 13:38:57 · 2 answers · asked by Sofia 1 in Other - Science

A bobsled zips down an ice track starting at 150 m vertical distance up the hill. Disregarding friction, what is the velocity of the bobsled at the bottom of the hill? (g=9.81m/s2)

I got 54m/s anyways here are the answer choices:

27m/s
36m/s
45m/s
54m/s

btw i'm asking because for 3 answers in a row i got D so i'm just trying to make sure i'm not messing up here thanks.

2006-12-04 13:38:43 · 4 answers · asked by strawberrylollipop12345 1 in Physics

2006-12-04 13:38:05 · 3 answers · asked by Anonymous in Chemistry

f(x)= 300(1.1^x)
solve using symbolic reasoning.

2006-12-04 13:37:32 · 2 answers · asked by Hamza 1 in Mathematics

2006-12-04 13:37:16 · 7 answers · asked by Anonymous in Biology

heres a few ?s

what is the smallest city(population in texas)?
and what is the smallest population in the usa smallest meaning city as well

2006-12-04 13:37:02 · 6 answers · asked by texasdaddy2009 3 in Geography

i am building a smal vehicle for an engineering project. i am using two sets of wheels, very small ones, (less than an inch in diameter) and very large ones (compact discs), which wheels are supposed to make it roll down an incline faster?

2006-12-04 13:36:15 · 6 answers · asked by Twon 2 in Engineering

Had Galileo dropped a cannonball from the tower of Pisa, 179ft above the ground, the ball's height above ground t seconds into the fall would have been s=179 - 16t^2.

a. What would have been the ball's velocity at time t?

b. What would have been the ball's acceleration at time t?

c. About how long would it have taken the ball to hit the ground?

d. What would have been the ball's velocity at the moment of impact?

2006-12-04 13:35:23 · 4 answers · asked by ccmlgs 1 in Mathematics

we're doing a chemistry test and we need to know the answer for one of our problems

2006-12-04 13:35:13 · 4 answers · asked by Anonymous in Chemistry

2006-12-04 13:34:47 · 3 answers · asked by bribrischuss 1 in Other - Science

A satellite has a mass of 100kg and is in an orbit at 2.00 times 10 to the 6th power m. above the surface of the Earth. What is the potential energy of the satellite at this location? What is the magnitude of the gravitational force on the satellite?

2006-12-04 13:33:21 · 1 answers · asked by Kitana 2 in Physics

10.50 g of gaseous HCl are dissolved in water to give a final solution of 25.6 mL .
What is the molarity of this solution ?

2006-12-04 13:31:50 · 4 answers · asked by nietzsche 1 in Chemistry

ok, so..I'm trying to name the following ionic compounds: [All the numbers in these ionic compounds are subscripts]]

A.) NI3(PO4)2
B.) FeI2
C.) MnF3
D.) CrCI2
E.) NaCN

*****************************************************************
One example that we took in our notes is:

Write the name of CuO
* Needs the charge of Cu
* O is -2
* Copper must be +2
* Copper (II) Oxide
******************************************
Ok, so i sort of get it. I mean, with this example that I followed, I got this: CuS would be Copper (II) Sulfide. Can someone please explain how to do this a little more clearly? thnx

2006-12-04 13:30:48 · 2 answers · asked by Pearl 2 in Chemistry

2006-12-04 13:30:42 · 9 answers · asked by Passion 3 in Astronomy & Space

Old faithful geyser shoots water every hour to a height of 40.0 m. With what velocity does the water leave the ground? (disregard air resistance; g=9.81m/s^2.)

A. 7.00 m/s
B. 14.0 m/s
C. 19.8 m/s
D. 28.0m/s

2006-12-04 13:28:57 · 9 answers · asked by strawberrylollipop12345 1 in Physics

A pirate in a movie is carrying a chest (0.27 m 0.32 m 0.17 m) that is supposed to be filled with gold. To see how ridiculous this is, determine the weight (in newtons) of the gold. To judge how large this weight is, remember that 1 N = 0.225 lb.

Yea, ro = M/V. I know this is the equation I use for this problem but I'm not sure how to incorporate the variables into the equation.

2006-12-04 13:28:10 · 3 answers · asked by Confused 1 in Physics

In my technology class, I'm working with lasers, and the supply bin includes a lucite rod. It's a curved clear stick thing and I don't know what it does. What does it do?

2006-12-04 13:26:20 · 3 answers · asked by ZZ 4 in Engineering

My husband and I are having a little bet - strange topic I know! Can anyone tell me the average weight of a human eye?

2006-12-04 13:25:47 · 2 answers · asked by Erin R 1 in Biology

of ph 4.5 using nach3coo in 800 ml water find no og grams of nach3coo needed ka is 1.8*10^-5

2006-12-04 13:25:42 · 1 answers · asked by Anonymous in Chemistry

mysteriously disappeared and were replaced with animals, What would the square root of a wombat be?

2006-12-04 13:25:38 · 3 answers · asked by Stasi 4 in Mathematics

2006-12-04 13:24:57 · 9 answers · asked by X 3 in Weather

2006-12-04 13:24:53 · 7 answers · asked by bribrischuss 1 in Other - Science

You are boating on a river that flows toward the east. Because of your knowledge of physics, you head your boat 53 degrees west of north and have a velocity of 6.0 m/s due north relative to the shore.

a. What is the velocity of the current?

b. What is the speed of your boat relative to the water?

Please help me with this problem.
I'm having trouble understanding it.

2006-12-04 13:23:28 · 4 answers · asked by vicky p 1 in Physics

is lead and sulfur minerals

2006-12-04 13:22:58 · 7 answers · asked by Lee 1 in Chemistry

2006-12-04 13:22:50 · 14 answers · asked by Thurston Howell III 4 in Astronomy & Space

in which layer[s] do you think the photosynthetic cells would be located? please explain your reasoning.

2006-12-04 13:21:33 · 4 answers · asked by j 2 in Biology

2006-12-04 13:21:11 · 15 answers · asked by Anonymous in Zoology

You row a boat, click for picture, perpendicular to the shore of a river that flows at 3.0 m/s. The velocity of your boat is 4.0 m/s relative to the water.

a. What is the velocity of your boat relative to the shore?

b. What is the component of your velocity parallel to the shore? Perpendicular to it?

Please help me with this problem.
I'm having trouble understanding it.

2006-12-04 13:20:11 · 4 answers · asked by vicky p 1 in Physics

2006-12-04 13:18:29 · 3 answers · asked by Anonymous in Mathematics

ok using d+rt, and the distance is 1800 miles, and the time is 40 hours, using direct variation...wouldnt you just set up the problem like 1800=40x, then divide each by 40 and get x+45....or am i doing something wrong?

2006-12-04 13:18:00 · 4 answers · asked by Ellen 4 in Mathematics