Science & Mathematics - 28 January 2007

please show work 10 points

2007-01-28 08:32:59 · 10 answers · asked by cobra 1 in Mathematics

Please help me by telling me the answer to the equation 75+2t=100-2t t=..... what is t

2007-01-28 08:32:57 · 6 answers · asked by Bea 2 in Mathematics

How much heat (kJ) must be removed in order to change 2.78 moles of water at 49.0 oC to ice at -24.0 oC ?


The specific heat capacity of solid water is 2.03 J g-1 oC -1

2007-01-28 08:32:03 · 2 answers · asked by katttiscool 1 in Chemistry

2007-01-28 08:31:57 · 4 answers · asked by nate b 1 in Mathematics

2007-01-28 08:31:53 · 2 answers · asked by iluvtheyanks2 2 in Botany

2007-01-28 08:30:36 · 7 answers · asked by L 5 in Mathematics

So, for science class, we have to make a flip-book, showing movement. For mine, I am showing how a person breathes to sing. Showing how their stomach starts flat, then takes in air, then quickly lets the air out to produce proper vocal sound. Is this a good idea? Other kids are just showing like a bug moving across the floor.

2007-01-28 08:29:17 · 2 answers · asked by Addicted To Abercrombie & Fitch 2 in Physics

2007-01-28 08:29:10 · 5 answers · asked by iluvtheyanks2 2 in Botany

what is the equilent km

2007-01-28 08:28:49 · 21 answers · asked by ? 1 in Mathematics

2007-01-28 08:28:35 · 8 answers · asked by L 5 in Mathematics

please show work 10 points

2007-01-28 08:28:24 · 4 answers · asked by grim reaper 2 in Mathematics

2007-01-28 08:28:05 · 2 answers · asked by Douglas W 1 in Geography

2007-01-28 08:27:31 · 8 answers · asked by lotus 1 in Zoology

please show work 10 points

2007-01-28 08:27:00 · 2 answers · asked by grim reaper 2 in Mathematics

2007-01-28 08:26:30 · 15 answers · asked by Anonymous in Chemistry

The most efficient means of obtaining energy from glucose requires the presence of carbon dioxide.

True or False?

2007-01-28 08:26:07 · 4 answers · asked by baseballst4r 2 in Biology

This question adds onto the one I asked a while ago, which was (How can I make an electromagnet strong enough to lift a fridge?)

2007-01-28 08:25:59 · 5 answers · asked by brandon c 1 in Physics

can you list 4 similarities and 4 differences in rare earth metals ?

thanks :]]

2007-01-28 08:25:45 · 1 answers · asked by luckyplaya23 2 in Chemistry

2007-01-28 08:24:37 · 18 answers · asked by Anonymous in Weather

An atom has four electrons in its valence shell. What types of bonds is it capable of forming?
a. ionic
b. single, double or triple covalent
c. polar covalent bonds

d. nonpolar covalent bonds
e. All of the above

f. All of the above except ionic bonds

2007-01-28 08:23:48 · 1 answers · asked by Green-Eyed Gal 7 in Chemistry

please show work 10 points

2007-01-28 08:23:44 · 3 answers · asked by grim reaper 2 in Mathematics

Hi y'all. im taking the SAT's this week, and i have a pretest sheet to do for homework.

What is the point-slope form of a horizontal line passing through (-4, -1)?

Also, what is the y-intercept equation for a line perpendicular to 9x-4y= -8

2007-01-28 08:23:20 · 3 answers · asked by legendaryfrog 3 in Mathematics

please show work for 10 points

2007-01-28 08:21:54 · 1 answers · asked by grim reaper 2 in Mathematics

A constant net force of 410 N is applied upward to a stone that weighs 32 N. The upward force is applied through a distance of 2.0 m, and the stone is then released. To what height, from the point of release, will the stone rise?

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

2007-01-28 08:20:22 · 2 answers · asked by swimmertommy 1 in Physics

a worker on a building site raises a bucket full of cement at a slow steady speed, using a pulley. the weight of the bucket is 200 N. the force which worker produces is 210 N. the bucket is raised through a height of 4m.
-through what distance does the worker pull the rope?
-how much work is done on the bucket and cement?
-how much work is done by the worker?
-where does the energy used by the worker come from?

2007-01-28 08:19:52 · 2 answers · asked by minche 1 in Physics

2007-01-28 08:19:25 · 9 answers · asked by Anna Banana 1 in Astronomy & Space

On January 27 (Saturday) there was a ring around the moon. It seemed to be growing more wide every couple minutes. Then, a streak of light (or smoke) shot across the moon and ring. The light moved to the left slowly, and eventually disapeared once it reached the edge of the ring. Who knows what happened? If you didn't see it, and read my observations, what do you think happened?

2007-01-28 08:16:53 · 14 answers · asked by Anonymous in Astronomy & Space

2007-01-28 08:16:27 · 7 answers · asked by horsewoman_77 1 in Medicine

2007-01-28 08:16:16 · 4 answers · asked by Kristina N 1 in Weather

2007-01-28 08:14:59 · 10 answers · asked by computer_guidance 2 in Astronomy & Space