Science & Mathematics - 4 December 2007

Could you please tell me some important facts and information about the element silver (Ag). Im doing a report and i need some good information. I researched a lot on the web but i couldnt find a site with a lot of good information.

2007-12-04 17:12:34 · 3 answers · asked by Tato 2 in Chemistry

1) A 2.00 x 10^3 kg car rounds a circular term of radius 20.0 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.70, how fast can the car go without skidding?


2) A wooden bucket filled with water has a mass of 75 kg and is attached to a rope that is wound around a cylinder with a radius of 0.075 m. A crank with a turning radius of 0.25 m is attached to the end of the cylinder. What minimum force directed perpendicularly to the crank handle is required to raise the bucket?


Answer both or one of the questions. Any help you can give would be greatly appreciated! I really can't get these two. >.<

2007-12-04 17:11:28 · 1 answers · asked by Bernardita 2 in Physics

2007-12-04 17:09:44 · 4 answers · asked by star 1 in Mathematics

A solution is made by adding 54.06g of glucose (C6H12O6) to 250.0g of water. The final volume of the solution is 291 mL. (molar mass of glucose = 180.2 g/mol)...

fond the percent by weight of glucose in the solution...

2007-12-04 17:08:10 · 2 answers · asked by millie1615 1 in Chemistry

An electric current, I, in amps, is given by
I=cos(6 t)+sqrt(6) sin(6 t)
What is the maximum value of I?

2007-12-04 17:06:27 · 2 answers · asked by kevin n 1 in Mathematics

to be where you have been?

2007-12-04 17:06:08 · 17 answers · asked by laura n 3 in Astronomy & Space

i know this is kinda lame, but can anyone help me solve the problem

6 / (5i) i know it equals -1.2i
but i need it simplified in a + bi form :\

2007-12-04 17:02:20 · 2 answers · asked by gamer_buddy 3 in Mathematics

A rancher wants to fence in an area of 400 square feet in a rectangular field using fencing material costing 1.2 dollars per foot, and then divide it in half down the middle with a partition, parallel to one side, constructed from material costing 0.5 dollars per foot.
Assuming that the partition is parallel to the side which gives the width of the field, find the dimensions of the field of the cheapest design.
What is the length?
What is the width?
What is the (total) cost of the cheapest design?

2007-12-04 17:02:03 · 2 answers · asked by Anonymous in Mathematics

2007-12-04 17:01:18 · 2 answers · asked by Mercury 2010 7 in Other - Science

2007-12-04 16:56:05 · 4 answers · asked by D-No 1 in Mathematics

so when they say there mass is always the same... how can that be because if i go to find the mass of gold out in space it would be impossible becuase it would require gravity

2007-12-04 16:44:06 · 12 answers · asked by ry s 1 in Astronomy & Space

2007-12-04 16:43:30 · 6 answers · asked by bistoe 2 in Weather

Find the rectangle of largest area that can be inscribed in a semicircle of diameter 55, assuming that one side of the rectangle lies on the diameter of the semicircle.
The largest possible area is______

2007-12-04 16:43:19 · 2 answers · asked by Anonymous in Mathematics

2007-12-04 16:39:04 · 13 answers · asked by <3 my nut brown maiden 1 in Earth Sciences & Geology

2007-12-04 16:32:48 · 4 answers · asked by ragamuffin 1 in Botany

(R=0.082 L atm/mol K, one mole of water has a mass of 1 grams)

2007-12-04 16:28:42 · 2 answers · asked by Anonymous in Physics

for example the percentage of growth of a plant

begining 6.2 cm
now 11.5

isnt it like old over new or somthing? i cant remember!

2007-12-04 16:28:23 · 5 answers · asked by Mango Muncher 6 in Mathematics

I was wondering if someone could explain the effect of Earth's magnetic field on its tectonic processes. I know that magnetic reversal data is used to prove plate tectonics. But does the magnetic field influence plate tectonics on Earth?

2007-12-04 16:20:19 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-04 16:18:09 · 12 answers · asked by joe h 1 in Astronomy & Space

2007-12-04 16:16:48 · 3 answers · asked by Anonymous in Botany

2007-12-04 16:11:16 · 7 answers · asked by Anonymous in Mathematics

wat was the evolutionary advantage of the proto-eukaryotes that engulfed areobic bacteria but did not digest them?

2007-12-04 16:08:58 · 2 answers · asked by The One 1 in Biology

a.

three phosphate groups.

c.

nucleotide portion.
b.

bonds between the phosphate groups.

d.

ribose portion.

2007-12-04 16:07:53 · 5 answers · asked by Golu S 1 in Biology

2. How does tectonic activity affect landforms?

2007-12-04 16:01:10 · 1 answers · asked by Anonymous in Geography

Bio. Can anyone help me with this question:

Phenol red is a chemical that turns red when carbon dioxide, CO2, is absent and yellow when CO2 is present. A small green plant seedling is placed in phenol red in the dark. Which one of the following is most likely to occur?


Answer: If the solution is red to begin with, it will turn yellow because respiration is occurring.

2007-12-04 15:54:24 · 4 answers · asked by That'sINTENSE! 4 in Biology

So, if a fire breaks lose when snow is around, can it eventually get big enough to engulf, say, apartment buildings?

2007-12-04 15:45:37 · 4 answers · asked by Anonymous in Weather

Write an appropriate metric unit of measure for each quantity.

1. the height of a truck
2. the capacity of a standard shampoo bottle
3. the mass of a pineapple
4. the width of a paperback book

2007-12-04 15:42:11 · 7 answers · asked by apples. 4 in Mathematics

2007-12-04 15:41:54 · 3 answers · asked by Allison 1 in Physics

I can hear electricity running through objects like tvs and computers. What is the hertz that electricity runs at? I would like to know. If anyone has this same ability, are there anyways for me to block the sound and not have it hurt as much?

2007-12-04 15:41:46 · 4 answers · asked by pippenintheshire 2 in Physics

Salt can be an agent of weathering responsible or the breakup of rock. however, under different circumstances, it can also be a victim of weathearing in that in the form of, for example, the mineral halite it can be weathered. In as much detail as you can, explain the weathering processes by which each of these situations may occur.

2007-12-04 15:40:43 · 1 answers · asked by Anonymous in Geography