Science & Mathematics - 26 November 2007

How can I xpress the in miles per hour:
1) 1 miles in 4 mins
2) 21,120 ft in 4 hours
Show work
ANOTHER PROBLEM:
hUMAN HAIR grows at a rate about .35mm per day. How much does it grow in 30 days?
Thanx

2007-11-26 09:29:14 · 7 answers · asked by Saya 2 in Mathematics

Should I use the paper towels one at a time or should I use them together, say, one behind the other?

2007-11-26 09:28:41 · 19 answers · asked by Anonymous in Engineering

2007-11-26 09:28:10 · 16 answers · asked by Anonymous in Physics

2007-11-26 09:27:38 · 3 answers · asked by jj 2 in Earth Sciences & Geology

how do I find the log of:

1. Log(sub12) 1

2. Log(sub12) 12

3. Log(sub12)144

2007-11-26 09:25:28 · 5 answers · asked by Matty B 3 in Mathematics

2007-11-26 09:23:25 · 2 answers · asked by IDchecker27 2 in Chemistry

can i make or buy a propeller ( i mean a good sized one that is like 4 or 5 feet in length) and a small engine to make it spin for under 300 dollars, i want informative answers, dont give me critiqes or your B. S. suggestions would be nice 2

2007-11-26 09:22:34 · 3 answers · asked by Philippe S 2 in Engineering

I know heat from steam and whatnot can be changed to electricity, but is it possible to change the heat from the atmosphere to electricity?

2007-11-26 09:21:34 · 3 answers · asked by Hans 1 in Engineering

GOD I HATE MATHS

2007-11-26 09:21:16 · 6 answers · asked by K Rigby 1 in Mathematics

I was learning these and i went to do them and i forgot could you show like the steps in how you do them?

1.aluminum sulfate +barium chloride --> aluminum chloride + barium sulfate

2.sodium hydrogen carbonate --> sodium carbonate + carbon dioxide +water

2007-11-26 09:19:54 · 4 answers · asked by r 2 in Chemistry

| 10 - 4x | ≤ 2

≤ (less than or equal to)

2007-11-26 09:18:36 · 9 answers · asked by Anonymous in Mathematics

use the numbers 4 4 4 4 only one time

2007-11-26 09:18:32 · 6 answers · asked by stephanie n 1 in Mathematics

as we know, hydrogen is highly flammable diatomic gas, and fire needs oxygen to burn. and we all know water is H2O, 2 hydrogen and 1 oxygen. since water has 2 hydrogen and 1 oxygen. why cant fire burn it?


hmm, i am gonna make the first vehicle that burn water by extracting oxygen from the water and leave the flammable diatomic gas. LOL!

2007-11-26 09:17:39 · 6 answers · asked by Bun 4 in Chemistry

My teacher said there are 9 and I need to know them. All I can find are:
Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, and Italy. What is the 9th one?

2007-11-26 09:16:25 · 0 answers · asked by Anonymous in Geography

2007-11-26 09:13:27 · 6 answers · asked by Ryan T 1 in Biology

Light power it's measured in Watts/stereoradian but this is not sufficient to measure the human perception of light so it's "invented" the candela, which has to do with the “light sensitivity function”.

So it happens with sound. We perceive sounds with same power but different frequency as if they had different intensity. So it’s invented the loudness or the dBA which consists on adding or subtracting dB to the real intensity so we obtain loudness.

The difference between this two facts is for mi very big: light has to be measured with a new basic unit (candela) but sound can be measured just adding or subtracting to the real measurement (in dB’s) a factor given in a chart (in dB’s too) obtaining dBA which is not actually a new unit.

My question(s) (at last!) is(are):

Couldn’t be the light measured just with a correction factor as it’s done with sound so we didn’t have to use the candela?

Could be defined a new basic unit to express the loudness?

2007-11-26 09:12:58 · 2 answers · asked by JPM 1 in Physics

2007-11-26 09:12:13 · 2 answers · asked by Anonymous in Engineering

Carbon reacts with steam (H2O) under certain conditions to produce hydrogen and carbon monoxide.

a) If 2.4 moles of carbon reacts with 3.10 moles of steam, identify the limiting reactant.

b) How many moles of each product are formed?

c) How many grams of each product are formed?

2007-11-26 09:11:23 · 3 answers · asked by Caramel 2 in Chemistry

Alright I have 2 questions...

First:
Is the intersection of two planes another plane?

And:
Are verticles ONLY equal if two lines are parallel and cut by a transversal?

Thanks if you can help.
I know I sorda cheated asking two questions, but Geometry is probably the most confusing thing ever.

2007-11-26 09:10:17 · 9 answers · asked by Gleenn 1 in Mathematics

Has anyone had an impressive experience with a Medium, Clairvoyant, or Psychic in the Northeastern part of Ohio? It is for a gift, so I especially would like some reviews or positive experiences on whomever you suggest, as well as location and contact information. Thanks a bunch!

2007-11-26 09:07:19 · 2 answers · asked by sunnydaze 3 in Parapsychology

Does his impression of me really matter or does he just go by the transcripts?

The meeting is about what classes I will need to take to get a second Bachelors in Physics. The way I see it, the meeting is just a formality but I could be wrong.

2007-11-26 09:04:35 · 7 answers · asked by Anonymous in Physics

Case 1 and case 2 show two situations of a block hanging
from a string wrapped around the outside of a pulley. The
blocks are identical, and the pulleys are uniform solid
disks of the same radius, but the pulley in case 2 has twice
the mass (and therefore twice the moment of inertia) of
the pulley in case 1. The systems are released from rest at
the same time from the same height above the ground, and
in both cases the block accelerates down. Neglect friction.

(a) In which case is the acceleration of the block
larger?

(b) In which case is the tension in the string, while the block is falling, larger?

(c) In which case is the net torque on the pulley, while the block is falling, larger?

(d) In which case does the block have a higher speed after falling through a distance h?

(e) In which case does the pulley have a larger rotational kinetic energy, measuring the
kinetic energy at the instant the block reaches the ground in each case?

2007-11-26 09:00:25 · 1 answers · asked by yep 1 in Physics

2007-11-26 09:00:23 · 4 answers · asked by parkhurst6 1 in Engineering

1. 4 sqrt(2x-1) = 2 was told square both sides which then gets 2x-1^4=2^4 which eventually becomes 2x=17 so X=8.5. Why didn't the 2X get a "^4" added to it?

2. sqrt (-12) = 2i sqrt 3 - what happened to the negative?

2007-11-26 08:59:35 · 5 answers · asked by B K 1 in Mathematics

2007-11-26 08:59:05 · 6 answers · asked by Anonymous in Geography

using the mectric system 2.

2007-11-26 08:57:48 · 4 answers · asked by Anonymous in Other - Science

1. for a solve1/a+1/b=1/c
2. for x solve y=-3x+2
3. for s solve 2=(x-m)/5

2007-11-26 08:56:59 · 2 answers · asked by brock.young 1 in Mathematics

integers

2007-11-26 08:56:08 · 35 answers · asked by Jonathan J 1 in Mathematics

To be specific I need to find two, but the more the better! Thanks!

2007-11-26 08:56:06 · 2 answers · asked by Jerry 3 in Chemistry

Help its for homework!

2007-11-26 08:55:01 · 2 answers · asked by Anonymous in Chemistry