Science & Mathematics - 5 November 2006

2006-11-05 13:12:18 · 8 answers · asked by teeblack07 1 in Mathematics

Calculate the density of a substance in pen-
nyweights per peck that has a volume of .321
hogsheads and a mass of 35.36 kg.
1 pennyweight = 1.55 grams
1 hogshead = 238.5 liters
1 peck = 9.091 liters. Answer in units of
pw=pk.

2006-11-05 13:11:48 · 2 answers · asked by dojorno5 2 in Mathematics

The planet's mass is Mp= 3.35x10^23 kg and its radius is Rp= 4.89x10^6 m (it may be approximated as a soild ball of uniform density). It rotates on its axis once every T= 31 hr. The asteroid has a mass of Ma= 2.03x10^17 kg and a speed of Va= 14900 m/s (which is relative to the planet's center). Its velocity vector point theta= 19(degrees) below the Eastward horizontal. The impact happens at an equatorial location.
a) calculate the planet's angular momentum (relative to its spin axis) before the impact in kg m^2/s.
b)calculate the asteroid's angular momentum relative to the planetary axis in kg m^2/s.
c)The impact is totally inelastic...the asteroid is stuck in the planet's crust. The asteroid's angular momentum makes the planet rotates faster after the impact. By how many seconds has the collision shortened the planetary day in s?
For simplicity, ignore the effect of the asteroid's mass on the planet's moment of inertia and assume: I(after)=I(b4).

2006-11-05 13:11:12 · 2 answers · asked by Anonymous in Physics

any other quantity in nature that has such property?

energy

entropy

temperature

mass

heat

which one is it??

2006-11-05 13:10:51 · 2 answers · asked by chapped lips 5 in Physics

Some boiling points for hydrogen compounds of Group 15, 16 and 17 elements in degrees celsius:

Group 15
PH3 (g)-87
AsH3 (g)-55
SbH3 (g)-17

Group 16
H2S (g)-61
H2Se (g)-42
H2Te (g)-2

Group 17
HCl (g)-85
HBr (g)-67
HI (g)-36

I don't understand the trend between groups... Group 16 is highest, then Group 15, and Group 17 is the lowest? That does not fit into any pattern, whether I think of polarity, molecular size etc.? Can someone explain why this is so?

2006-11-05 13:09:54 · 2 answers · asked by cmdr2006 2 in Chemistry

Do you use geometry in your life daily. Do you use any form of geometry at all during an average day in your life. Anwser either yes, no, or I haven't ever noticed.

2006-11-05 13:09:00 · 6 answers · asked by chcrunner 1 in Mathematics

I've just heard people say that their pets have crushes on their owners sometimes

2006-11-05 13:05:20 · 8 answers · asked by Kara R 2 in Zoology

2006-11-05 13:05:15 · 10 answers · asked by Anonymous in Mathematics

About a salt lake being indicative of rain? My friend heard that the lake changes colour if it is about to rain, sort of like how ants activity greatly increases before it rains. Can you give any websites that have information on this?

2006-11-05 13:05:03 · 1 answers · asked by Anonymous in Weather

say you have four numbers arranged in the corner of a square, you add them once per second for ten seconds, what is the sum, if the numbers are 3, 2, 5, and 1

2006-11-05 13:04:50 · 4 answers · asked by Book of Changes 3 in Mathematics

2006-11-05 13:04:28 · 5 answers · asked by haroon s 1 in Earth Sciences & Geology

2006-11-05 13:04:19 · 2 answers · asked by Katy J 1 in Mathematics

H3PO4 + Sr(OH)2 -->

a) no reaction
b) SrH3PO5
c) SrH5PO6
d) Sr3(PO4)2

Please explain how you get it also. I don't understand this one. Thanks!!

2006-11-05 13:03:52 · 3 answers · asked by Anonymous in Chemistry

What is the purpose of the SETI started by NASA? If it is to detect aliens from outerspace then why does many earthlings report being abducted or seeing space aliens in our planet?

2006-11-05 13:02:00 · 8 answers · asked by ? 6 in Astronomy & Space

-3y+2(y+3) = -4+2(y-3)
please describe what you did to get Y in detail.
thank you.

2006-11-05 13:01:16 · 8 answers · asked by *Ashlen* 2 in Mathematics

2006-11-05 13:01:02 · 2 answers · asked by Jonathan D 1 in Mathematics

I looked through similar questions, but i still don't get it... : (...can someone explain it in easy terms for me? I know it has to do with the Bernoulli's principle.

2006-11-05 12:59:03 · 2 answers · asked by Rafael 2 in Physics

how would u seperate these mixture and solutons?

sand and water:

salt and water:

sawdust and iron filings:

2006-11-05 12:58:36 · 2 answers · asked by Anonymous in Chemistry

It is really confusing me! For example, how would you do x/(x+y)? (x divided x+y). Or if you just have any advice, I'm all ears!

2006-11-05 12:56:29 · 2 answers · asked by Claire 1 in Mathematics

2006-11-05 12:55:13 · 8 answers · asked by chapped lips 5 in Physics

help me solve these. pleaseee.
_________________
Mr. Schultz wanted to write a check for $85. He noticed that he only have $80 in his checking account. What integer shows what Mr. Schultz's checking account balance would have been if he had written the check?
_________________________
In golf, a score of 0 is called even par. One over par is represented by +1 and one under par is represented by -1. In a golf competition, a player had scores of +2 +1 -2 and 0. What was the players total score?
_____________________________
Marias score changes in a video game were +80 -90 and +40. What was the total change?
____________________________
On a test the teacher gave +10 points for each correct answer, 0 points for a skipped question and -5 point for each incorrect answer. There were 10 questions on the test. Alex had 8 correct answers and 2 incorrect. What was his score??

2006-11-05 12:55:13 · 7 answers · asked by Anonymous in Mathematics

2006-11-05 12:53:05 · 6 answers · asked by Anonymous in Biology

2006-11-05 12:52:55 · 18 answers · asked by Anonymous in Mathematics

What is the smallest internal organ in the human body?

2006-11-05 12:51:41 · 2 answers · asked by Manny 1 in Biology

2006-11-05 12:51:26 · 3 answers · asked by Anonymous in Mathematics

I ran a downloaded program and it changed the screen to all black. When tilting it, I can still somewhat see the screen. The calculator is on and still works. I think only the brightness is the problem. How can I change the brightness level back? Thank you.

2006-11-05 12:51:14 · 4 answers · asked by jackalrama 2 in Mathematics

Object A slams into object B (at rest) what will object b's speed be after and will there be any difference in object a's speed after the collision?

2006-11-05 12:51:10 · 6 answers · asked by Anonymous in Physics

A) muscles lining blood vessels
B) muscles lining the gut tube
C) muscles contolling lens shape
D) muscles allowing you to roll your eyes at someone

2006-11-05 12:51:04 · 5 answers · asked by Anonymous in Biology

2006-11-05 12:49:23 · 2 answers · asked by mukunth 2 in Zoology

Side A: square root of 13
Side B: square root of 26
Side C: square root of 13

And could you please tell me your reasoning? Thankyou! :)

2006-11-05 12:48:32 · 5 answers · asked by 2 days after my B day :) 2 in Mathematics