Science & Mathematics - 5 December 2007

2007-12-05 06:46:03 · 4 answers · asked by gigi 1 in Geography

If an asteroid's diameter is b/w 47-100 meters
and it's velocity relative to earth is 13.0 km/sec.
and the composition is unknown.
and we know that it has come w/i 0.0409 AU of Earth...

what is the maximum amount of energy that would be deposited on Earth in the worst case scenario?

How do you calculatet his?
It's telling us to us the kinetic energy formula which is: 1/2mv^2.
But I don't know how to find the mass of an object if we have the diameter.
Thanks! :D

2007-12-05 06:44:29 · 8 answers · asked by Miss Realistic 2 in Astronomy & Space

A 150.0 g sample of a metal at 75.0'C is added to 150.0g of H2O at 15'C. The temperature of the water rises to 18.3'C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water.

2007-12-05 06:43:35 · 6 answers · asked by Caramel 2 in Chemistry

Express log4 3 and log16 3 as logarithms to the base 2. Hence find n if log2n = 2log4 3 + 8log16 3 show all working out.

2007-12-05 06:41:58 · 3 answers · asked by Liverpool1 1 in Mathematics

2007-12-05 06:37:50 · 7 answers · asked by KENNY O 1 in Biology

I understand from basic Physics at school that an item must travel at a particular trajectory around another item floating in zero gravity in order to be picked up into orbit. I was taught that satellites are maintained in orbit through physics alone, because they are caught in the gravitational field of Earth, while traveling at a particular angle, which prevents them from ever colliding with the planet. I was also taught that gravitational fields only occur in zero gravity. Does this mean that any item traveling in zero gravity could take things into orbit? For example, could an astronaut, floating in space, place small items into their own orbit? Is orbit determined purely by the size of the orbiting item in relation to the item it orbits, or does an item have to be a certain size to develop or enter orbit?

2007-12-05 06:36:42 · 10 answers · asked by katie_london 3 in Astronomy & Space

A 5 yr old boy is 100% above normal height for his age group and recently has been complaining of headaches and vision problems. A CT scan indicates a large pitutary tumor.

a) what hormone is being secreted in excess?
b) what is the name of the condition the boy exhibits
c)what is the cause of the neurological symptoms
d) how can this problem be solved

2007-12-05 06:34:57 · 2 answers · asked by damigurl05 1 in Medicine

2007-12-05 06:32:54 · 3 answers · asked by fadedg1ory 1 in Biology

Mendel's law of segregaton may be interpreted to mean:
a) offspring get one set of genes from each parent
b)similar genes are found on the same chromosome
c)different individuals use different genetic codes
d)genes for differet traits are found on different chromosomes
e)genes are information for building proteins

2) principle of independent assortment is based on the concept that:
a)genes are not always linked
b)chromosomes are the units that genes are made of
c)independent events combine to create each gene
d)chromosomes are independent of individual traits
e)homozygous alleles are not inherited

2007-12-05 06:31:40 · 1 answers · asked by Anonymous in Biology

The tortoise and the hare decide to race again. How do you want the race to turn out? Should slow and steady win the race? Maybe this time the hare will win, or the race will end in a tie. Create a problem based on the tortoise and the hare that you can solve by using a system of linear equations. Explain how to solve your problem by using a system of linear equations. Explain why you chose your winner; Please explain step by step and show the example

2007-12-05 06:31:40 · 1 answers · asked by Triston K 1 in Mathematics

On "M.A.S.H." they did a show on blood transfusion. A racist didn't want want BLACK blood. Who was the man who pioneered blood transfusion?

2007-12-05 06:31:36 · 1 answers · asked by wayne 4 in Medicine

A 15.0 g sample of nickel metal is heated to 100.0'C and dropped into 55.0 g of water, initially at 23.0'C. Assuming that all the heat lost by the nickel is absorbed by the water, calculate the final temperature of the nickel and water (nickel (specific heat) is 0.444 J/g 'C)

2007-12-05 06:30:48 · 1 answers · asked by Caramel 2 in Chemistry

Which items of the food you eat are from a source that has been
“Genetically Modified”?

2007-12-05 06:30:41 · 1 answers · asked by Kenny 1 in Botany

2007-12-05 06:30:18 · 8 answers · asked by Anonymous in Mathematics

i'm supposed to write an essay proving how macroevolution is wrong and microevolution is right. but i'm kinda confused on the whole difference thing. can someone plllleaseee help me????? 10 points and 5 stars to best answer!!

2007-12-05 06:30:02 · 10 answers · asked by Anonymous in Biology

2007-12-05 06:29:45 · 3 answers · asked by Alexander 6 in Mathematics

There are billion and billions of stars smaller and larger than our son, billions of light years out into the universe there are stars just like the sun. With a strong possibility that they have planets orbiting around them... It's VERY narrow minded AND arrogant to think that Earth is the only planet with life, and that the rest of the universe is just a pointless waste of space... what makes people think they have some privilege as humans?

Christians as well with their "Eve is the mother of all life", although not all of them are that stupid.

2007-12-05 06:28:38 · 15 answers · asked by Anonymous in Astronomy & Space

Is this even a valid question? lol
A young {brainy} boy asked me this question, said it was asked of him for something or another...
Possibly refering to longitude/laditude? I don't have a clue.

Thanks!

2007-12-05 06:27:58 · 2 answers · asked by Anonymous in Geography

The Geologic Column was invented by Charles Lyell in the early 1800's. He came up the this http://evolution-facts.org/images/ev-cr-pix/EC418.jpg
This was made around 100 years before radiometric dating was invented and is still how scientists date fossils today. It is anyone’s guess in how he knew how old the layers of the earth were. This site describes how scientists really date fossils http://www.eadshome.com/Fossils.htm
they use circular reasoning to date fossils. Why the layers cannot be millions of years apart. One obvious reason is the layers are tightly compact and if they were millions of years apart don't you think you would see erosion. (Where is the dirt coming from?) Here is another website that proves the layers are not millions of years apart http://www.wasdarwinright.com/geologicalcolumn.htm
Atheists you should start looking at some of the proof creationists have.

2007-12-05 06:27:21 · 11 answers · asked by King Arthur 3 in Earth Sciences & Geology

Of course I’ve had Déjà vu before. Like when I go to do something or go somewhere it’s like I’ve dreamed about what I was going to do, or dreamed about a place I’ve never been before that I end up visiting later on.

I’m not sure if Déjà vu is supost to have those lines above the letters because this is how word pad corrected them in spell check lol.

2007-12-05 06:26:35 · 12 answers · asked by Anonymous in Paranormal Phenomena

____ dating uses the properties of atoms in rocks and other objects to find their ages.

a. Comparative
b. Absolute
c. Approximate
d. Relative

2007-12-05 06:25:59 · 3 answers · asked by Jonathan W 1 in Earth Sciences & Geology

i dont know how to writ eht formulas for any of thees. i dont understand the methods you are supposed to use. i am so confused!
sulfuric acid
ammonium suflide
iron (II) oxide
hydrosulfuric acid
nickel bromide
bromic acid
ammonium bisulfate
nitrogen dioxide
sodium phosphate
magnesium phosphate
nickel bicarbonate
zinc hydroxide
hydroiodic acid
aluminum phoshpate
silver chromate
magnesium sulfite
chromium (III) phosphide
cobalt (III) nitrate
mercury (I) sulfate
copper (II) nitrite
phosphorus trichloride
lead (IV) chloride
iron (III) oxide
silver (I) oxide
manganese (II) hydroxide
ammonium carbonate
antimony pentasulfide
mercury (II) nitride
lead (II) hydroxide
mercury (I) iodate
iron (III) sulfate
nickel (II) sulfate
zinc (II) iodide
iron (II) flouride
nickel (II) selenide
sodium bisulfate
copper (I) carbonate
mercury (I) sulfate
manganese (II) oxide
nickel (II) chloride
lead (II) acetate
pottasium antimonide
nitric acid
cadmium nitrate

2007-12-05 06:25:48 · 6 answers · asked by iloveyou! 1 in Chemistry

An object weighs 315 N in air. When tied to a string, connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
1. The density of the oil

2007-12-05 06:24:48 · 1 answers · asked by Saleh N 1 in Physics

2007-12-05 06:23:50 · 6 answers · asked by samsonite 2 in Engineering

i live in the north of england and set off to work at 6.30 am. when i come out of my back door and the sky is clear (its mostly cloudy!!) there is a very bright object in the sky. i think i'm looking east and i'm pretty sure its venus. am i correct? also if i look to the west more or less 180 degrees there is a little red star. could this be mars? i've tried using google sky but my pc is too clogged up with crap for it to work properly so i cant use it!! thanks

2007-12-05 06:22:22 · 5 answers · asked by Ivan R Don 4 in Astronomy & Space

In which of the following statements is the functional group correctly identifed for the given compound ?


a) CH3CH2CH2COH alcohol


b) H3CCOCH3 aldehyde


c) CH3COOCH2CH3 ketone


d) C6H5CN amine

there may be more than one correct answer

2007-12-05 06:20:48 · 3 answers · asked by Anonymous in Chemistry

Hi-
I am on many pain pills after just having had spinal surgery. Not taking them is not an option.

I take 3-4 stool softeners a day, 2 sennas at night, and 2 milk of mag tablets at night. This helped for 2 days - then the novelty wore off. I need several suppositories just to be able to go.

My doctor's nurse just keeps telling me to take up to 4 stool softeners a day. It's not working.

1) How's the best way to take the stool softeners - throughout the day, or all at once? Or take 1 w/ every pain pill?

2) Is there a prescription pill for this constipation I can take? Are my pills not 'tough' enough?

I'm in enough pain, I don't need this pain........

Thanks!

2007-12-05 06:18:24 · 4 answers · asked by mooth 2 in Medicine

In nature, the alkali metals occur as

a) Compounds
b) Comples ions
c) Gases
d) elements

2007-12-05 06:18:01 · 2 answers · asked by Susan J 2 in Chemistry

how do i name these acids: HCI
HNO3
H3PO4
HCIO4
HIO3
H2S
HCI
HC2H3O2
HCN
HSO3
H2CRO4
HF
H2SO4
H2CO3
H3PO3
HNO2
HCIO3
HCIO
HBr
HI

2007-12-05 06:15:49 · 7 answers · asked by iloveyou! 1 in Chemistry

How is a "crystal" vase different from a regular glass in how it's made? The only method I know of to make a glass is glass blowing. How do they make sets of glasses all exactly the same size and shape?

2007-12-05 06:14:31 · 0 answers · asked by The Nibbler 1 in Engineering