Science & Mathematics - 18 July 2007

2007-07-18 16:14:29 · 8 answers · asked by paladius 1 in Biology

Tsunamis are fast-moving waves often generated by underwater earthquakes. In the deep ocean their amplitude is barely noticable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. One tsunami, generated off the Aletian islands in Alaska, had a wavelength of 623 km and traveled a distance of 3160 km in 5.23 h.

2007-07-18 16:11:55 · 3 answers · asked by adrianterrellhogan 1 in Physics

2007-07-18 16:11:39 · 9 answers · asked by red_red_downcast 1 in Mathematics

If we send a space craft to another planet and leave it there does that reduce the mass of the earth and thus reduce the gravity of the earth and thus reduce the weight of everything on the earth?

2007-07-18 16:11:37 · 6 answers · asked by BillD 3 in Physics

There are 9 cards. Separate them into 3 stacks, each stack has 3 cards. Then, take away the cards, one at a time. You can only take card from the top. So, how many ways are there to take away all the 9 cards?
Please explain how you solve it. Thank you.

2007-07-18 16:09:23 · 6 answers · asked by nomade_contabile 1 in Mathematics

What's a good way to memorize the trigonometric values of common angles? I have to know them by Friday.

2007-07-18 16:09:14 · 6 answers · asked by Anonymous in Mathematics

This year, 75% of a graduating class of harriet tubman high school had taken at least 8 math courses . Of the remaining class members, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer than 6 math courses? I would appreciate it if any1 can help with this.

2007-07-18 16:08:23 · 4 answers · asked by simbiat t 1 in Mathematics

When they have only drilled 7.5 miles deep into a 4000 mile diameter earth. Have only went 7000 feet deep into cave.How can this be taught as fact?

2007-07-18 16:04:08 · 9 answers · asked by sir wayne 4 in Earth Sciences & Geology

I'm talking about sunflower, olive, corn, etc... What causes these plants to create oil and can this function be amplified through genetic engineering? Could an oil be developed from the plant world which would augment our energy supplies in some manner?

2007-07-18 16:03:12 · 2 answers · asked by Anonymous in Botany

wondering if i should go to work tomorrow.

2007-07-18 16:01:44 · 3 answers · asked by Anonymous in Chemistry

Due to a tune-up, the efficiency of an automobile engine increases by 5.45%.

2007-07-18 15:59:23 · 2 answers · asked by adrianterrellhogan 1 in Physics

the equation is:

x^2-x-17=0

2007-07-18 15:58:20 · 5 answers · asked by B. 2 in Mathematics

a space heater, operating from a 120V line has a hot resistance of 14ohms. at what rate is electrical energy turned into heat, and how much will it cost to operate it for 6 hours at $0.13/kWh

2007-07-18 15:55:51 · 2 answers · asked by Kel 1 in Physics

1. How can you tell whe it is time to change it?
2. What is the approx. cost to build a new one in that size range? Is there a relationship for cost v. size?
3. How long does it take to build one these days? I hear that steel is hard to get beacuse of the chinese building lots of plants.
4. When is it easier and practical to rebuild one? What do they rebuild inside and why?

Thanks.

2007-07-18 15:53:39 · 5 answers · asked by SRH 1 in Engineering

My psychic aunt passed away and left me her crystal ball. It was her most prized possesion. We were very close. Anyway, one night I had friends over and after a few drinks we pulled it out to see if we could see anything. I swear to a stack of Bibles I saw 2 people - a guy and girl - just looking about. My other friends couldn't see them but I swear I watched them for at least 20 minutes. Is there anything to this stuff?

2007-07-18 15:53:06 · 10 answers · asked by Anonymous in Other - Alternative

27 - 5.3 -0.7 =

-5.2 - (-1.2) + 5.3 =

-3 x (-41) =






-17.5 - (-7.8) - (-1.2) =

-7.6 - (-1.6) + 3.3




fractions

16/6 + 16/7 - 18/4 =


3 1/3 + (-6 3/4) =



-2/3 - (-1/12) =



-5/6 + (-2/9)


5 2/3 + (-8 3/10) =


-2/3 - (-1/4) =


-2/9 + (-5/6) =

2007-07-18 15:51:44 · 3 answers · asked by Ghazala 2 in Mathematics

That has blond hair, green eyes, and white skin? This child is about 10 now so it's not changing.

I'm not racist, I'm just curious.

2007-07-18 15:49:52 · 19 answers · asked by Anonymous in Other - Science

How do you tell the difference between a linear differential equation and a nonlinear one? Thanks a lot.

2007-07-18 15:49:05 · 4 answers · asked by jimmycheesemaster 2 in Mathematics

2007-07-18 15:46:50 · 5 answers · asked by tiffany j 1 in Earth Sciences & Geology

When a 100 ohm resistor is connected to a battery, the terminal voltage is 30.6 V. When a 50 ohm resistor is connected the value is 29.4 V. What would the potential be with an open circuit at the terminals?

2007-07-18 15:45:12 · 6 answers · asked by Anonymous in Physics

2007-07-18 15:43:25 · 6 answers · asked by Louie R 1 in Weather

need help

2007-07-18 15:43:16 · 9 answers · asked by snyderman802000 1 in Mathematics

I know pain can cause the body to create dopamine...it would be nice if I could find a list, or at least a resource where I can find such info.

2007-07-18 15:43:14 · 1 answers · asked by Ferret 4 in Medicine

2007-07-18 15:41:47 · 17 answers · asked by Ron Rico 1 in Earth Sciences & Geology

2007-07-18 15:39:22 · 3 answers · asked by kaiser_willi 1 in Chemistry

what is/are the unique cell type that is used by organisms in the phylum Cnidaria for protection/trapping food?
and how this cell functions (detail)??

2007-07-18 15:38:04 · 4 answers · asked by FISH 1 in Biology

Initially, the translational rms speed of a molecule of an ideal gas is 460 m/s. The pressure and volume of this gas are kept constant, while the number of molecules is increased by a factor of 6.

2007-07-18 15:37:54 · 2 answers · asked by Anonymous in Physics

a book or website with past board exams and solved problems...

2007-07-18 15:36:30 · 3 answers · asked by chris 1 in Engineering

2007-07-18 15:36:11 · 4 answers · asked by Anonymous in Botany

When a platinum wire is heated in a bunsen burner flame, the platinum gets red hot, but returns to its original appearance on cooling. Has the platinum wire undergone physical change, chemical change, or both when heated?

2007-07-18 15:35:13 · 6 answers · asked by Anonymous in Chemistry