Science & Mathematics - 25 November 2007

I dont know much about astronomy or archeology, but upon just looking at various images of the "face" and pyramidal structures on Mars and comparing them with similar structures on Earth, the objects on Mars definately seem to warrant full investigation! (To say nothing about images that appear to be glass/metallic tunnels and possibly even crashed aircraft of some kind (I'm a pretty harsh critic, and I had a rough time explaining that one!) What do you think about these things? (U can use most search engines to look at any of these things!)

2007-11-25 04:57:36 · 13 answers · asked by j_evryday84 1 in Astronomy & Space

just wonderin because ive never seen snow

2007-11-25 04:55:14 · 3 answers · asked by Olivia M 1 in Weather

A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. It is given that a particular small car, with a mass of 1050 kg, can accelerate on a level road from rest to 22 m/s (79.2 km/h) in 14.0 s. Using this data, calculate the maximum steepness of a hill.

2007-11-25 04:52:28 · 2 answers · asked by se.berk 1 in Physics

(a) Calculate the energy required to raise the temperature of 140.0 g Ag from 273 K to 295 K.
J

(b) Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0°C (called the molar heat capacity of silver).
J/mol°C


(c) It takes 1.35 kJ of energy to heat a sample of pure silver from 12.0°C to 15.7°C. Calculate the mass of the sample of silver.
g

2007-11-25 04:48:30 · 2 answers · asked by Anonymous in Chemistry

i am a wrestler who loves muay thai , kick boxing and Brazillian Jiu Jitsu and im 11 weeks preggy
do you think if i keep practsing these sports i will have an natural abortion or i need to find an other way to do it because wrestling wont solve my problem?

thanks in advance

2007-11-25 04:45:04 · 14 answers · asked by Anonymous in Medicine

Just wondering

2007-11-25 04:44:55 · 27 answers · asked by Dicky 1 in Physics

can some1 describe the functioning of amplifiers briefly? what are the differences b/w an inverting & non-inverting amplifier besides dat of input aplied on diferent terminals?
what is open loop gain?
plzzz help...i need all this info badly.

2007-11-25 04:41:50 · 3 answers · asked by pearl 1 in Physics

2007-11-25 04:41:21 · 13 answers · asked by foxfoxcar 1 in Astronomy & Space

2007-11-25 04:41:07 · 2 answers · asked by Anonymous in Mathematics

A Boeing 727 jet is flying due east at 500 mph in still air. A 70 mph tail wind approaches in the direction 60 degree north of east. What adjustment does a pilot have to make to keep the plane due est initial direction?

2007-11-25 04:39:52 · 2 answers · asked by Anonymous in Mathematics

The numerical expression 4 + 4/4 -4 uses four 4's and has a value of 1. find numerical expressions using ONLY four 4's that have the values of each integer from 2 to 10. You may use any operations and grouping symbols.

I got 2,3,5,6,7,8,9 I CANT GET 10 or 4!!!!! please please help me.

2007-11-25 04:38:11 · 4 answers · asked by California<3 2 in Mathematics

1] Why is it so important to test cosmetics to make sure they are safe for humans?
2]What are the reasons FOR animal testing?
3]What are the reasons AGAINST animal testing?

2007-11-25 04:37:48 · 2 answers · asked by ashley 3 in Biology

Please can anyone help me. I have to make a 3-D cell and I need to know the colour.

2007-11-25 04:34:49 · 5 answers · asked by Anonymous in Biology

Since I founded the system, (As far as I know), I get to describe the charact6eristics of this new sun sign and the people who now belong to it.
Ophiuchus is a chararter of uncertain origin, but a common theme is that the person of original myth was a decent, honest fellow, and a healer. (Gosh, I wonder if the Caduceus is related to this.)
Anyway, Ophiuchus is shown slaying (or fighting with) the serpent, with the head in one hand and the tail in the other. The head is superstition and the tail is ignorance. Ophiuchans are truth-seekers. They are natural born learners and teachers. They are skeptics who demand evidence and challenge extraordinary claims. Consequently, they are people who would reject all such nonsense, so Ophiuchus will, by its own description, be somewhat of an orphan sign.

2007-11-25 04:34:23 · 5 answers · asked by Brant 7 in Astronomy & Space

The temperature of the balloon is increased to 38.0°C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The molar heat capacity for helium gas is 20.8 J/°C·mol.)

2007-11-25 04:33:28 · 2 answers · asked by Anonymous in Chemistry

2007-11-25 04:33:02 · 3 answers · asked by Anonymous in Earth Sciences & Geology

A magician attempts to catch a bullet with his teeth. The mass of the bullet is 15 grams and its initial speed is 200 m/s as it leaves the gun.

1. Calculate the final speed of the combined mass of his skull (6 kg) and the bullet, assuming that his head starts from rest.

2. If his head acquires this new speed in a movement of 5 cm, calculate the acceleration that his head must undergo in g's.

My answers:

1. .499 m/s

2. Acceleration comes out to (-2.49 m/s^2) which is equal to .2541 g's.

Am I right? Thanks.

2007-11-25 04:32:29 · 1 answers · asked by labelapark 6 in Physics

stimuli cease

2007-11-25 04:32:22 · 2 answers · asked by Anonymous in Biology

If you were to light a match inside of Jupiter's Atmosphere would the planet go up in flames?

Is Jupiter basically a failed star?

2007-11-25 04:30:28 · 6 answers · asked by Jansen J 4 in Astronomy & Space

how do I go about doing this problem step by step. I am having no luck working this type of problem. thanks for your help.

2007-11-25 04:30:20 · 14 answers · asked by blue_eyed_woman_23 3 in Mathematics

A 2.30 x 10^2-N force is pulling an 85.0-kg refrigerator across a horizontal surface. The force acts at an angle of 24.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 5.00 m. Find: (a) the work done by the pulling force, and
(b) the work done by the kinetic frictional force.

2007-11-25 04:29:39 · 1 answers · asked by Anonymous in Physics

2007-11-25 04:28:55 · 6 answers · asked by PT109 1 in Astronomy & Space

Sound is supposed to travel faster in less dense mediums of the same state of matter. Saltwater is more dense than freshwater, yet sound travels faster in saltwater. Why?

2007-11-25 04:28:51 · 1 answers · asked by Blue Raspberry 2 in Other - Science

What is the magnitude of this acceleration in km/seconds squared?.

Thanks. any help is appreciatied.

2007-11-25 04:28:38 · 1 answers · asked by ... :) 2 in Physics

Bored office discussion: What is a nutshell made of? One of us says technically, it's WOOD, while another says a nutshell is its own unique material. And not only peanut shells, but really hard shells like walnuts and pecans. Wood, or not wood? Discuss.

2007-11-25 04:27:45 · 4 answers · asked by DM J 1 in Botany

1.weak and the vapor pressure is low
2.weak and the vapor pressure is high
3.strong and the vapor pressure is low
4.strong and the vapor pressure is high

2007-11-25 04:24:16 · 3 answers · asked by Q+A 22 3 in Chemistry

cheek cells: shape? cell arrangement? location of nucleus?

fat cells: shape? identify large reddish sphere. location of nucleus?why is it located there?

differentiate white blood cells with red blood cells accdg. to: size, shape, nucleus, organelles, functions.

differentiate frog blood cells with human blood cells accdg. to: size, shape, nucleus, organelles, functions

smooth muscle cells: shape? structure? location of nucleus?

columnar cells: structure of cells? arrangement? location of nucleus? surface modification present? purpose of this modification?

2007-11-25 04:23:52 · 1 answers · asked by k.secretalias 2 in Biology

x^2-6x+4>0 I know the multiplying factor is 4 and the adding factor is -6 but I don't know where to go from there.

9x^2-6x-4<0 I know the multiplying factor is -36 and adding factor is -6 where would I go from there b/c nothing I seem to try will go with those numbers. 8*(

Please Help!!!

2007-11-25 04:20:28 · 4 answers · asked by Jennifer G 1 in Mathematics

I heard earlier that scientists theorise that because of the electrical currents in a computer that there is a miniture black hole in there. I find this an odd thing to try and believe, could anyone give me some sort of reasoning behind this claim since scientists don't even know what a black hole is.

2007-11-25 04:18:11 · 9 answers · asked by Anonymous in Astronomy & Space

2007-11-25 04:11:29 · 1 answers · asked by nicknick 1 in Biology