Mars Definition and 506 Threads

I am curious how easily my theory can be disproven... I have never heard anyone mention it, and as well I have no knowledge to support it. I was daydreaming of what would cause a planet simular to ours, to lose all of its elemental resources. It could be the fact that I am reading a book on...

Homework Statement In class, we use the CGS system, so I do all my work in cgs units and then convert at the end. The mean distance of Mars from the sun is 2.3 * 10^13cm 1 arcsecond = (1/60) of (1/60) of 1 degree, = 1/3600th degree Let d = distance of 1 parsec The Attempt at a Solution...

Homework Statement The problem is to find what 150lbs on Earth = Xlbs on mars. Homework Equations F=G(m1)m2/d^2 G = 6.67x10^-11 (obviously) The Attempt at a Solution I'm getting incredibly annoyed because he gave us the wrong units etc, and we didn't even go over this in class...

Here is my super rough starting estimate. 1000 tons to LEO for the total program. At SpaceX costs of $10,000/Kg that would be $10 billion for launch services. Let's say $10 billion for fabrication and $10 billion for ground facilities and $30 billion for salaries. So we have a total of $60...

Homework Statement gravitational constant G=6.67x10^-11 Nm^2/Kg^2, M=6.42x10^23 Kg, and R=3.40x10^6 m for mars. Calculate the atmospheric density of Mars. Homework Equations Density of water = 1000 Kg/m^3 Atmospheric pressure = 30 Pa (from what I've calculated) p=M/V The Attempt at a...

I'm skeptical of "proof" of past life on Mars as as result of rocks found on Earth. I'm skeptical of "proof" of past life on Mars as a result of rocks found on Earth. http://www.digitaljournal.com/article/285660" Wouldn't real proof be found on the planet? I thought these Martian...

1. A tennis ball on Mars, where the acceleration due to gravity is .379g and air resistance is negligible, is hit directly upward and returns to the same level 8.5 s later. (a) How high above its original point did the ball go? (b) How fast was it moving just after being hit? 2. v (y)=...

i have watched inside.planet.earth.2009.avi Applying the film, If the core of the planet cools, the planet is dying, because it disappears EM field that protects the planet. On Mars there is a huge volcano(According to scientists, the largest in the solar system.) which was derived its...

Homework Statement A 2700 kg spacecraft is in a circular orbit 1000 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4000 km above the surface? mars: Mass=6.4185*10^23 KG, radius=3397000 m Homework...

I understand that liquid water cannot exists on Mars for extended periods of time because: a) The atmosphere is too thin b) Resulting in a lower boiling point water c) Which leads to sublimification of solid ice into gaseous vapour Quite specifically, I would like to understand the...

Homework Statement Estimate the temperature of Mars. Assume Mars acts as a perfect blackbody and the only heat input comes from the Sun (use necessary values from appendix) Homework Equations The Attempt at a Solution I was doing so well until I got to this question on my...

Is there or was there any life on Mars in the past? Do you think so? I personally don't. I think that martian meteorite got contaminated with Earth life.

Scientist says that gravity on Mars is around 38% compare to Earth. Is they proof this merely by caculation? I not sure whether scientist really land any space mechanic/machine on Mars, if yes, can someone provide me the information? Your help is much appreaciate, thanks :)

Hallo, i have a question here, hope someone can answer it. :) As we know, two object attract each other. The closer the object, the stronger the force of attraction. This explain why Earth is attract by sun, but moon is attract by earth. (i guess.) But here i got a question, we know that...

Homework Statement a robot probe drops a camara off the rim of a 239 m high cliff on mars, where the freefall acceleration is -3.7 m/s^2. a. fiind the velocity wl which the camara hits the ground. b. find the tiime required for it to hit the ground. Homework Equations vf^2= vi^2+2ad...

Homework Statement The mean radius for the orbit of the planet Mars about the sun is 2.28 * 1011m. If the radius of the orbit of the Earth around the sun is 1.49 * 1011m. If it takes the Earth 1 year (365 days) to orbit the sun, how long (in Earth days) is the year on mars? So this is the...

What is the weight in Newtons of a 80.6 kg astronaut on Mars where the acceleration due to gravity is 3.70 m/s^2. Give answer with 3 sig figs only Could I just use a ratio? Like 9.8/80.6 is equal to 3.7/? or is that over simplifying the problem?

Homework Statement Given data: A moon of Mars orbits with a period of 459 minutes. The radius of the moon's orbit is 9.4x10^6 m. What is the mass of mars? Homework Equations The Attempt at a Solution The only relevant equation I could find was Fmars on moon= (G*m1*m2)/(r2)...

http://scienceblogs.com/catdynamics/2009/09/water_water_everywhere.php Nasa press release from 24 September. http://marsprogram.jpl.nasa.gov/mro/newsroom/pressreleases/20090924a.html Photos of fresh meteorite craters show white at estimated depths of 1 - 3 meters. The white material goes away...

Hey guys, With that rumor around the internet that Mars will look as big as the moon, i was wondering how far the Mars would be from the Earth for it to really look that big. show an equation that shows the distance from Earth to Mars where Mars would have the same diameter as the moon, when...

Well I must admit, when it comes to magnets I haven't a clue. I know that Mars has no magnetosphere and it's why it has such a thin atmosphere. The Earth's magnetosphere, if I understand right, is not very strong, but the Earth is a rather large magnet, so it's affect on solar wind extends far...

Mars Mission -- an act of Lunacy or Science? 1) 6 Month travel to Mars in tiny capsule. Currently, a NASA capsule Stinks inside of Vomit, Feces and URINE. Capsules are noisy Shower consists of moist rag Drink recycled urine No Gravity -- (You will squish by Mars gravity) Nothing to do...

In Gulliver's Travels Jonathan Swift described the two moons of Mars, Phobos and Deimos, giving their exact size and speeds of rotation. He did this more than 100 years before either moon was discovered. granted this is true - how would one even predict such a thing?

I'm having trouble putting my head around this , and i was hoping someone could help me out with this. i heard with our current technology they are saying that it is going to take six months to get to mars. What I want to know is how fast would a spaceship have to be going in order to get...

If one were to be found, would it be a planet?

There is an Asteroid Belt between Mars and Jupiter. I have a few questions about it. Where does it start and end (Radius from the Sun)? Also, the Right Ascensions and Declinations of the extents of the belt or if it is continuous around the sun? I know that some of the larger asteroids...

I just received an email with a powerpoint someone put together. It said that Mars would come within 35,000,000 miles of Earth on August 27th and would appear as large as the Moon. Does anyone have any other information on this? Is it even true?

Homework Statement You are working on a project with NASA to launch a rocket to Mars, with the rocket blasting off from Earth when Earth and Mars are just aligned along a straight line from the sun. As a first step in doing the calculation, assume circular orbits for both planets. If Mars is...

I was wondering what kind of things you would need to transmit to a satellite or something on Mars and get video and whatever other signals back from there. Like transmit controls there for a rover to take and possibly to bring it back. So for the journey there and back.

The next frontier: MARS! Ok, so the moon would probably be good too, but I want to talk about what kind of people NASA would want to send to Mars. In Heinlein's Stranger in a Strange Land, the optimal explorers are four married couples with varied expertise including: an astrogator...

Hi, I am wondering why is it so important to put people on Mars? It is very dangerous and Nasa does not have the technology to do this safely without endangering lives. Why can't they wait for proper technology to do it correctly? In my opinion you need similar to following; 1) ability to...

Hi. I've been searching the internet for images that the Mars rovers may have taken of either Phobos or Deimos from the surface of Mars, preferable in the daylight. I'm just curious to see that. I would think that the astronomers would have tried to capture such a sight. All I've found are...

Is there actualy any hi-res footage made with MARS rover?? All I see are computer animations, photos and low-res low-fps black&white clips. Can anyone point to some link where any Mars rover recorded a hi-res video?

Homework Statement Mars travels around the Sun in 1.88 (Earth) years, in an approximately circular orbit with a radius of 2.28 x 10^8 km Determine a) the orbital speed of Mars (relative to the Sun) b) the mass of the Sun Homework Equations acceleration centripetal = 4(pi^2)(r) /...

I've found this site that states: "The surface gravity on Mars is only about 38% of the surface gravity on Earth." So a 100 lbs object will weigh about 38 lbs or a 45.359 kg will be on Mars 17.237 kg (converting 38 lbs in kg). So to find the Fg of Mars, I did this kind of equation...

Homework Statement Homework Equations From Wikipedia: E = the sidereal period of Earth (a sidereal year, not the same as a tropical year) P = the sidereal period of the other planet S = the synodic period of the other planet (as seen from Earth) The Attempt at a...

Hai everybody! Could there be Life on Mars ?Are there any chances that the martians could be living. Once a report was published stating that a female was seen on the Mars,is that true ? Another report came stating that Water is found in the rocks as crystallized water. Can we...

http://www.nasa.gov/mission_pages/mars/news/marsmethane.html NASA reports evidence of methane in the Martian atmosphere. There are several ways to explain the methane - Methane trapped in pockets in the bedrock being released Methane being created at greater depths by geochemical...

I hated to let this one go without a post. There is already a post in Astronomy linking to the video. https://www.physicsforums.com/showthread.php?p=2035686#post2035686...

https://www.youtube.com/watch?v=http://www.youtube.com/watch?v=R2leVWAE3ck Wow! I didn't know the 2nd rover landed a week after. Ha, invasion of Mars!

Homework Statement A 250-kg space probe weighs 935 N on the surface of Mars. What is the gravitational field strength on the surface of Mars? Homework Equations W=mg g=Gm1/r^2 Fg=Gm1m2/r^2 The Attempt at a Solution Okay, so at first I thought it would be...

Homework Statement Mars orbits the sun at 1.52 Earth's orbital radius. What is the period of Mars in Earth years? Homework Equations ΣFc = mac The Attempt at a Solution I am unsure how to do this problem as this is the first "orbital period" question that I have encountered. Do I...

Homework Statement You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. The pressure at the surface of the water will be 145 kPa , and the depth of the water will be 14.2m...

Homework Statement A Hohman transfer is an orbit that takes a rocket from Earth to Mars in the manner as shown by the figure below, with the minimum amount of rocket fuel expended. The rocket fires its engine so that its velocity lies tangential to the orbit of the Earth (A). It then shuts...

Homework Statement The Radius of Mars is R_m its mass is m The radius of Mars (from the center to just above the atmosphere) is R_m and its mass is m. An object is launched from just above the atmosphere of mars. A) what is the object's initial velocity if its final velocity is V_f Homework...

Why is the density of Mercury 40% larger than the density of Mars?

Homework Statement An astronaut on Mars drops a rock straight downward from a height of 0.90 m. If the acceleration of gravity on Mars is 3.73 m/s2, what is the speed of the rock when it lands? find m/s The Attempt at a Solution .90m/3.73m/s2=.2413 squareroot .2413=.491...

Didn't know where to put this, so GD for now. The Phoenix project team appear to be preparing to announce something more exciting than the mere presence of water on Mars...

Researchers think they have found traces of ammonia in Mars' athmosphere. Since ammonia is degraded quickly there, if this were true, it would mean the presence of some ammonia-producing source on Mars. THe best bets for that would be either active volcanoes or microbes, but since active...

Homework Statement Mars's orbit has a diameter 1.52 times that of Earth's orbit. How long does it take Mars to orbit the Sun? in years. Homework Equations I tried using T^2=4(pi)^2r^3/GM I got 1.88years...but its wrong... The Attempt at a Solution