Moon Definition and 1000 Threads

[SOLVED] Ratio of net gravitational pull on moon A new moon is almost exactly in line between the Earth and the sun. A full moon is on the opposite side of the Earth from the sun. What is the ratio of the net gravitational force on the moon when it is new to when it is full? I tried...

Homework Statement on the moon the acceleration of gravity = g/6 if a pendulum has a period T on Earth what will its period be on the moon Homework Equations T = 2 pi sqrt(l/g) The Attempt at a Solution do you get... T / sqrt(6

Based on my title, I have the following questions: 1) What are all the challenges for man to go on the moon? 2) What are all the challenges for man to go on the Mars planet? I am mostly interested in what speed, what direction the shuttle is launched at? How much fuel is used in this...

[SOLVED] Gravitation & Escape Speed - Stone leaving Earth and reached the Moon. Hello everyone, I have one question on gravitation and escape speed. In the earlier part of the question, the minimum speed for the stone to leave the Earth is calculated and its final destination is the Moon...

Finding altitude on the moon (urgent) Homework Statement A projectile is launched vertically from the surface of the Moon with an initial speed of 1700 m/s. At what altitude is the projectile's speed 27% of its initial value? Homework Equations Kinematics, Conservation of energy...

Hi, I have recently been reading that the currently favoured theory for the origin of the moon is that a Mars sized object smashed into an almost finished earth, ripped off large parts of proto-Earth's mantle and the result debris coallesced into the Earth and moon again. I know the...

If the gravitational field strenght is weaker than that of earth, then less force is required to do a certain amount of work than required on earth. So my question is, Would our movements be faster? Like dribbling and hand movements and running?

Homework Statement The gravitational attraction of the Sun and Moon on the Earth produces tides. The Sun's tidal effect is about half as great as the Moon's. The direct pull of the Sun on the Earth, however, is about 175 times that of the Moon. Why is it that the Moon causes larger tides...

OK...this is a silly question, but it was something I was wondering about since I saw it a week or so ago. Let me just preface this with that I live in Michigan, USA. I do not know the co-ordinates of the area, but I assume that is enough information to answer this remedial question...

http://news.bbc.co.uk/2/hi/science/nature/7131937.stm

[SOLVED] Acceleration of Guns firing on Moon and Earth Problem--HELP! sorry accidentally created this

Homework Statement How would F(g) and (delta) X change if the Spring experiment was done on the moon where the gravitational acceleration is six times smaller than on earth? Homework Equations F(g) = (delta) mg F(s) = k(delta) X The Attempt at a Solution I would think that F(g)...

A pendulum clock that works perfectly on Earth is taken to the moon where g = 1.63 m/s^2. If the clock is started at 12:00 A.M., what will it read on the moon 24 Earth hours? The equation you would probably use is T = 2(pi)(sq. root of m/k) Can someone get me started?

I don't know much about Astronomy or physics. But I am researching to write a fantasy book set in a historical age where Earth has 2 moons and in a sub-plot one is hit by an asteroid and destroyed. We know what the effect of an asteroid hitting Earth is. What about it hitting the moon, a...

First- I definitely believe we landed on the moon. But is there any real evidence? Pictures, rocks, and huge, expensive shuttles aren't conclusive evidence, are they? David

I had a vivid nightmare the other night where I went outside in broad daylight and saw that the moon was not only visible but also enormous. I saw people running around in a state of panic and asked one of them what was going on. He told me a large asteroid had struck the moon on the side...

Hi all, I'm looking for a way to calculate how much light is reflected from the surface, on the moon, and whether that light would be strong enough to be classed as a bright light source. I have no idea where to start with this, but basically I'm trying to prove a Lunar Hoax Conspiracy...

I don't know too much about astronomy, so my question may seem like a dumb one to you guys. I heard that its been speculated that the Earth's moon has lunar ice. if it does, then it has water, which is a necessary component for a planet or moon to sustain life, just like if Mars had water, it...

Assume that the Earth and the moon have circular orbits (which is almost true) and that the periods of their orbits are 365 and 28.0 , respectively. How much work does the Earth do on the moon in one day? How much work does the sun do on the Earth in one month? Im totally lost on this...

My friends and I are talking about this question.From the point of my view,I do not think that man-made nuclear weapons can destory the moon! But one of my friends insist that man-made nuclear weapons can do that job!what is your opinion...

...was destroyed by an asteroid which was destined for Earth? Where would that leave Earth? What would happen to Earth orbit? Rotation?

I searched the net for the distance between the Earth and the moon in m, but different sites give me different answers. What is the distance between the Earth and the moon in metres?

Homework Statement I've been stuck on this problem for a while now, and have tried it several different ways, but with no results. I'm sure I'm missing something obvious or simply approaching it from the wrong direction. The moon subtends an angle of 0.5 degrees at the objective lens of a...

Homework Statement How long would it take a laser beam to go to the Moon and back if the distance to the Moon is 3.8 x 10^8m? Homework Equations a=2d/t^2 d=v1 t + 1/2a t^2 The Attempt at a Solution a=2d/t^2 9.8m/s(Gravity)=2(7.6x10^8)/t^2 t^2=15.2x10^8/9.8 t= 12453.99698 secs...

If the moon was to be stopped, what would its velocity be just before hitting the earth? Also, if you could throw in the force of the impact, that would be great too. And another thing, how long would it take?

1. The Moon and Earth are bound together by gravity. If, instead, the force of attraction were the result of each having a charge of the same magnitude but opposite in sign, find the quantity of charge that would have to be placed on each to produce the required force. 2. Fe = ke...

Dear Mr. Gates: My computer has enough flops to count every man woman and child on the face of the Earth in the time it takes my heart to beat twice. Why oh why then, is a simple operation like deleting a shortcut such an incredibly time- and resource-consuming task? It takes, like, 30...

I was recently listening to a favorite podcast of mine (AstronomyCast) and they went over the tidal effects the moon's gravity has on the Earth. I just happened to be thinking about the tidal effects after that and was wondering if the moon's gravity effects things in orbit of Earth. More...

For a while I've been wondering why the moon looks so big on the horizon. I looked around the web and found 2 answers: 1) At the horizon the brain thinks that it's very far way compared to when it's above your head in the sky, but since they're really the same size in both places the brain...

Hi everyone! Ok, so here's the problem: What would be the weight of the Earth if it were on the moon (just try and imagian that :). The masses of the moon and the earth, and their radiuses, are given. I cannot see what's the trick here. There are four possible options. The one that seemed...

I had no idea it took a month for the moon to orbit the earth. I thought it happened daily, and that's what gave us night. How do we get night?

Period of rotation and revolution of moon is same (w.r.t. distant star), that's why we can only view only one face of the moon. Cosmological fact or reasonable science?

A couple years ago it was typical to see in articles, and to hear in conferences, specially when discussing about the hierarchy or about meeting of the coupling constants at GUT scale, of some other examples of misleading coincidences. The most prolific example was the coincidence between the...

Homework Statement There exists a distance x between the Earth and the moon where the net gravitational force acting on an arbitrary particle of mass m is zero. Assuming only earth-moon interaction, show the distance is given by: Homework Equations x = dem/(sqrt(Mm/Me) + 1) where...

From NewScientists 23 june 2007 "RealityCheck": [...] <<What they found(*) is that Leggett's formula is violated as well: even if you allow for instantaneous influences, quantum measurements do not fit with the idea of an objective reality. This is surprising because you might expect that...

Homework Statement For the same initial upward velocities, how many times higher will an object travel above the lunar surface (g=1.6 m/s^2) than above the surface of Earth? Assume air resistance is negligible. Homework Equations delta Y = v1y^2 X 10^2 + 1/2 X 9.8 m/s^2 X (10)^2 The...

Physics Question Applying the standard physics definition of 'spin'...If one were to take a black permanent marker and draw circles of various size in various places on the top surface of a white frisbee and throw it, would the mass inside each of those individual circles be experiencing it's...

Hi all, I've just read that the last full moon (29/6) was noted as the moon was lowest in the year. So there can be the full-moon when the moon can be the highest. Is that around Sep23 (equinox) or Dec22 (solstice)? Thanks.

does anyone know how to answer this problem? A spaceship ferrying workers to Moon Base I takes a straight-line path from the Earth to the moon, a distance of 384,000 km. Suppose it accelerates at an acceleration 20.6 for the first time interval 16.0 of the trip, then travels at constant speed...

I'm going nuts trying to figure this out... in textbooks and online, everything i read says that the moon and Earth have a much stronger gravitational force between them than the sun and the earth, and this is why the moon has greater effect on tides than the sun. They all say that this is...

can someone explain to me in simple language why does not Moon fall on the Earth? I don't understand it why? please don't give me wikipedia link or something like this http://www.teachersdomain.org/resources/ess05/sci/ess/eiu/moonorbit/index.html wich I find wery funny thanks

I know that the moon is receding away from the Earth at about 3.8cm per year as a result of tidal torques exerted by the Earth on the moon. Will this change the length of the year,if so how do I calculate the estimated change as a result of this.

Hello everyone, I was wondering where I could get complete ecliptic longitude/latitude data over the course of as many years as possible of the Sun and Moon. Of course, by definition the ecliptic latitude of the Sun would be zero. The equatorial coordinates would be fine. Thank you for...

does the moon pull on the Earth with one-sixth the force that the Earth exerts on the moon?

I know the following statement to be true, being proven both mathematically, and verified by astronomical observations. What I need help understanding is HOW. . . "The law of Conservation of Angular Momentum requires that the slowing down of the rotation of the Earth around its axis caused...

In traveling to the Moon, astronauts aboard the Apollo spacecraft put themselves into a slow rotation to distribute the Sun's energy evenly. At tje start of their trip, they accelerated from no rotation to 1.0 revolution per minute during a 12-min time interval. The space-craft can be thought...

What is the light that you are seeing when you look at a crescent moon but you can still see the dark side faintly? thanks

I'm trying to estimate the ratio of the flux of sunlight to moonlight (at full moon). What I'm interested in is if I'm doing the physics right. I know what the solar flux is at the surface of the Earth (actually, just outside the atmosphere): roughly 1400 Watts/m^2. I can actually calculate that...

Here is the scheme: A craft from Earth slingshots around the moon back towards the earth, gaining some speed (and slowing the moons orbit slightly). a few days later it expends this energy skimming the Earth's atmosphere, scooping some atmosphere into its tanks. It heads back towards the moon...

A. How much energy must a 450.Kg cow expend in jumping over the moon?(excluding the moon's gravity and the Earth's atmosphere), B. Assuming all the work is done during the jump itself, what would her initial velocity have to be? C. What would her final velocity be upon her return to Earth...