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The mass of the Moon can be found from a modified form of Kepler's third law of Planetary Motion.
You need to know the time taken for the Moon to orbit the Earth and the mass of the Earth.
Also you need the distance between the Moon and Earth.
Let the orbital period be P
Moon's mass = Mm
Earth's mass = ME
Distance apart = D
Gravitational Constant = G
Then: Mm + ME = (4pi2/G) x (D3/P2)
Note: That equation doesn't show up properly on some pages.
To clarify, it involves:
pi squared, D cubed and P squared.
Also, an artificial satellite orbiting the Moon can be used to find the Moon's mass by the same method:
mass of satellite (negligible) + mass of Moon = (4pi2/G) x (D3/P2)
D is now the distance of the satellite from the center of mass of the Moon and
P is the orbital period of the satellite.
What else can I help you with?
What phase of the moon was shown yesturday?
Without knowing the specific date, it is difficult to determine the phase of the moon shown yesterday. The phase of the moon changes each night, so you would need to provide the date in order to know the specific phase.
Explain how to calculate the position of the common centre of mass of the Earth-Moon system?
The distance from the center of mass to Earth, times the mass of the Earth, must be equal to the distance of the center of mass to the Moon, times the mass of the Moon. (For more than 2 objects, the calculation is somewhat more complicated - reading about "center of mass" can give you an idea.)The distance from the center of mass to Earth, times the mass of the Earth, must be equal to the distance of the center of mass to the Moon, times the mass of the Moon. (For more than 2 objects, the calculation is somewhat more complicated - reading about "center of mass" can give you an idea.)The distance from the center of mass to Earth, times the mass of the Earth, must be equal to the distance of the center of mass to the Moon, times the mass of the Moon. (For more than 2 objects, the calculation is somewhat more complicated - reading about "center of mass" can give you an idea.)The distance from the center of mass to Earth, times the mass of the Earth, must be equal to the distance of the center of mass to the Moon, times the mass of the Moon. (For more than 2 objects, the calculation is somewhat more complicated - reading about "center of mass" can give you an idea.)
Direction a compass point on the moon?
It would Align itself with the earth's megnetic field if the moon's core is solid (no one knows whats a few feet below the surface of the moon, we know alomost nothing about the moon), or if the moon's intearar is liguid then it most likely has a magnetic field and the compass would Align with that.
What is your sun sign and moon sign if your born on feb 3rd?
Ok your sun sign would be Gemini, the twins ask if you want to find out more about Gemini and if you want to know your moon sign i need to know your time of birth and if it was am or pm and your birth year. Or you could do it, go to Google and type in " What is my moon sign" and click on oone that's comes up, that's what i did.
If a helmet weighs 0.4 lbs on the moon how much is the mass in kg?
To find the mass in kg, you need to convert the weight from pounds to mass in kilograms using the conversion factor of 1 lb = 0.453592 kg. Therefore, a helmet that weighs 0.4 lbs on the moon would have a mass of approximately 0.181 kg.
What variable do you need to determine momentum?
You need to know an object's mass and velocity to determine its momentum. Momentum is calculated as the product of an object's mass and its velocity.
What are you things do you need to know about a substance to determine its density?
it's mass, and it's volume.
What two pieces of information about the metal do you need to determine its density?
To determine the density of a metal, you need to know its mass (in grams) and its volume (in cubic centimeters). Density is calculated by dividing the mass of the metal by its volume.
What must you know to determine which of two vehicles traveling at the same velocity has the greater momentum?
To determine which vehicle has the greater momentum, you need to know the mass of each vehicle. Momentum is defined as momentum = mass x velocity, so the vehicle with the greater mass will have the greater momentum. If the vehicles have the same mass, then they will have the same momentum.
What must you know to determine which two vehicles traveling at the same velocity has the greater momentum?
You need to know their mass. p=mv momentum=Mass times Velocity
What is need to determine atomic mass of chlorine?
To determine the atomic mass of chlorine, you need to know the relative abundance of its isotopes (chlorine-35 and chlorine-37) and their respective atomic masses. By using the weighted average of these isotopes based on their abundance, you can calculate the atomic mass of chlorine.
What do you need to know to determine momentum?
To find the momentum of an object you must know the mass of the object and the velocity at which it travels. Example: A 50kg man runs at 10m/s. What is his momentum? Momentum = Mass x Velocity 50 x 10 = 500 kgm/s
How can you determine volume and mass and density?
You need to know two of them - either from your own or other people's measurements. The third can then be determined using Density = Mass/Volume
What is the mass of the water inside of the container?
To determine the mass of water inside the container, you would need to know the volume of the water and its density. The mass can be calculated using the formula: mass = volume x density.
Do you need to know the individual masses of the samples of water and salt in order to measure the change in mass when the two samples are mixed?
No, you do not need to know the individual masses of the samples of water and salt to measure the change in mass when they are mixed. You can simply measure the mass of the mixture before and after mixing to determine the change in mass.
What tools do use to determine the volume and mass of a rock?
A measuring jug is all you need for the volume and a mass balance is needed to determine mass.
Which quantities do you need to know in order to determine the change in an objects momentum?
To determine the change in an object's momentum, you need to know the initial momentum of the object (mass x initial velocity) and the final momentum of the object (mass x final velocity). The change in momentum is equal to the final momentum minus the initial momentum.
