2006-06-05 18:47:26 · 3 answers · asked by liverpool_1205 1 in Science & Mathematics ➔ Earth Sciences & Geology
density=mass/volume or something like that, so if u have the density and the volume (aproximations ofcourse) u can find the mass
i think! lol
2006-06-05 18:51:10 · answer #1 · answered by Anonymous · 1⤊ 0⤋
You need to know three things: the gravitational constant (G=6.67x10^-11 m^3/kg.s^2), the radius of the Earth (r=6371 km), and the acceleration of gravity at the surface (g=9.81 m/s^2).
Gravitational acceleration for a small mass is GM/r^2, where M is the mass of the attracting body (Earth, in this case). So g = GM/r^2, solve for M:
M=g*r^2/G = 5.97 x 10^24 kg.
2006-06-05 21:01:02 · answer #2 · answered by injanier 7 · 0⤊ 0⤋
Basically, the distance from Earth to the sun can be measured by triangulation. The mass of the earth depends on how far away Earth is from the sun and how fast it orbits around it.
2006-06-05 18:51:49 · answer #3 · answered by Scozbo 5 · 0⤊ 0⤋