Hello guys i have a question for you 1, scientists say that the mass of the earth is 5.97219×10^24 but how do they know this or how does they measure it? 2, scientists also measure the distance from the earth to the nearest star and say "that star has a length of 4 ly (light years) and again how did they measure the distance?🧐🧐🧐
Jan 28, 2021For the first one The mass of earth is measured indirectly by determining other quantities such as earth's density, gravity, or gravitational constant. For the second one they use the speed of light which is 186,000 mile per second and calculate how long it will take for the light to get to earth from the star then they put it in the form of light years for example the sun light takes 8 minutes and 20 seconds to get to earth which is 97,000,000 miles (150,000,000 kms) away so they concluded as the sun is 8 light minutes away from our mother planet
Jan 28, 2021Cldnt put it any better
Jan 29, 20212gnawn alawkm. 1gnaw gn ke gravity, Earth radius endihum density lay temesrto nw yeteseraw. Ya hulu Kilograms tekemachto 9.81ms½ yemilewn ameta. Be lela kuankua, ante 70 kg kehonk, 70kg be mehonih bcha ye rasih yehone gravity ynorhal. Gn betam tnsh slehone ~0 yderegal.
Jan 28, 20211. Newton'sUniversal gravitational law 2.ye light speed mn yahl dres kehede behula new object yemiyagegnew bemilew new
Jan 28, 2021I think they will give aproximate value by sujesting the mass of stones, water per area, the area b/n crust and Core etc all added together. Maybe by the principle the of gravity if you throw a stone in a hole you may sujest the depth of it and to space first by knowing the in space and the planet then you send something there space ship etc you may know or easily by how fast light reach there may be sunlight
Jan 28, 2021Kolet yakal
Jan 28, 2021U can measure using radiation 2 using light wave length shift, የመኪና ፍጥነት ሲለኩ አላየህም non contact measurement ነው
Jan 28, 2021Betnshu lasredak lmokr....ke wall ategeb shama yzek btkom more light wallulay yarfal ya malet u r closer and closer to z wall...on z other hand shamawn yizek berak kutr brhanu yikensal meaning u r far apart to it...endeza new lokebochm...depends on their light...ena math calculationnm alew .......
Jan 28, 2021Bakh yemilutn bemulu eshi blen slemnkebelachew new mikeldubn Mechem alamnachewm bendezi aynet case lay
Jan 28, 2021ante mititekemewin slk kemenm tenestew keseru yan silu eshi blo mekebel yshalal bakih
Jan 28, 2021Haymanot new ende eshi bye mekebelew
Jan 28, 2021