Answers: 1
Physics, 22.06.2019 11:50
The mass of the sun is 1.99Γ1030kg and its distance to the earth is 1.50Γ1011m. what is the gravitational force of the sun on the earth?
Answers: 3
Physics, 22.06.2019 13:10
The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 Γ 1013 rad/s. the mass of a nickel atom is 9.75 Γ 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 Γ 10-34 j β’ s, , 1 ev = 1.60 Γ 10-19 j)
Answers: 2
Physics, 23.06.2019 01:40
The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? donβt forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?
Answers: 1
Physics, 23.06.2019 08:30
Hi , i am new here can anyone me out with this question why is space black after having so many shining objects like sun , moon , stars
Answers: 3
a mango on a tree possesses potential energy, when falling the potential energy is converted to kine...
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