Velocity includes direction, for instance going 140 MPH is speed but going 140 MPH North is velocity
At night, when that part of Earth is facing away from the Sun<span>, </span>space<span> looks </span>black<span>because there is no nearby bright source of light, like the </span>Sun<span>, to be scattered. </span>If<span> you were on the Moon, which has no atmosphere, the sky would be </span>black<span> both night and day.</span>
Hello again!
The energy levels of an atom can be classified as follows:
First level-2 electrons
Second level-8 electrons
Third level-18 electrons
Fourth level-32 electrons
If an atom has 3 electrons, 2 of them will be in the 1st energy level making the 3rd one be on the 2nd energy level. Good luck with your homework!
Answer:
Vận tốc pháp tuyến tỉ lệ với vận tốc góc nhân với bán kính r. T T T là chu kỳ, ω là vận tốc góc và f là tần số. Chu kì tỉ lệ nghịch với vận tốc góc nhân với hệ số 2 π 2 \ pi 2π và tỉ lệ nghịch với tần số.