Apassenger train travels west at high speed. one passenger is located at the east side of one car, another is located in the west side of that car. in the train's frame, these two passengers glance up at-the same time. in the earth's frame, the passenger at the west side glances up first. the passenger at the east side glances up first. they glance up simultaneously. the passengers glance sideways.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

Wind or electric energy force force of friction

Go to the bathroom and vape