Aspace station sounds an alert signal at time intervals of 1.80 h . spaceships a and b pass the station, both moving at 0.400c0 relative to the station but in opposite directions. part a how long is the time interval between signals according to an observer on a? express your answer in hours. δtaδ t a = nothing h request answer part b how long is the time interval between signals according to an observer on b? express your answer in hours. δtbδ t b = nothing h request answer part c at what speed must a move relative to the station in order to measure a time interval of 3.60 h between signals? express your answer in terms of c0. vav a = nothing.

Where is the diagram? you need to be more specific in your question so we can you

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.

The speed was not exceeded so it was slow

Because the sun is the biggest and if the sun orbits the earth we will be dead probably