Why does a geostationary satellite must orbit the earth in 1 sidereal day rather than 1 solar day?

When a chemical spill has occurred on your clothes you should 1. scream for 2. run under the shower and turn it on 3. use the eye wash station 4. grab the first aid kit

Niles eldredge and stephen jay gould researched the lenses of the eyes of fossil trilobites of different species. in 1972 they published a paper in which they described the tendency of a species to remain the same until a sudden change in the environment causes a new related species to appear. which hypothesis was most challenged by the work of eldredge and gould?

Name any 3 methods of irrigation and briefly describe them.