What to forces keep things in orbit

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Why do astronauts in the space shuttle weigh less?

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels. the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause, directly and indirectly, for such a rise in sea level is