A telescope has a focal length of 2000 mm. At what distance from the mirror will the image of an object 5 m from the telescope appear?

What’s #16 asking and how do i solve it?

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

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge