A rectangular billboard in space has the dimensions 10 meters by 20 meters. How fast and in what direction with respect to the billboard would a space traveler have to pass for the billboard to appear square?

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

there are no components of a physical goal mentioned on the list of choices that you've provided.

answergravity;

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.