A penny is thrown from the top of the Empire State Building . It hits a pedestrian on the side walk 8 seconds later how high is the Empire State ?

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Idon’t quite understand this problem

Hey student studies gravity using objects that have the same mass which two objects have the greatest gravitational force acting between them a. 100kg 1.0m 100kg b. 100kg 2.0m 100kg c. 100kg 2.0m 100kg big d. 100kg big 3.0m 100kg big