How do you find relief on a topographic map?

What is the full meaning of rfid on computer

Which of the following terms describes the layers of air surrounding the earth ?

Will give brainliest asaapppppppppppp plz im in a major hurry to finish which of these pairs of objects exerts the greatest gravitational force on each other? object 1 and object 3 object 4 and object 3 object 1 and object 4 object 4 and object 2