Which theory changed because of the evidence known as seafloor spreading? a. continental drift theory b. mid-atlantic ridge theory c. pangea theory d. theory of plate tectonics

The difference between atomic mass and molar mass

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments