Which positive result could develop if carbon dioxide increases in the atmosphere? a. people breathe carbon dioxide, so earth could support more human life. b. plants give off carbon dioxide, so an increase in plant life could decrease world hunger. c. carbon dioxide will protect people from the sun's radiation. d. carbon dioxide will create more sunny weather, which is good for plant growth.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.