Which of the following hypotheses is formed correctly? A. All of these
B. I predict that many species of bird eat worms.
C. If the amount of carbon dioxide in the atmosphere is increased, then the global average temperature will increase.
D. The combustion reaction of gasoline makes a car run.

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.