Energy from the sun arrives at the top of the earth’s atmosphere with an intensity of 1.30kw/m21.30⁢kw/m2. how long does it take for 1.8×109j1.8×109j to arrive on an area of 1.00m21.00⁢m2?

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.