a current in a long straight wire carries a current of 2.0A. A second wire runs parallel to the first wire but is 3 cm about the first wire. what is the direction and magnitude of the current in the second wire that will just cancel the magnetic field created bu the first wire at a point 9 cm below the fire wire

The energy released by a nuclear fusion reaction is produced when

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere