Radio astronomers detect electromagnetic radiation at 50.0 mhz from an interstellar gas cloud. they suspect this radiation is emitted by electrons spiraling in a magnetic field. what is the magnetic field strength inside the gas cloud?

Select all the correct answers. which three statements about electromagnetic radiation are true?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

Language is not the only way that humans communicate. describe how we use sound, touch, chemicals, and sight to communicate. need answer asap