It takes 20s for 3x10^6 electrons to flow through a wire ,what is the current?

b.transmitters send radio waves, and receivers capture radio waves.

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.