What practical function is provided by the ionosphere? produces auroras charges atoms heats oxygen and nitrogen permits worldwide radio communication

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?