Can someone help me please!! also this is not a test this is just an assignment so please do not report as being a test

An observer that stands still as the electron moves by him, will observe

Positrons are spontaneously emitted from the nuclei of

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.