Calculate the work done to stretch an elastic string by 40cm if a force of 10n produces an extension of 4cm in it?

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.

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Photons with the highest energy have the longest period