Why is there no effect on other branches in a paral- lel circuit when one branch of the circuit is opened or closed?

If a star is moving toward earth, it is

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday

What is a transverse wave? how do the particles in the medium move in relation to the energy of the wave? does this wave require a medium?