What is the function of an arrow ( -7) and a plus sign ( ) in a chemical equation?

The plus sign is to show that something is added

the arrow is to show the products, which are the things you get at the end

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

What record? the question is incomplete