Cómo era la naturaleza al inicio de la tecnología y la población en pequeñas ciudades y pueblos?

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?