Describa un ejemplo del mundo real en el que la cantidad de energía potencial y cinética cambia, pero la cantidad total de energía mecánica permanece igual.

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

20 the main source of energy for our planet comes from the