Se deja caer un cuerpo desde una altura de 50 metros cual es el tiempo que demora en caer

How long could you survive without electricity? what parts of your life would be affected by loss of electricity? should you prepare for an electricity outage, and if so, how would you prepare? what backup system could your family or community install to generate limited amounts of electricity during an outage? how does this system create an electric force field and generate electric current?

There was a water with a boat and a rock in a boat. will the level of the water stay the same or higher or lower if u remove the rock from the boat and put it under water? ?

There are 3 different possible isomers of a dibromoethene molecule. what are these isomers?