What is the electric field at a point 0.300m to the right of a -4.77x10^-9 C charge?

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

In the absence of friction gravity and all other external forces

An engine is designed to obtain energy from the temperature gradient of the ocean. what is the thermodynamic efficiency of such an engine if the temperature of the surface of the water is 59°f (15°c) and the temperature well below the surface is 41°f (5°c)