Una central hidroeléctrica tiene 2,5 Hm3 de agua embalsada a una altura media de 120 m con relación a la turbina. a) ¿Cuál es la energía potencial en kWh? b) Si el rendimiento de las instalaciones es del 65% ¿Qué energía producirá en una hora si el agua cae con un caudal de 2 m3 /s)

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final