Una central termoeléctrica produce 45 BTU de potencia. Si el carbón libera 90 BTU de energía, calcular la tasa con la que se elimina el calor de la central eléctrica, en Joules.

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.