MANOS ME AJUDEM COM ESSA QUESTÂO JA TO DUAS HORAS NELA Os motores elétricos comportam-se como receptores que utilizam a tensão para realizar trabalho. No entanto, como nos geradores, eles aquecem devido ao efeito joule. Imagine um motor que, quando em funcionamento, dissipa 8 W e tem uma força contraeletromotriz (fcem) de 12 V. Considerando estas informações e os estudos desenvolvidos sobre os receptores. Qual a resistência interna desse motor quando ligado a uma tensão de15 V

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Explain what will happen if decomposers were apsent from a forest ecoysystem.