Sobre as ondas mecânicas e as ondas eletromagnéticas marque a alternativa correta: a) Transportam energia sem transportar matéria.
b) Transportam matéria e energia.
c) Transportam energia, porém, apenas as ondas mecânicas também transportam matéria.
d) Não têm nada em comum.

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

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?