O ângulo de incidência, em um espelho plano, é de 20º, conforme a figura abaixo. Com base nas leis das reflexão, qual o valor do ângulo do raio refletido em relação à normal?

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.