Atividade – Cálculo de Velocidade de propagação da onda. 1- Uma fonte de ondas sonoras está imersa em água, emitindo ondas a uma frequência de 340 Hz. Sabendo que o comprimento de onda das ondas produzidas pela fonte é de 80 cm, determine a velocidade de propagação das ondas sonoras na água.

de uma onda que se propaga com velocidade igual a 300m/s, medindo 1,5 cm.

3- Faça uma pesquisa e preencha a tabela sobre os mitos e verdades (Física das radiações), observe o exemplo abaixo:

Questões Mito ou Verdade?

1As micro-ondas podem contaminar os alimentos tornando-os radioativos?MITO. As micro-ondas apenas aquecem as moléculas de água, fazendo-as vibrar, transmitindo esse calor para os alimentos.

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