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?

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?