What is the acceleration of a 31 kg object pushed with a force of 42N You have a mass of 75.25 kg on Earth, what is your mass on Mars where the acceleration due to gravity is 3.72 m/s2?

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?