Stellar parallax occurs in much the same way as parallax on earth, with greater parallax for stars that are nearer. return to the main "parallax" screen, and from here select the "stellar parallax" button, and watch how the motion of the star changes in the "view from earth" window. which statement best summarizes why stellar parallax occurs?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?