What is a nebula? the core of a massive star a cloud of gas and dust in space a swirling disk with a lot of gravity the debris remaining after a supernova

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

If a star is moving toward earth, it is

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force