Does anyone have photo of home-made pendulum? (string and any weight) I need to send photo today but I'm not in home

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

In physics the desire of an object to keep doing what it is doing is termed?

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