Why might someone describe sunglasses as translucent, even though objects on the other side are clearly visible?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points