If the sine of an angle is 4/7 what is the cosine of its complement.

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Place me with this question is my last question

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion