Which of the following elements do living things have that volcanic rocks do not have? oxygen
silicon
magnesium
carbon

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Which statement best describes how private industry decides where to spend the money on research and development

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.