Joe loves joe so yes​

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.

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)