Which of the following is not a physical change? a Condensation
b Photosynthesis
С
Galvanization (adding a protective zinc layer
to a metal)
d None of the above

Science

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

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.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease