Most stars consist of what
percentage of hydrogen?
A. 65%
B. 73%
C. 81%
D. 88%

The consumption of fossil fuels could be

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.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?