What is the mass of a 50 kg person on earth? a) 50 kg
b) 490 kg
c) 5.1 kg
d) 0.19 kg

Arock collection comes from which part of earth?

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