What is the energy of a photon that emits a light of frequency 4.47 x 10^14 Hz? A. 6.71 x 10^-19 J
B. 6.75 x 10^-19 J
c. 1.34 x 10^-19 J
D. 2.96 x 10^-19 J

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

Why is retrograde motion an apparent motion