Light not only has wavelike properties, but also has particle-like properties. What are these "particles" of light called?
a. quarks b. wavicles
c. photons d. etherons
c
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The density of a submarine cruising beneath the ocean surface has the same density as
A) a crab. B) iron. C) a floating submarine. D) ocean water. E) none of the above
Why did Saturn's rings appear very different in 1995 and 2003?
What will be an ideal response?
Equilibrium: A store's sign has a mass of 20 kg and is 3.0 m long. It is uniform, so its center of gravity is at the center of the sign. It is supported horizontally by a small loose bolt attached to the wall at one end and by a wire at the other end, as shown in the figure. What is the tension in the wire?
A. 460 N B. 230 N C. 120 N D. 200 N E. 300 N
One of the defining features of "pseudoscience" is that pseudoscientific ideas
A) appear to be scientific. B) are unusual, or odd. C) Both of the above. D) are wrong. E) are held tentatively, as a hypothesis.