The law of reflection, as well as the law of refraction, can be derived using Huygens' principle
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TRUE
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Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0 m/s2 to the right, what is the magnitude F of the applied force?
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A. 25 N B. 18 N C. 11 N D. 14 N E. 7.0 N
An ideal gas undergoes an adiabatic process while doing 25 J of work. What is the change in internal energy?
A) zero B) 50 J C) 25 J D) -25 J E) none of the above
Study this H-R diagram. Which of the following stars is the most massive? (The red arrows help you locate these stars on the diagram.)
A) Beta Centauri B) Vega C) Bellatrix D) DX Cancri
If a negative charge is placed inside a hollow isolated conductor that is originally neutral and the charge does not touch that conductor at any time:
a. both the inner and outer surfaces will become negative. b. both the inner and outer surfaces will remain neutral. c. the outside surface of the conductor will become positively charged. d. the inside surface of the conductor will become positively charged.