The colors of objects we see by reflected light are due to
a. interference. b. selective absorption.
c. specular reflection. d. diffuse reflection.
b
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A 4-kg box is pushed across a level floor with a force of 60 N for a displacement of 20 m, then lifted to a height of 2 m. What is the total work done on the box?
(A) 200 J (B) 400 J (C) 1120 J (D) 1200 J (E) 1280 J
The equation of continuity applied to an incompressible ideal fluid flowing through a pipe of varying diameter is based on what of the following being conserved for the fluid in the pipe?
a. its kinetic energy b. its momentum c. its flow rate d. its potential energy
Which of the following nuclei is not "doubly magic"?
A. 16O B. 40Ca C. 48Ca D. 122Sn E. 208Pb
What happens to the cyclotron frequency of a charged particle if its speed doubles?
A) It quadruples. B) It triples. C) It doubles. D) It halves. E) It does not change.