The color of an object depends on the colors of
A) the light that illuminates them.
B) molecules that comprise them.
C) the foreground.
Answer: A
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A mass on a spring vibrates in simple harmonic motion at a frequency of 4.26 Hz and an amplitude of 3.00 cm. If a timer is started when its displacement is a maximum (hence x = 3.00 cm when t = 0), what is the acceleration magnitude when t = 3.74 s?
a. zero b. 0.732 m/s2 c. 39.2 m/s2 d. 19.6 m/s2 e. 10.5 m/s2
If two vectors are perpendicular to each other, their cross product must be zero
A) True B) False
Thin Films: Light in a frozen block of ice reflects off the ice-air interface at the surface of the block. What phase shift does it undergo?
A. 0° B. 90° C. 180° D. 270° E. It does not undergo any phase shift.
Which of these is a transverse wave?
A) a Slinky shaken to and fro. B) a radio wave C) a sound wave D) all of the above E) none of the above