The colors seen on the shiny side of a CD or DVD are due to
A. Simple reflections of light
B. Colors embedded in the shiny coating
C. Diffraction due to the holes in the coating
D. Reflections from both surfaces of the disk.
Answer: C. Diffraction due to the holes in the coating
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Indicate whether the statement is true or false
A rectangular loop of wire measures 1.0 m by 1.0 cm. If a 7.0-A current flows through the wire, what is the magnitude of the magnetic force on the centermost 1.0-cm segment of the 1.0-m side of the loop? (?0 = 4? × 10-7 T ? m/A)
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If during a given physical process the only force acting on an object is friction, which of the following must be assumed in regard to the object's kinetic energy?
a. decreases c. remains constant b. increases d. cannot tell from the information given
A 100 kg football linebacker moving at 2 m/s tackles head-on an 80 kg halfback running 3 m/s. Neglecting the effects due to digging in of cleats
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