You can raise the temperature of an object with
a. microwaves.
b. infrared waves.
c. ultraviolet rays.
d. all of the above.
e. only (a) and (b) above.
d
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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.
A spring with a force constant of 1.50 N/m is attached to a mass of 120 g. The system has a damping constant of 0.0180 Ns/m. How long does it take the amplitude of the oscillations to decrease from 10.0 mm to 5.00 mm?
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A spinning ice skater is able to control the rate at which she rotates by pulling in her arms. We can best understand this effect by observing that in this process:
A) her angular momentum remains constant. B) her moment of inertia remains constant. C) her kinetic energy remains constant. D) her total velocity remains constant. E) she is subject to a constant non-zero torque.
What is the purpose of having automobile air bags?