In which of the following application of technology in the home is radioactivity utilized?
A) a door-bell
B) a humidifier
C) a smoke detector
D) a food sterilizer
C
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A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of initial magnitude 0.40 T. The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s
If the resistance of the coil is 16 ?, at what rate is power generated in the coil? A) 5.0 W B) 10 W C) 15 W D) 20 W E) 25 W
According to your textbook, popular confusion is lessened when applying Heisenberg's uncertainty principle by heeding the distinction between
A) momentum and energy. B) energy and time. C) passive observation and probing.
A 100-W lamp glows brighter than a 25-W lamp. The electric resistance of the 100-W lamp is
A) less. B) greater. C) the same.
The acceleration of an object as a function of time is given by a(t) = (3.00 m/s3)t. If the object is at rest at time t = 0.00 s, what is the velocity of the object at time t = 5.00 s?
A) 15.0 m/s B) 37.5 m/s C) 0.00 m/s D) 12.0 m/s E) 75.0 m/s