An RL series circuit has the following components: 6.0-mH coil, 0.50-W resistor, 12-V battery, ammeter, and switch. What is the time constant of this circuit?
a. 2.5 × 10^-2 s
c. 200 s
b. 12 × 10^-3 s
d. 5.0 × 10^-3 s
B
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As a result of friction between internal parts of an isolated system
a. the total mechanical energy of the system increases. b. the total mechanical energy of the system decreases. c. the total mechanical energy of the system remains the same. d. the potential energy of the system increases but the kinetic energy remains the same. e. the kinetic energy of the system increases but the potential energy of the system remains the same.
While a material is changing state:
a. its temperature is constantly changing. b. its temperature stays constant. c. its atomic and molecular motions become less limited. d. its internal (thermal) energy stays constant. e. the amount of heat needed is given by its specific heat.
What does the phenomenon of interference demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of the atomic orbitals D) the particle nature of the photon E) the process of ionization
The force of static friction exerted on an automobile's tires by the ground
a. provides the accelerating force that makes the car move forward. b. does positive work on the car while it is accelerating. c. does negative work on the car while it is decelerating. d. does everything listed in (a), (b) and (c). e. only does positive or negative work as in (b) or (c).