Natural processes tend to increase the __________ of thermodynamic systems
a. temperature c. Carnot efficiency
b. internal energy d. entropy
D
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Faraday's Law: A flat coil is wrapped with 200 turns of very thin wire on a square frame with sides 18 cm long. A uniform magnetic field is applied perpendicular to the plane of the coil. If the field changes uniformly from 0.50 T to 0.00 T in 8.0 s, find the emf induced in the coil.
A. 2.1 mV B. 4.1 mV C. 0.21 V D. 0.41 V
The Orion Nebula glows strongly in the infrared
Indicate whether the statement is true or false
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers,
along the line joining the them, at a constant speed of 2.8 m/s. What beat frequency do you observe? The speed of sound in the room is 330 m/s. A) 13 Hz B) 431 Hz C) 26 Hz D) 4.7 Hz E) 118 Hz
An object, initially moving in the negative x direction, is subjected to a change in velocity in the negative y direction. If the resulting velocity vector is drawn from the origin, into which quadrant does this vector point?
a. 1st b. 2nd c. 3rd d. None, since the object is now moving in the negative y direction.