Pluto is no longer classified as a planet
Indicate whether the statement is true or false
TRUE
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Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Which statement is true about the unit vectors 
, 
and 
?
A.
B.
C.
D.
is directed east and is directed south, points up out of the surface.E.
What conditions must be met for complete destructive interference between two waves?
High frequency alternating current is passed through a solenoid that contains a solid copper core insulated from the coils of the solenoid. Which statement is correct?
A. A copper core remains cool no matter what the frequency of the current in the solenoid is. B. The copper core remains cool because the induced emf is parallel to the solenoid axis and fluctuates rapidly. C. The copper core heats up because an emf parallel to the solenoid axis is induced in the core. D. The copper core heats up because circular currents around its axis are induced in the core. E. The copper core heats up because the electric field induced in the copper is parallel to the magnetic field produced by the solenoid.
Which of the following frequencies could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends? The fundamental frequency is 85 Hz
a. 85 Hz. b. 170 Hz. c. 255 Hz. d. 340 Hz. e. 382 Hz.