A 0.640-m long gas column is open at both ends. What is the fundamental resonant frequency of the air column if the speed of sound in the air is 340 m/s?
A)
432 Hz
B)
266 Hz
C)
198 Hz
D)
132 Hz
E)
669 Hz
B
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Why do the constellations that are visible in the sky at night change with the seasons?
A. because the celestial sphere revolves around Earth B. because Earth revolves around the Sun C. because Earth rotates about an axis D. because Earth is a sphere
The process of bonding small solid particles together at high temperature without melting them is called ______________.
Fill in the blank(s) with the appropriate word(s).
A particle with a positive charge sits at rest near the south pole of a magnet as shown below. What is the direction of the magnetic force on the particle? Choose from the answers provided to the right and below the diagram.
A.A
B.B
C.C
D.D
E. Toward the viewer
F. Away from the viewer
T. There is no magnetic force on the particle.
A -7.0-?C point charge has a positively charged object in an elliptical orbit around it
If the mass of the positively charged object is 1.0 kg and the distance varies from 5.0 mm to 20.0 mm between the charges, what is the maximum electric potential difference through which the positive object moves? (k = 1/4??0 = 8.99 × 109 N • m2/C2) A) 9.4 MV B) 3.2 MV C) 4.2 MV D) 16 MV