The electric potential at the origin of an xy-coordinate system is 40 V. A -8.0-C charge is brought from x = + to that point. What is the electric potential energy of this charge at the origin?
A) -3.2 10-4 J
B) 3.2 10-4 J
C) -40 J
D) 40 J
E) 8.0 J
Question 2
One of the harmonics of a column of air open at both ends has a frequency of 448 Hz and the next higher harmonic has a frequency of 576 Hz. What is the fundamental frequency of the air column?
A) 32 Hz
B) 64 Hz
C) 88 Hz
D) 128 Hz
E) 256 Hz