One particle has a charge of -1.87 * 10-9 C, while another particle has a charge of -1.10 x 10-'c. If the two particles are separated by 0.05, what is
the electromagnetic force between them? The equation for Coulomb's law is
F. kq1 q2, and the constant, k, equals 9.00 x 10-9 Nm²/C2,
A. -3.70 x 10-7N
B. -7.41 x 10-6N
C. 3.70 x 10-7N
O D. 7.41 x 10-6N

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.