If a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear a. reflected waves with a higher intensity than the original sound source. b. reflected waves of the exact same intensity as the original sound source. c. reflected waves of a different wavelength from the original sound source. d. two similar sets of sounds if she is also near the source of the sound.

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?