An outside loudspeaker (considered a small source) emits sound waves with a power output of 104 w. (a) find the intensity 10.8 m from the source. w/m2 (b) find the intensity level in decibels at that distance. db (c) at what distance would you experience the sound at the threshold of pain, 120 db? m

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

The speed of light can be used to measure the

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c