Two speakers are wired to emit identical sounds in unison. The wavelength in air of the sounds is 6 m. Do the sounds interfere constructively or destructively at a point 10 m from both speakers? 1. Constructively 2. Neither 3. Destructively

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?