two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. they emit sound with a frequency of 514 hz. a person is standing away from the wall, in front of one of the loudspeakers. what is the closest nonzero distance from the wall the person can stand and hear constructive interference? the speed of sound in air is 343 m/s.

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?

Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?

Multiply 5.036×102m by 0.078×10−1, taking into account significant figures.