1 Los interruptores del circuito de fallo a tierra deben utilizarse para todas las siguientes, ¿excepto?
10
a)
b)
c)
Techo
Cualquier área exterior
En donde el cable eléctrico temporal esté siendo utilizado

To a of 4 x hz is 1. 0. mm nm nm

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.

What explosion in the upper solar atmosphere releases about as much energy as millions of 100-megaton hydrogen bombs exploding simultaneously?