Two electronic oscillators are making some sine waves, at frequencies f1 = 882 hz and f2 = 880 hz. at a certain point, the sound level from one alone would be sil 1 = 76 db, and from the other sil 2 = 82 db. how often do beats occur

As we know that when two sound sources of slightly different frequency sound together then we will have resultant sound intensity changes with time

this is known as Beats

in order to find the beat frequency we will use

here we know that

now here we know that from above formula

now from this equation we can say that we will hear 2 beats per second

so time interval between two beats is given as

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

d) physical means can be used to separate the components of air.