A sound wave with intensity 1.6×10−3 W/m2 is perceived to be modestly loud. Your eardrum is 6.0 mm in diameter. How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?

Energy  transferred to eardrum while listening to this sound for 1.0 min is

Explanation:

Given

Sound waves of intensity

Size of the ear drum i.e diameter   millimeter

Radius of the ear drum

Time for which the eardrum will listen to this sound minutes.

As we know that the energy transferred to eardrum can be calculated by using below given relation

Where is the energy in Joules

I is the intensity in

A is the area in

and t is the time in seconds

Substituting the given values in above equation we get

Energy  transferred to eardrum while listening to this sound for 1.0 min is

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

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