Aband director instructs students to play a pitch louder. how will the sound wave change when the band plays the same pitch louder?

the speed of the sound wave will increase.
the frequency of the sound wave will increase.
the wavelength of the sound wave will increase.
the amplitude of the sound wave will increase.

Explanation :

Loudness is defined as how our ear perceives the sound. It is basically related to the intensity of a sound wave.

When the same pitch is played louder, its amplitude changes. Amplitude is the maximum displacement covered by a wave.

This is the only difference between the loudness to that of shrillness. The amplitude of the loud sound is more as compared to that of shrill sound.

So, the correct option is (d).

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

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