How can you make a sound louder? adding more frequency

removing energy

removing frequency

adding more energy

add more energy..

hope it helps :)

BY adding more energy

Explanation:

Because by adding energy  it will cause the string/sound to vibrate more which can cause more air particles to more and longer making the sound louder.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .