Receiver
questions:
1) going back to the idea of a plane before take off. why was the sound of the engine louder when it goes from low to high power
goes from low to high power?
use the terms volume, energy, and amplitude to explain your answer
2) graph what the sound wave would look like for a 2 year old girl laughing and a 40 year old man
laughing

What is the best description for the volume of air volume of air provided in a high quality rescue breath?

Explanation:

A) only Enough air to create a visible rise of the chest.

B) Until you can no longer force air in.

C) plenty of air make sure it is adequate to sustain life

D) clear and obvious rise of the chest, sustained over a few seconds

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 .