Describe liquids and GASSES IN TERMS OF THERE VOLUME AND SHAPES

Physics

2 answers:

Leni [432]3 years ago

7 0

Explanation:

Liquids- Have definite volume

No definite shape(takes the shape of the container)

Gases- No definite volume

No definite shape(takes the shape of the container)

antiseptic1488 [7]3 years ago

3 0

Answer:

Explanation:

liquids have definite volume

liquids do not have definite shape. The take the shape of the container in which they are kept.

gases do not have definite volume.

gases do not have definite shape. They take the shape of the container in which they are kept.

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A rock group is playing in a bar. Sound

Sloan [31]

Answer:

5292.64 m

Explanation:

$dB \rightarrow \textrm{sound level}\\ I \rightarrow \textrm{sound intensity}\\ I_0 \rightarrow \textrm{threshold sound intensity}\\ x \rightarrow \textrm{distance of corresponding to threshold intensity of hearing}$

Taking threshold intensity as $1\times 10^{-12} W/m^{2}$ and since it's a constant then sound intensity for 66.7 dB will be

$66.7\;\rm dB = 10\; log_{10}\;\left(\dfrac{I}{I_0} \right)\\ \dfrac{I}{10^{-12}} = 10^{6.67}\\ I = 4.67735\times 10^{-6}\;\rm W/m^2\\ \boxed{I \approx 4.7\times 10^{-6}\;\rm W/m^2}$

Also, since sound intensity is inversely proportional to the square of the distance of the source then the distance can be given by

$\dfrac{I_1}{I_2} = \dfrac{r^2_2}{r^2_1}\\ \dfrac{4.7\times 10^{-6}\;\rm W/m^2}{10^{-12}\;\rm W/m^2} = \dfrac{x^2\;\rm m}{(5.96\;\rm m)^2}\\ x =\sqrt{28012000}\\ \boxed{x \approx 5292.64;\rm m}$