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4 years ago

Help awnsers need expertsss

Physics

1 answer:

aleksley [76]4 years ago

8 0

Answer:

ok the answer for number 14 is 0.5 0 kilograms to get this answer this is my explanation ok where try that the bottle of water when full has a mass of 1.30 kg and one half of the water is poured away the mass of the bottle and the half of water is 0.90 kilograms so to get the the water that was poured out we will subtract 0.90 kg from 1.30 kilograms to get 0.40 kilograms so this 0.40 kilograms is the half of the water that was poured out meaning the other half is also 0.40 so to get the mass of the bottle we will take mass of the bottle plus the water - mass of the water so it will be 1.30 kilograms - 0.80 kilograms to get 0.50 kilograms.
and number 15 I don't know I'm sorry about that

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Nataly [62]

Answer:

The diameter of the hose is 0.326 mm.

Explanation:

Given that,

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We need to calculate the radius

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Where, A = area of cross sectional

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We know that,

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Put the value into the formula

$\dfrac{0.00378541}{28\times1609.34}=\pi r^2$

$r=\sqrt{\dfrac{0.00378541}{28\times1609.34\times\pi}}$

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$d=2\times1.63\times10^{-4}$

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3 years ago

If two firecrackers produce a sound level of 81 dBdB when fired simultaneously at a certain place, what will be the sound level

Mrac [35]

Answer:

77.96dB

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I is the intensity in MKS units; I0 is the threshold intensity for human hearing (10^-12 W/m^2)

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gregori [183]

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