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3 years ago

PLEASE WILL HELP WILL BRAINLIEST!!!!!!!!!!!!!!!!!

1 answer:

7 0

The acceleration will be the same all the way down. If this resident is still being allowed to live on Earth, then the acceleration will be 9.8 m/s² downward.

It doesn't matter how much trash is in the bag, how heavy it is, how big it is, how small it is, how much mass it has, or what color it is, and it doesn't matter whether the inconsiderate resident throws it up, down, or straight out horizontal. The acceleration is 9.8 m/s² all the way down, until it hits the ground, splits wide open, and strews trash all over the neighborhood. Because 9.8 m/s² is the acceleration of gravity everywhere on Earth.

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How do you find the volume of a rectangular brick?

timurjin [86]

Answer:

Multiply the length, width and height of the brick to calculate its volume.

Explanation:

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3 years ago

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The sound level at a distance of 1.48 m from a source is 120 dB. At what distance will the sound level be 70.7 dB?

Tju [1.3M]

Answer:

The second distance of the sound from the source is 431.78 m..

Explanation:

Given;

first distance of the sound from the source, r₁ = 1.48 m

first sound intensity level, I₁ = 120 dB

second sound intensity level, I₂ = 70.7 dB

second distance of the sound from the source, r₂ = ?

The intensity of sound in W/m² is given as;

$dB = 10 Log[\frac{I}{I_o} ]\\\\For \ 120 dB\\\\120 = 10Log[\frac{I}{1*10^{-12}}]\\\\12 = Log[\frac{I}{1*10^{-12}}]\\\\10^{12} = \frac{I}{1*10^{-12}}\\\\I = 10^{12} \ \times \ 10^{-12}\\\\I = 1 \ W/m^2$

$For \ 70.7 dB\\\\70.7 = 10Log[\frac{I}{1*10^{-12}}]\\\\7.07 = Log[\frac{I}{1*10^{-12}}]\\\\10^{7.07} = \frac{I}{1*10^{-12}}\\\\I = 10^{7.07} \ \times \ 10^{-12}\\\\I = 1 \times \ 10^{-4.93} \ W/m^2$

The second distance, r₂, can be determined from sound intensity formula given as;

$I = \frac{P}{A}\\\\I = \frac{P}{\pi r^2}\\\\Ir^2 = \frac{P}{\pi }\\\\I_1r_1^2 = I_2r_2^2\\\\r_2^2 = \frac{I_1r_1^2}{I_2} \\\\r_2 = \sqrt{\frac{I_1r_1^2}{I_2}} \\\\r_2 = \sqrt{\frac{(1)(1.48^2)}{(1 \times \ 10^{-4.93})}}\\\\r_2 = 431.78 \ m$

Therefore, the second distance of the sound from the source is 431.78 m.

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3 years ago

PLEASE HELP!!!!! Will give brainliest to best answer

PolarNik [594]

Answer:

the answer is d

Explanation:

I took the test

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4 years ago

The different molecules that make up the air in a room have, on average the same kinetic energy. How does the speed of the diffe

prisoha [69]

Answer:

speed of molecule ∝ 1/mass of molecule.

Explanation:

The velocities of the molecules depend on their masses. That's because if the molecules are large in size, their velocity is slower. Therefore their velocity is quicker when their size is small, since the molecules can move faster.

Therefore , it can be written as

speed of molecule ∝ 1/mass of molecule.

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4 years ago

Explanation of principles of flotation

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When any boat displaces a weight of water equal to its own weight, it floats. This is called the "principle of flotation": A floating object displaces a weight of fluid equal to its own weight.

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