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photoshop1234 [79]
3 years ago
14

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

Physics
1 answer:
seraphim [82]3 years ago
6 0

Answer:

There are no forces acting on the rock :)

Explanation:

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A package of aluminum foil contains 50. ft2 of foil, which weighs approximately 7.5 oz . Aluminum has a density of 2.70 g/cm3. W
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Answer:

The thickness of the foil is 0.017 mm.

Explanation:

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Density = 2.70 g/cm³

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Using formula of density

\rho=\dfrac{m}{V}

\rho=\dfrac{m}{A\times t}

t=\dfrac{m}{A\times \rho}

Where, A = area

t = thickness

m = mass

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t=\dfrac{212.6175}{46451.52\times2.70}

t=0.00170\ cm

t=0.017\ mm

Hence, The thickness of the foil is 0.017 mm.

3 0
4 years ago
We are sending a 30 Mbit file from source host A to destination host B. All links in the path between source and destination hav
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Answer:

t=1.5\times 10^{-4}\ s

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<u>Now the delay in data transfer from source to destination for each 10 Mb:</u>

t'=\frac{s}{v}

t'=\frac{10^4}{2\times 10^8}

t'=5\times 10^{-5}\ s

<u>Now this time is taken for each 10 Mb of data transfer and we have 30 Mb to transfer:</u>

So,

t=3\times t'

t=3\times 5\times 10^{-5}

t=1.5\times 10^{-4}\ s

3 0
4 years ago
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