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3 years ago

27. The part of the Earth where life exists .

Physics

1 answer:

Neko [114]3 years ago

4 0

Answer:

Biosphere is the part of the earth where life exists.

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Which two of the following are the densest of the materials shown?

kari74 [83]

Explanation:

The density of the material is given by,

Density = $\frac{mass}{Volume}$

Case 1: Rock

Density = $\frac{mass}{Volume}$

Density = $\frac{1000}{0.5}$

Density = 2000 $\frac{g}{L}$

Case 2: Pillow

Density = $\frac{mass}{Volume}$

Density = $\frac{200}{10}$

Density = 20 $\frac{g}{L}$

Case 3: Bottle of Soda

Density = $\frac{mass}{Volume}$

Density = $\frac{2000}{2}$

Density = 1000 $\frac{g}{L}$

Case 4: Load of bread

Density = $\frac{mass}{Volume}$

Density = $\frac{100}{1}$

Density = 100 $\frac{g}{L}$

Thus, rock and bottle of soda has maximum density.

3 0

3 years ago

You are working at a company that manufactures electrical wire. Gold is the most ductile of all metals: it can be stretched into

devlian [24]

Answer: $R=1.424 M\Omega$

Explanation:

Given

mass of gold $m=1.6 gm$

Length of wire $L=2.2 km$

Resistivity of gold $\rho =2.44\times 10^{-8}$

density of gold $=19.3\times 10^3 kg/m^3$

and $mass=volume\times density$

$1.6\times 10^{-3}=volume\times 19.3\times 10^3$

$volume=8.29\times 10^{-8} m^3$

And $Resistance R=\frac{\rho L}{A}$

also be written as

$R=\frac{\rho L^2}{V}$

where $L=length$

$V=volume$

$\rho =resistivity\ of\ gold$

$R=\frac{2.44\times 10^{-8}\times (2200)^2}{8.29 \times 10^{-8}}$

$R=1.42\times 10^{6} \Omega$

$R=1.424 M\Omega$

5 0

3 years ago

What distance will an object cover in 20 seconds if it is moving at 8 m/s

Nitella [24]

Answer:

160 m

Explanation:

distance covered in 1 s = 8 m

therefore, distance covered in 20 s = 8 * 20 m = 160 m

4 0

3 years ago

Which sphere does the frog belong to?

LiRa [457]

Answer:

what

Explanation:

3 0

4 years ago

Sometimes a new experimental result may seem to go against a well-established scientific theory. Which statement BEST describes

MrMuchimi

The best thing to do in this case is to redo the experiment and re record the info, it has to be precise and accurate so you also have to check if your procedure is correct. If the results are both accurate and precise then you have to report your findings to the committee of that specific field. <span />

7 0

3 years ago

Read 2 more answers