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storchak [24]
3 years ago
10

3. solve the following with regard to significant figures a) 5.8 + 0.125 II) 3.9x105-2.5x104

Physics
1 answer:
KonstantinChe [14]3 years ago
3 0

Answer:

a)5.925

ii)149.5 or383.5

Explanation:

ii)3.9×105-2.5×104

409.5-260

the zero in 260 may or may not be significant since it is after two significant figures thus we have two options

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Explanation:

Given parameters:

Distance hopped  = 84m

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Time  = 7s

Unknown:

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Velocity of kangaroo  = ?

Solution:

To solve this problem,

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Answer:

The skater has mechanical/gravitational potential energy at the two meter mark. The skater gets to two meters high on the other end of the ramp. In terms of the conservation of energy, the skater will never go higher than two meter on the other end of the the ramp because energy can be neither created nor destroyed.

Explanation:

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3 years ago
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Answer:

Explanation:

(a)

Since the earth is assumed to be a sphere.

Volume of atmosphere = volume of (earth +atm osphere) — volume of earth

= \frac{4}{3}\pi(6400+ 50)^3 -  \frac{4}{3}\pi (6400)
^3\\\\=  \frac{4}{3}\pi(6192125000) km’^3\\= 2.6\times 10^{19} m^3

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Hence the required molecules is 13.3\times10^{43} molecules


(c)

Write the ideal gas equation as follows:

PV =nRT
\\\\n=\frac{1.0 atm \times 0.5L
}{0.08206 L\, atm/mol\,K \times (37 +273.1 5)K} = 0.0196 moles

no.\, of\, molecules = 0.0196 moles \times\frac{6.022\times10^{23} molecules}
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(d)

Volume fraction in Caesar last breath is as follows:  

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(e)

Since the volume capacity of the human body is 500 mL.

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3 years ago
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Answer:

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Explanation:

3 0
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