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3 years ago

A 1.39 × 104

Physics

1 answer:

Natasha2012 [34]3 years ago

6 0

Answer:

v = 4.08 m/s

Explanation:

conservation of momentum

Let m = 1.39e4 kg

m(6.75) + m(1.41) = (m + m)v

m(6.75) + m(1.41) = 2mv

6.75 + 1.41 = 2v

8.16 = 2v

v = 4.08 m/s

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A flexible balloon contains 0.400 molmol of an unknown polyatomic gas. Initially the balloon containing the gas has a volume of

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Answer:

Mass released = 8.6 g

Given data:

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Final mass of nitrogen released = ?

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V₁/n₁ = V₂/n₂

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3 years ago

Four copper wires of equal length are connected in series. Their cross-sectional areas are 0.7 cm2 , 2.5 cm2 , 2.2 cm2 , and 3 c

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Answer:

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Explanation:

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$A_3=2.2 cm^2=2.2\times 10^{-4} m^2$

$A_4=3 cm^2=3\times 10^{-4} m^2$

Using $1cm^2=10^{-4} m^2$

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$R=\frac{\rho l}{\frac{1}{A_1}+\frac{1}{A_2}+\frac{1}{A_3}+\frac{1}{A_4}}$

Substitute the values

$R=\rho A(\frac{1}{0.7\times 10^{-4}}+\frac{1}{2.5\times 10^{-4}}+\frac{1}{2.2\times 10^{-4}}+\frac{1}{3\times 10^{-4}})$

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$I=\frac{V}{R}=\frac{145}{\rho l(2.62\times 10^4)}$

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Answer:

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Answer:

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