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3 years ago

Density of iron in CGS unit is 7.8 g/cm3. Its density is SI is

Physics

1 answer:

kumpel [21]3 years ago

4 0

Answer:

7800kg/m³

Explanation:

Density of iron in CGS unit is 7.8 g/cm3. Its density is SI is

Given the density of iron = 7.8 g/cm3.

The SI units must be in kg/m³

7.8g = 7.8/1000 kg

7.8g = 0.0078kg

1cm³ = 0.000001m³

7.8g/cm³

= 0.0078/0.000001 kg/m³

= 7800kg/m³

Hence the density in SI unit is 7800kg/m³

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A circular bird feeder 19.0 cm in radius has rotational inertia 0.130 kg·m2. It's suspended by a thin wire and is spinning slowl

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Answer:

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Explanation:

Given that

R= 19 cm

I=0.13 kg.m²

N₁ = 24.2 rpm

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Final linear momentum L₂

L₂= I₂ ω₂

I₂ = I + m r²

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L₁ = L₂

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Iω₁ - m v r = ( I + m r²) ω₂

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3 years ago