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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Assuming the mass of the earth as $6.64 \times 10^{24} kg$ and the average mass of the atoms that make up the earth as $40 u$ (atomic mass unit), the number of atoms in the earth is approximately

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Answer:

Solution:

$1 a . m . u = 1 u = 1.6 \times 10^{- 27} kg$

$40 u = 40 \times 1.6 \times 10^{- 27} kg$

Number of atoms in earth,

$= \frac{6.64 \times 10^{24}}{40 \times 1.6 \times 10^{- 27}}$ = $10^{50}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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