Neco Model Questions Vol1 2021 Geography Question 25
Practice objective / multiple choice question 25 from the 2021 Neco Model Questions Vol1 Geography examination.
A rock sample consists of \(55\%\) quartz (density \(2.65\ \text{g cm}^{-3}\)), \(30\%\) feldspar (density \(2.56\ \text{g cm}^{-3}\)) and \(15\%\) mica (density \(2.80\ \text{g cm}^{-3}\)).\n\n(a) Calculate the average density of the rock using the weighted‑average method.\n(b) If a \(2000\) kg block of this rock weathers at a rate of \(0.02\%\) of its mass per year, estimate the total mass loss after \(10\) years.
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This is Neco Model Questions Vol1 2021 Geography Question 25. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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