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Physics · UNITS AND MEASUREMENT
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Physics · UNITS AND MEASUREMENT
What are reliable digits plus the first uncertain digit in a reported measurement known as?
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Which of the following is defined as the comparison of any physical quantity with a certain basic, arbitrarily chosen, internationally accepted reference standard?
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Which of the following statements about the International System of Units (SI) is correct?
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If Energy (\( E \)), Velocity (\( v \)), and Force (\( F \)) are chosen as the fundamental physical quantities instead of Mass (\( M \)), Length (\( L \)), and Time (\( T \)), the dimensional formula of Mass (\( M \)) in this new system will be:
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What is the dimensional formula of mass density \( \rho \)?
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What is the rounded value of \( 2.735 \) when rounded off to three significant figures?
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The dimensional formula of thermal conductivity \( k \) in the heat flow equation \( Q = \frac{k A (T_1 - T_2) t}{d} \) is:
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Calculate the approximate average mass density (in \( \text{kg m}^{-3} \)) of the Sun using mass \( M = 2.0 \times 10^{30}\text{ kg} \) and radius \( R = 7.0 \times 10^8\text{ m} \).
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According to the SI base units and definitions provided, the SI unit of thermodynamic temperature (kelvin) is defined by taking the fixed numerical value of which fundamental physical constant?
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