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NSC Physical Sciences – South Africa

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Question 181

What type of bond is present in methane (CH₄)?
Organic chemistryChemical bonding in organic moleculesmedium

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Question 182

A metal rod is heated and expands. Which property of matter does this demonstrate?
Matter and materialsProperties of materialseasy

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Question 183

What is the magnitude of the magnetic force on a 2 C charge moving at 3 m/s perpendicular to a magnetic field of 4 T?
Electricity and magnetismMagnetic forces on chargeshard

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Question 184

Which wave phenomenon explains why a spoon appears bent when partially submerged in water?
Waves and opticsWave behavior and opticsmedium

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Question 185

In mechanics, which quantity is a vector?
MechanicsMechanics - Kinematics and vectorseasy

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Question 186

What happens to the resistance of a metallic conductor as temperature increases?
Electricity and magnetismElectricity - Resistance and resistivityeasy

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Question 187

Which wave property changes when light passes from air into water, causing refraction?
Waves and opticsWaves - Refraction and wave propertieseasy

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Question 188

Which particle determines the chemical properties of an atom?
Matter and materialsAtomic structure and chemical propertieseasy

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Question 189

During an exothermic chemical reaction, what happens to the system's enthalpy?
Chemical changeChemical reactions - Energy changesmedium

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Question 190

Which functional group characterizes an alcohol?
Organic chemistryOrganic compounds and functional groupsmedium

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