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NSC Physical Sciences – South Africa

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Question 161

What is the balanced chemical equation for the combustion of methane (CH₄)?
Chemical changeChemical change - Combustion reactionsmedium

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Question 162

In a series circuit with three identical resistors of 4 Ω each, what is the total resistance?
Electricity and magnetismElectricity - Series and parallel circuitsmedium

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Question 163

What is the molecular formula of ethanoic acid?
Organic chemistryOrganic chemistry - Carboxylic acidshard

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Question 164

What is the acceleration of an object of mass 5 kg when a net force of 20 N is applied to it?
MechanicsMechanics - Newton's Lawseasy

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Question 165

Which of the following is the correct unit for electric current?
Electricity and magnetismElectricity - Units and Measurementseasy

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Question 166

Which wave property remains unchanged when light passes from air to glass?
Waves and opticsWaves - Light Refractionmedium

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Question 167

Which type of intermolecular force is primarily responsible for the high boiling point of water?
Matter and materialsMatter - Intermolecular Forcesmedium

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Question 168

Which of the following represents a balanced chemical equation for the combustion of methane?
Chemical changeChemical Change - Combustion Reactionsmedium

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Question 169

A metal wire of length 2 m and cross-sectional area 1 mm² has a resistance of 10 Ω. What will be the resistance if the wire is stretched to 4 m without changing its volume?
Matter and materialsMatter - Electrical Resistancehard

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Question 170

What is the magnetic effect of electric current?
Electricity and magnetismElectricity - Magnetic Effects of Currenteasy

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