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NSC Physical Sciences – South Africa

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Question 171

Which phenomenon explains the bending of waves around obstacles?
Waves and opticsWaves - Wave Propertiesmedium

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Question 172

What is the general formula of alkanes in organic chemistry?
Organic chemistryOrganic Chemistry - Hydrocarbon Familiesmedium

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Question 173

What is the acceleration of a 10 kg object if a net force of 50 N is applied to it?
MechanicsMechanics: Newton's Laws of Motioneasy

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Question 174

Which device converts electrical energy into mechanical energy?
Electricity and magnetismElectromagnetism: Electric motors and generatorseasy

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Question 175

A 2 Ω resistor and a 3 Ω resistor are connected in series. What is the total resistance?
Electricity and magnetismElectric circuits: Resistors in series and parallelmedium

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Question 176

What phenomenon explains the bending of light when it passes from air into water?
Waves and opticsLight: Refraction and reflectioneasy

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Question 177

What is the main intermolecular force present in water (H₂O)?
Matter and materialsIntermolecular forcesmedium

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Question 178

Which component in a simple electric circuit limits the current?
Electricity and magnetismElectric circuits and componentseasy

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Question 179

What is the frequency of a wave if its wavelength is 0.5 m and its speed is 340 m/s?
Waves and opticsWave properties and calculationsmedium

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Question 180

During a chemical reaction, which of the following indicates the formation of a new substance?
Chemical changeIndicators of chemical changemedium

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