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NSC Physical Sciences – South Africa

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Question 81

A car of mass 1000 kg accelerates from rest to 20 m/s in 5 seconds. What is the net force acting on the car?
MechanicsDynamics and Newton's lawsmedium

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Question 82

Which phenomenon explains the bending of light when it passes from air into water?
Waves and opticsLight and wave phenomenamedium

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Question 83

Which of the following materials is best described as a good electrical conductor?
Matter and materialsElectrical properties of materialseasy

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Question 84

Which of the following organic compounds is an example of a ketone?
Organic chemistryFunctional group identification and nomenclaturehard

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Question 85

Which component is used to increase the current in an electrical circuit?
Electricity and magnetismElectricity - Circuit Components and Functioneasy

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Question 86

What is the wavelength of a wave traveling at 300 m/s with a frequency of 50 Hz?
Waves and opticsWaves - Wave Properties and Calculationseasy

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Question 87

Which functional group is present in all alcohols?
Organic chemistryOrganic Chemistry - Functional Groupsmedium

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Question 88

If a metal wire's length is doubled and its diameter is halved, how does the resistance change?
Matter and materialsMatter - Electrical Resistance and Resistivitymedium

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Question 89

What is the magnetic field direction inside a solenoid?
Electricity and magnetismMagnetism - Magnetic Fields of Currentsmedium

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Question 90

Which law explains how the current through a conductor between two points is directly proportional to the voltage across the two points?
Electricity and magnetismElectricity - Ohm's Laweasy

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