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NSC Physical Sciences – South Africa

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Question 231

Which law explains why the current through a conductor between two points is directly proportional to the voltage across the two points?
Electricity and magnetismElectric circuitseasy

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Question 232

Which of the following states of matter has a definite shape and volume?
Matter and materialsMatter and Materials - States of Mattereasy

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Question 233

During a chemical reaction, what does the term 'exothermic' mean?
Chemical changeChemical Change - Energy Changes in Reactionsmedium

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Question 234

A 2 kg object moving at 3 m/s collides with a stationary 3 kg object and they stick together. What is their combined velocity immediately after the collision?
MechanicsMechanics - Momentum and Collisionsmedium

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Question 235

In an electrical circuit, what is the role of a resistor?
Electricity and magnetismElectricity and Magnetism - Circuit Componentsmedium

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Question 236

Which phenomenon explains the bending of light when it passes from one medium to another?
Waves and opticsWaves and Optics - Refractionhard

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Question 237

Which of the following statements about isotopes is true?
Matter and materialsMatter and Materials - Atomic Structurehard

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Question 238

A car of mass 1200 kg accelerates from rest to 20 m/s in 10 seconds. What is the average acceleration of the car?
MechanicsMechanics - Kinematicseasy

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Question 239

A wave has a frequency of 50 Hz and a wavelength of 6 m. What is its speed?
Waves and opticsWaves - Wave propertieseasy

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Question 240

In a chemical reaction, if the reactants are all used up and no product is formed, what has happened?
Chemical changeChemical change - Reaction typesmedium

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