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NSC Physical Sciences – South Africa

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Question 151

Which component in an electric circuit limits the current flow?
Electricity and magnetismElectric circuits - Componentseasy

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Question 152

What type of wave is sound in air?
Waves and opticsWave types and propertieseasy

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Question 153

Which of the following best describes a covalent bond?
Matter and materialsChemical bonding - Covalent bondsmedium

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Question 154

During an exothermic chemical reaction, which statement is true?
Chemical changeChemical reactions - Energy changesmedium

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Question 155

A force of 10 N acts on an object causing it to move 3 m in the direction of the force. How much work is done?
MechanicsWork and energymedium

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Question 156

In a series circuit with three equal resistors, how does the total resistance compare to the resistance of one resistor?
Electricity and magnetismElectric circuits - Series and parallelmedium

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Question 157

What is the acceleration of an object in free fall near the surface of the Earth, ignoring air resistance?
MechanicsMechanics - Kinematics and Dynamicseasy

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Question 158

Which of the following correctly describes the relationship between current (I), voltage (V), and resistance (R) in an electrical circuit?
Electricity and magnetismElectricity - Ohm's Laweasy

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Question 159

A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is its speed?
Waves and opticsWaves - Wave properties and speedmedium

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Question 160

Which type of bonding is present in sodium chloride (NaCl)?
Matter and materialsMatter - Types of bondingeasy

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