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NSC Physical Sciences – South Africa

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Question 131

When light passes through a narrow slit and spreads out, what is this phenomenon called?
Waves and opticsWaves and opticshard

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Question 132

Which of the following is a characteristic of an endothermic reaction?
Chemical changeChemical changehard

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Question 133

What is the acceleration of a 10 kg object subjected to a 50 N force in the absence of friction?
MechanicsMechanics - Newton's Lawseasy

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Question 134

Which of the following best explains why a current-carrying wire experiences a force in a magnetic field?
Electricity and magnetismElectricity and magnetism - Magnetic effects of currentmedium

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Question 135

A beam of light passes from air into glass with a refractive index of 1.5. What happens to the speed and wavelength of the light?
Waves and opticsWaves and optics - Refraction of lightmedium

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Question 136

Which substance is an example of a covalent network solid?
Matter and materialsMatter and materials - Types of solidseasy

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Question 137

During a chemical reaction, the total mass of reactants and products is always the same. This is due to:
Chemical changeChemical change - Laws of chemical combinationeasy

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Question 138

A projectile is launched horizontally from a height h with velocity v. Which of the following describes the vertical motion?
MechanicsMechanics - Projectile motionmedium

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Question 139

Which of the following statements about resistance in a wire is true?
Electricity and magnetismElectricity and magnetism - Resistance and resistivitymedium

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Question 140

Which wave property determines the color of visible light?
Waves and opticsWaves and optics - Properties of waveseasy

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