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WAEC Physics – Liberia

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Question 191

What property of a material does Young's modulus measure?
ElasticityElasticityeasy

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Question 192

At what temperature on the Celsius scale does water boil at standard atmospheric pressure?
Temperature and heatTemperature and heateasy

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Question 193

Which wave property determines its pitch in sound waves?
Waves and oscillationsWaves and oscillationsmedium

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Question 194

In an electric circuit, what is the unit of electric current?
Electricity and magnetismElectricity and magnetismeasy

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Question 195

Which of the following types of radiation has the greatest penetrating power?
Nuclear physicsNuclear physicshard

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Question 196

Which of the following correctly describes simple harmonic motion (SHM)?
Simple harmonic motionSimple harmonic motionmedium

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Question 197

A wire of length 2 m and cross-sectional area 1 mm² is stretched by a force of 10 N. If Young's modulus of the material is 2 × 10¹¹ Pa, what is the extension produced?
ElasticityYoung's modulushard

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Question 198

Which of the following best explains why a liquid exerts pressure on the walls of its container?
Pressure and fluidsPressure in liquidsmedium

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Question 199

Which of the following colors of visible light has the shortest wavelength?
LightLight and visible spectrumeasy

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Question 200

In a nuclear reaction, a uranium-235 nucleus absorbs a neutron and splits into barium-141, krypton-92, and neutrons. Which principle is conserved in this reaction?
Nuclear physicsNuclear reactions and conservationhard

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