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20 questions
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- Q1Which of the following is NOT a form of heat transfer?ConductionReflectionRadiationConvection30sSC7.SPS.2
- Q2How does heat transfer occur in conduction?Through particle vibrations in solidsThrough the movement of particles in fluidsBy electromagnetic wavesBy energy absorption30s
- Q3Which type of heat transfer is responsible for sea breezes?ConductionRadiationConvectionReflection30s
- Q4How does heat from the Sun reach the Earth?ConvectionAbsorptionConductionRadiation30s
- Q5Why are handles of cooking pans often made of plastic or wood?They are durable.They are insulators and prevent burns.They make the pan lighterThey are cheap.30s
- Q6Which of the following is a good conductor of heat?PlasticWoodSteelRubber30s
- Q7What type of heat transfer occurs when a person sits near a fireplace?Convection onlyRadiation and ConvectionConduction onlyRadiation only30s
- Q8What is thermal conductivity?The rate at which an object cools downThe resistance of a material to heatThe ability of a material to conduct electricityThe ability of a material to conduct heat30s
- Q9What happens to particles in a fluid when they are heated?They sinkThey expand and freezeThey become denserThey rise30s
- Q10Why is aluminum foil used to keep food warm?It is an insulator.It allows heat to escape slowlyIt reflects heat and reduces heat loss.It is easy to wrap.30s
- Q11How much heat is transferred if 200 J of energy is needed to heat a metal rod?250 J200 J150 J100 J30s
- Q12If 150 J of energy causes the water temperature to rise by 5°C, what is the specific heat capacity of the water?0.6 J/g·°C1.0 J/g·°C1.5 J/g·°C1.2 J/g·°C30s
- Q13How much energy is radiated if the temperature difference is 20°C and thermal conductivity is 3 W/m·K over an area of 2 m²?80 J40 J120 J60 J30s
- Q14If it takes 500 J to heat a metal handle by 10°C, what is the thermal conductivity of the handle?2.0 W/m·K1.0 W/m·K5.0 W/m·K0.5 W/m·K30s
- Q15How much heat is needed to transfer through a wall with a conductivity of 0.5 W/m·K if the temperature difference is 15°C and the wall area is 10 m² over a thickness of 0.2 m?200 J250 J150 J375 J30s