Required Practical: Investigating Insulation (AQA GCSE Physics): Flashcards

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Required Practical: Investigating Insulation
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Specific heat capacity definition

Energy needed to raise temperature of 1kg of substance by 1°C

Specific heat capacity formula

ΔE=mcΔθ\Delta E = mc\Delta\theta

ΔE\Delta E in ΔE=mcΔθ\Delta E = mc\Delta\theta

Energy transferred (J)

mm in ΔE=mcΔθ\Delta E = mc\Delta\theta

Mass (kg)

cc in ΔE=mcΔθ\Delta E = mc\Delta\theta

Specific heat capacity (J/kg°C)

Δθ\Delta\theta in ΔE=mcΔθ\Delta E = mc\Delta\theta

Temperature change (°C)

3 factors affecting temperature change of substance

Energy supplied, mass, what the substance is

Insulation practical method

Hot water in container, wrap insulation, record temp over time

What to investigate in insulation practical

Type of material or different thicknesses

Insulation error: starting temperature

Different starting temps cause different heat loss rates

Insulation error: container

Heat lost through top/bottom of container

Insulation error: thermometer

Random error when reading thermometer

When does storage heater use electricity

At night (when it is cheaper)

What does storage heater heat

Bricks or concrete blocks

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