Read this passage and answer the questions below - Leaving Cert Physics - Question 11 - 2008
Question 11
Read this passage and answer the questions below.
Energy is essential to the comfort of our homes. There are many ways of reducing energy needs and meeting those ne... show full transcript
Worked Solution & Example Answer:Read this passage and answer the questions below - Leaving Cert Physics - Question 11 - 2008
Step 1
State two uses of energy in the home.
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Answer
Heating (e.g., for space heating or water heating).
Cooking (e.g., using a stove or oven).
Lighting (e.g., for indoor illumination, use of light bulbs).
Step 2
Give two ways to reduce energy needs in the home.
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Insulate the home (e.g., use insulation material in walls and attics).
Double-glaze windows (e.g., install energy-efficient windows to minimize heat loss).
Reduce usage of appliances (e.g., unplugging devices not in use or using energy-efficient appliances).
Step 3
List the main sources of renewable energy.
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Solar energy.
Wind energy.
Wave energy.
Tidal energy.
Geothermal energy.
Biomass.
Step 4
What are the main parts of a solar heating system?
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Solar panel.
Hot water storage cylinder.
Step 5
Why does a solar panel need to face south?
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A solar panel needs to face south to maximize exposure to sunlight during the day for optimal energy absorption.
Step 6
What is the function of the backup heater?
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The function of the backup heater is to provide additional heating to the water in the storage cylinder when solar heating is insufficient, ensuring a continuous supply of hot water.
Step 7
Why are parts of the solar panel painted black?
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Parts of the solar panel are painted black because black is a better absorber of heat compared to other colors, enhancing the efficiency of heat absorption.
Step 8
What is the name given to the tendency of water to circulate as it is heated?
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The name given to this tendency is 'convection.'
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