Energy christmas quiz

Energy transfers at Christmas

​Some text here about the topic of discussion.

Fill in the Blanks

When father Christmas goes down the chimney, his

store decreases.

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When Father Christmas eats a mince pie, he increases his

energy store.

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When Father Christmas climbs back up the chimney, his

energy store decreases.

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When Father Christmas climbs back up the chimney, his

energy store increases.

Multiple Choice

If Father Christmas has a weight of 1000 N and the chimney is 8 m tall, how much work does he do getting back up the chimney?

• 8000 J

• 125 J

• 0.008 J

• 1000 J

Multiple Choice

If the sleigh weighs 60,000 tons (500,000,000 N) and the circumference of the Earth is 40, 000 km, how much work does each reindeer do pulling the sleigh once around the Earth? (assuming 8 reindeer pull the sleigh)

• $$2\times10^{16}$$ J

• $$2.5\times10^{15}$$ J

• $$2\times10^{16^{ }}$$ J

• $$2.4\times10^9$$ J

Multiple Choice

When a child tears open the wrapping paper on their Christmas presents, what type of energy transfer is occurring?

• Mechanical

• Heating

• Waves

• Electrical

Multiple Choice

When the turkey is cooking in the oven, what type of energy transfer is occuring?

• Heating

• Waves

• Mechanical

• Electrical

Multiple Choice

When two people pull a Christmas cracker, what type of energy transfer is taking place?

• Electrical

• Heating

• Mechanical

• Waves

Multiple Select

When the Christmas lights are lit up, what type of energy transfers are taking place?

• Waves

• Electrical

• Work done

• Heating

Multiple Select

When people are watching Christmas movies are on the telly, what type of energy transfers are taking place?

• waves

• heating

• electrical

• work done

Multiple Select

When the children are sledging down the hill, what type of energy transfers are taking place?

• electrical

• heating

• mechanical

• waves

Multiple Choice

Typical LED strings of Christmas lights are 50% efficient. If the bulb consumes 38 J of energy and emits 19 J of it as light, how much energy is wasted as heat?

• 50 J

• 19 J

• 38 J

• 9.5 J

Multiple Choice

Typical incandescent strings of Christmas lights are only 10 % efficient. If the lights use 1925 J of energy, and 1733 J of energy are wasted as heat, how much energy is usefully transferred by the lights?

• 1925 J

• 3658 J

• 192 J

• 1733 J