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The main reason for making the cover of a vacuum flask airtight is to prevent...

Physics
JAMB 2000

The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

  • A. convection
  • B. conduction
  • C. radiation
  • D. evaporation
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Correct Answer: Option A
Explanation

The airtight stopper prevents heat loss by convection because it is tightly sealed.

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Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid