Advertisement Remove all ads

Draw a neat and labeled diagram of a vacuum flask (thermos flask). Explain, how it minimizes loss of heat by preventing conduction, convection and radiation. - Physics

Short Note

A spiral cut from a thick chart paper is pivoted at 0 and is held slightly above a burning candle You will notice that the spiral starts moving. Explain.

Advertisement Remove all ads

Solution

The spiral starts moving because due to the flame of the candle the spiral heats up and expands. While expanding, the spiral tries to create space for the extension in length, and an outward pull is created which causes the spiral to move.
Concept: Temperature
  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Exercise | Q 65 | Page 230
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×