Heat PHYSICS - Heat

• A
  conduction only
• B
  convection only
• C
  radiation only
• ✓
  conduction and convection

Answer: D.

• A
  sideways
• B
  downwards
• ✓
  upwards
• D
  in all directions

Answer: C.

• A
  conduction
• ✓
  convection
• C
  radiation
• D
  conduction and radiation

Answer: B.

• A
  lron rims are cooled before they are placed on cartwheels
• B
  A glass stopper gets tight on warming the neck of the bottle
• C
  Telephone wires sag in winter, but become tight in summer
• ✓
  A little space is left between two rails on a railway track

Answer: D.

• A
  water
• ✓
  mercury
• C
  air
• D
  none of the above

Answer: B.