Physics

• What is the definition of density?


  How much mass is in a given volume
• How can you reduce conduction?

  -Use a vacuum (no particles => no conduction)

  -trapped air as it is a bad conductor e.g double glazing, vacuum flasks, clothes/duvet
• What are the properties of liquids?

  -particles are still touching but can move around

  -can be poured

  -takes the shape of a container

  -cannot be compressed
• The higher the thermal conductivity of a material... the higher the rate of energy transfer by conduction across the material.
• What do we use to see infrared?

  thermal image cameras