Physics

• Explain why the blue object appears black when a red filter is placed in front ?

  -Only red is transmitted by filter

  -Red is absorbed by blue object

  -No light is reflected by blue object
• Explain how a star can be stable?

  The inward force(gravitational force) is equal to the outward force(Fusion)
• What is the latent heat of vaporisation?

  -Latent heat of vaporisation is the energy required to change 1 kg of a substance from a liquid to a gas at its boiling point, without changing its temperature.

  -This energy is used to overcome the intermolecular forces between the liquid molecules, allowing them to escape as gas
• Why would the pressure inside of the syringe walls decrease when the volume of gas decreases?

  -More time between collisions of syringe

  -less frequent collisions between particles

  -causing lower average force on walls
• Why would solar panels be an unreliable source of energy in the UK?

  -A really large area of land would be needed

  -Number of hours of light is low.
• Why would an instrument with higher resolution be better than one with lower resolution?

  Less chance of misreading/ no parallax error
• What is the error called when something is misread?

  Parallax error