physics topic 1

• What is the first topic covered in the video?

  Energy topic of GCSE physics
• Why should viewers pause and take notes during the video?

  To prepare for the GCSE exam
• How many different energy stores are mentioned?

  Eight different energy stores
• Name three energy stores mentioned in the video.

  Kinetic, thermal, gravitational potential
• What happens to a tennis ball's energy when it is dropped?

  Gravitational potential energy converts to kinetic energy
• What is the equation for kinetic energy?

  E = $\frac{1}{2}mv^2$
• What does E stand for in the kinetic energy equation?

  Energy
• What is the equation for gravitational potential energy?

  E = MGH
• What units can gravitational field strength be measured in?

  Newtons per kilogram or meters per second squared
• What is elastic potential energy related to?

  Stretching or compressing materials
• What is the equation for change in energy related to specific heat capacity?

  Change in energy = mass × specific heat capacity × temperature change
• How can you rearrange the specific heat capacity equation?

  To isolate specific heat capacity
• What does the conservation of energy state?

  Energy can only be transferred or stored
• What is power defined as?

  The rate of doing work
• How does convection occur?

  Heat transfer in liquids and gases through particle movement
• What does the efficiency equation represent?

  Useful output energy over total input energy
• What does it mean if a light bulb has 80 Watts output from 100 Watts input?

  It is not fully efficient
• What are renewable energy resources?

  Resources that can be replenished naturally
• What is a disadvantage of renewable energy resources?

  They can be unreliable in certain conditions
• What is a common non-renewable energy resource?

  Fossil fuels
• What happens to voltage in the National Grid during transmission?

  It is increased to reduce energy loss
• What is the purpose of a step-down transformer?

  To decrease voltage for safe home use