energy

• Name three energy stores mentioned in the video.

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

  It decreases as kinetic energy increases
• What is the equation for kinetic energy?

  E = $\frac{1}{2}MV^2$
• What does the variable 'M' represent in the kinetic energy equation?

  Mass of the object
• What is the equation for gravitational potential energy?

  E = MGH
• What does 'G' represent in the gravitational potential energy equation?

  Gravitational field strength
• What is elastic potential energy related to?

  Stretching or compressing materials
• What is specific heat capacity?

  Energy to raise 1 kg by 1°C
• What is the equation for calculating change in energy using specific heat capacity?

  Change in energy = mass × specific heat capacity × temperature change
• What does the specific heat capacity unit depend on?

  Mass and temperature change
• What is the conservation of energy principle?

  Energy cannot be created or destroyed
• How does power relate to work done?

  Power is the rate of doing work
• What is conduction?

  Heat transfer in solids through particle vibration
• What is convection?

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

  Useful output over total input energy
• What is a common non-renewable energy resource?

  Fossil fuels
• What is a pro of renewable energy resources?

  They will never run out
• What is a con of renewable energy resources?

  They can be unreliable
• What is the function of the National Grid?

  Distributes electricity across the country
• What is the role of a step-up transformer in the National Grid?

  Increases voltage to reduce energy loss
• What happens to voltage when electricity reaches homes?

  It is decreased to a safe level
• How does energy transfer occur when a tennis ball is dropped?

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

  Not explicitly provided in the material
• What is the significance of the spring constant in elastic potential energy?

  It determines how easily a material stretches
• What is the definition of specific heat capacity?

  Energy required to raise 1 kg by 1°C
• What is the relationship between energy and temperature change in specific heat capacity?

  Energy increases with temperature change
• How does the conservation of energy relate to energy resources?

  Energy resources are transformed, not created
• What is the impact of insulation on energy efficiency?

  It reduces unwanted energy transfers
• What is the main disadvantage of non-renewable energy resources?

  They can run out over time
• How do wind turbines generate energy?

  They convert wind energy into electricity
• What are the pros and cons of renewable energy resources?

  Pros: renewable, less environmental damage; Cons: unreliable
• What is the role of the step-down transformer in the National Grid?

  It decreases voltage for safe home use
• What is the main purpose of the National Grid?

  To distribute electricity efficiently
• How does energy conservation apply to the universe?

  Total energy remains constant since creation
• How does the efficiency of a light bulb relate to energy input and output?

  Efficiency measures useful output versus input
• What is the significance of energy efficiency in everyday appliances?

  It reduces energy waste and costs
• What is the relationship between energy and work done?

  Energy is equivalent to work done
• What happens to energy when it is dissipated?

  It is lost to the surroundings
• How do renewable and non-renewable energy sources differ in terms of environmental impact?

  Renewable sources cause less environmental damage
• What is the effect of temperature on the kinetic energy of particles?

  Higher temperature increases particle kinetic energy