P:1 Energy Paper 1
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Write a Definition of Energy Store?
• Energy Store Means by which an object stores energy.
Name the 8 Energy Stores and explain them?
• 1) Kinetic - Anything Moving has kinetic energy store. • 2) Thermal - The Hotter the object the more energy in its store. • 3) Chemical - Anything That Releases energy by a chemical reaction. • 4) Gravitational Potential - any Object raised above ground level has this energy store in them. • 5) Elastic Potential - anything stretched has this energy store in them. • 6) Electrostatic - 2 charges that attract or repel each other. • 7) Magnetic - 2 magnets that attract or repel each other. • 8) Nuclear - The nucleus of an atom resales energy like this.
What’s The Acronym To Remember the 4 Ways energy can be transferred?
• M - Mechanically • E - Electrically • H - Heating • R - Radiation
How do Objects mechanically transfer Energy and give a Example?
• This happens when a force does work on an object. • For Example: a Force pushing an object along the floor.
How do Objects Electrically transfer energy and give a example?
• This Happens when a moving charge does work. • For Example:When Current flows through a light bulb.
How do Objects Transfer Energy by Heating and Give a Example?
• When Energy is transferred from a hotter object to a colder object. • For Example:When a Pan of water is heated on a hob.
Write a Definition of System?
• System is the Object or group of objects you are considering.
What Happens when a System Changes and Write a Definition of a Closed System?
• When a System changes the Way energy is stored changes. • A Closed System is a system Where neither matter nor energy can enter or leave.
The Net Change in (______________________________) in a closed system is always (______)
• Total Energy and Zero
Give a Example of a Closed System and how is energy transferred?
• For Example: A Cold Spoon sealed in a flask of hot soup in a closed system. • Energy is Transferred from the thermal energy store of the soup to the thermal energy store of the spoon by heating.
What is The Conservation of Energy Principle?
• Energy can be Transferred usefully stored or Wasted but can never be created or destroyed.
Write a Definition of a Force?
• Force is a Push or pull on an object caused by it interacting with something.
What Happens if a Force moves a Object and How is Energy then Transferred?
• If a Force moves an object then work is done. • Work done is the same as energy transferred. • So energy is transferred mechanically when a force moves and object.
How is Energy transferred into to Kinetic Energy store and How is it transferred away?
• Energy is Transferred To kinetic energy store When a Object speeds up. • Energy is then transferred away from this store when an object slows down.
What unit is all energy stores measured in?
• Joules (J)
What’s the Formula For Kinetic Energy?
• 0.5 x Mass (kg) x (Speed)² (m/s)
How does Gravitational potential energy store Occur?
• All objects raised above the ground gain energy in their gravitational potential energy.
Whats The Equation for Gravitational potential?
• Mass (kg) x Gravitational field Strength (N/kg) x Height (m)
What Does the the conservation of energy say about gpe and kinetic energy?
• When a Object falls from the sky or a high place energy is lost from the GPE store and Energy gained in the kinetic energy store.
(_______________) or (______________) an object can transfer energy to its (_________________________________)
• Stretching,Squashing and Elastic Potential energy store.
Whats The equation for elastic potential energy?
• 0.5 x Spring constant (N/m) x (Extension)² (m)
How can Energy be Transferred by heating and what does it cause?
• As a material is heated energy is transferred to its thermal energy store. • This causes its temperature to rise.
(For Example:boiling water in a kettle) how can energy be stored when the kettle is heated?
• 1) Energy is Transferred Electrically to the thermal energy store of the kettle heating element. • Energy is then Transferred by heating to the waters thermal energy store. • So the temperature of the water will increases.
What do Different materials need more of and how do they transfer energy?
• Some Material Need more energy to increase their temperature than others. -These materials also transfer more energy when they cool down again. • They can store a lot of energy.