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Learn about and revise energy stores, transfers, conservation, and how to calculate energy changes with GCSE Bitesize Combined Science.
Energy changes when a spring is stretched. The diagram below shows a student before and after a bungee jump. The bungee cord has an unstretched length of 30.0 m. The mass of the student is 60.0 kg. The gravitational field strength is 9.8 N / kg. Calculate: a) The change in gravitational potential energy of the student at 30.0 m.
Energy is measured on Joules (J). Whenever an object is moving, it has energy in its kinetic energy store. The amount of kinetic energy depends on the mass and velocity of the object. You can calculate the amount of energy in an object’s kinetic energy store (\bold {E_k}) using the following formula: E_k = \dfrac {1} {2} m v^2.
Everything you need to know about Changes in Energy for the GCSE Physics (Combined Science) AQA exam, totally free, with assessment questions, text & videos.
In this GCSE Physics AQA Revision Guide, you will find high quality Changes in Energy GCSE Revision Notes and Past Paper Questions
Worksheet and links to video instruction materials for GCSE Physics changes in energy, covering how energy transfers from one store to another, calculation of kinetic, elastic and gravitational potential energy
Use the bond energies in the table to calculate the energy change for this reaction. Learn about exothermic and endothermic reactions and the transfer of energy with GCSE Bitesize Chemistry...
Use our revision notes to learn about energy changes for GCSE Chemistry. Find information on bond energies and complete bond energy calculations.
Specific heat capacity is the amount of energy needed to raise the temperature of 1kg of a substance by 1°C. The higher the value for specific heat capacity, the more energy needed to raise the temperature of the substance. 1. Aluminium has a specific heat capacity of 900J/kg°C.
We can calculate how much energy is required to heat up different objects by a specific amount using the concepts discussed on this page. Different materials need different amounts of energy to increase their temperature. The property that determines this is called the specific heat capacity.