Answers to AQA GCSE Wasted energy
Answers to Practice Questions
1.For each of the following examples, state the useful output energy and the wasted output energy:
Useful energy output:
Thermal energy store of the air increases
Kinetic energy store of the air increases
Wasted energy output:
Energy is transferred by radiation as sound waves from fan in hair dryer to the surroundings
Energy is transferred by heating, to cause the thermal energy store of the hair dryer case to increase
Useful energy output:
Energy is transferred by radiation as light waves
Wasted energy output:
Energy is transferred by radiation to the thermal energy store of the surroundings.
Useful energy output:
Kinetic energy store increases as the motor arm rotates
Wasted energy output:
Thermal energy store of the motor increases
Energy is transferred by radiation as sound waves to the surroundings
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations