Practice Questions
1.What is the formula for work done?
Work done,W = Force,F x distance,s
2.What is the difference between Nm and N/m? Which unit should you use for work done?
Nm = Newtons x metres, these are the units for work done
N/m = Newtons divided by metres.
3. Describe how energy is transferred when friction occurs between two objects.
When friction occurs between two surfaces that are rubbing together, the kinetic energy store is converted to thermal energy store. So, temperature of the material increases
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