Practice Questions
1.Calculate the weight of a tennis ball that has a mass of 45g. Assume g = 9.8N/kg
Convert the 45g into kg
45/1000 = 0.045kg
W = m x g
W = 0.045 x 9.8 = 0.44N
2. On Planet ABCD a man has a weight of 2000N and a mass of 100kg. Calculate the value for gravitational field strength for planet ABCD.
g = W/m
g = 2000/100
g = 20N/kg
3. Calculate the mass of an object that has a weight of 5000N on Earth, when g = 9.8N/kg
m = W/g
m = 5000/9.8
m = 510kg
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