6 Mark Questions I Done Fucked Up Flashcards
Are people in government right to worry about the risks of the different types of nuclear waste and how they are disposed of?
Radioactive waste emits ionising radiation. This damages or kills living cells and may cause cancer. Radioactive materials become less radioactive over time. High level radiation includes spent nuclear fuel rods. This is very radioactive and is embedded in glass stored underwater. Intermediate level radiation is material used to handle fuel rods. This is less radioactive and a medium risk. This is sealed in concrete blocks and placed in steel canisters underground. Low level waste is medical waste and protective clothing. This is low risk and is buried in a landfill. Not all radioactive waste is hazardous. Waste can be radioactive for a long time and those at risk may not benefit the most from the risk.
Amir is running. Describe how running before he jumps increases the distance of his jump.
When Amir runs, friction between his feet and the ground allows for him to push against this opposing force and accelerate forwards. Through running, his velocity increases and therefore he has more momentum, making it harder for opposing forces such as friction to stop him. The resultant force acts forward. As he jumps, he exerts a downwards force on the ground, causing the ground to exert an equal and opposite reaction force, giving him upwards momentum. When he jumps, with the velocity and momentum from the running, it takes longer for gravity to pull him down and for air resistance to overcome the driving force, causing him to cover a greater distance than the distance he would cover without this momentum. Consider the rocket model - by exerting a force on the gases, the gases exert an equal and opposite force, making the rocket accelerate up.
