How to reduce hazard of radioactive waste
Storage in secure containers (metal or concrete)
Put waste in cooling ponds
Bury underground
Remember to write in RP 6 markers…
Repeat readings and find mean
Remove anomalous results
Why does hair stand up during static electricity
Person’s hairs become negatively or positively charged
… and like forces repel
What is an electric field
The region around a charged object
… in which another charged object experiences a force
μ
nm
1 thousandth
1 millionth
UK mains electrical power supply
Frequency Hz
Voltage V
50 Hz
230 V
Thermistor
https://docs.google.com/document/d/1fGMQJOl-eKnjMU3rmexmW014uu-gfxMBfztPgkXsA_c/edit?tab=t.0
Why does radiation not drop to 0 on graphs when it plataeus
The radiation reaches its maximum range but then the radiation remains above 0 at a constant level because of BACKGROUND RADIATION
Which material can gamma pass through that beta can’t
Aluminium sheet
Safety precautions to reduce radioactive dose
Increase distance between people and radioactive source
Point source away from people
Safety precautions to avoid radioactive contamination
Wear gloves
Wear a lab coat
How to determine activity at fixed point on atom/second graph
Draw tangent
Measured in Bq
Neutral wire
Blue
Completes the circuit
Low pd
Live wire
Brown
Carries alternating pd into appliance
High pd
Direct potential difference meaning
The direction of the potential difference isn’t changing
Solid vs liquid vs gas
S Regular arrangement, vibrate about fixed point
L Random arrangement, move freely, Sill touching, Some order
G Completely disordered, particles far apart
How are solar power and hydro electric power together a reliable energy source
Solar power output greater in summer, Hydroelectric power output greater in winter
… So less variation
Why are wind turbines a bad energy source
Unreliable
Wind turbines don’t turn when wind is weak
Why is oiling mechanical parts good
Reduces friction so less energy is wasted
Equipment for measuring mass of irregular shape
Eureka can
Why is repeating an experiment important
Allows for mean calculation which reduces effect of random errors
What can be a cause for error in measuring cylinders and some thermometers
Parallax error (viewing angle)
Why would holding a rod over another with like charges on a scale increase the mass
Like charges repel so there is an added force on the scales
Why would a negatively charged rod produce a spark when placed near a earthed conductor
Large pd between conductor causes electrons to move from rod to conductor
