Paper 1 Flashcards
(14 cards)
How should you test if two values on a graph are directly proportional?
Repeat the experiment using more values of the independent variable, including larger values.
How can you measure the count rate for two rocks with a GM tube?
Measure separately for the two rocks, Take background count into account, Take an average by repeating.
What is the force that keeps an object in orbit?
Centripetal
Why does CMB radiation show the Big Bang happened?
The big bang was an explosion that released radiation which can still be found all across the universe.
Why do vibrating prongs produce sound?
The vibrating prongs dissipate force into the air particles, causing them to vibrate parallel to the direction of wave travel.
What do different colours of light have?
Different wavelengths and thus travel at different speeds (in mediums like water or glass), meaning they change in direction by different amounts.
What’s the best radiation type to kill cancer?
Gamma
What is a use for infrasound?
Detecting earthquakes.
What should you always include in wave question answers?
Perpendicular/Parallel to the direction of travel.
What does the graphite core and control rods do to control and maintain the chain reaction of nuclear fission?
Slow down the neutrons so they can be absorbed by the uranium nuclei, as if they’re too fast they can simply pass through and not be absorbed. Moveable rods absorb neutrons so fewer or more neutrons can be available for fission.
How can something be observed as it changes over time?
By taking multiple measurements at regular intervals.
How can the mass of a system in motion be kept constant?
Transmitting weights only within the system (weight hanger and trolley)
How can the force of friction be counteracted?
By oiling the wheels/ramp, or inclining the ramp on one end so a constant velocity is applied which counteracts friction.
