1P 2011 Flashcards
1
Q
Radio to gamma rays is decreasing…
A
…wavelength.
2
Q
When spinning a coil by hand, why does a lamp light up?
A
Induced current leads to creation of current in lamp.
3
Q
Why is less force needed to close a computer screen?
A
Weight of lid acts in the same direction as closing force.
4
Q
How does aluminium prevent heat loss?
A
Poor radiator and radiation is reflected back inside.
5
Q
Why is all the air removed when shooting alpha particles at a piece of thin gold foil?
A
Reduce chance of collision with air particles. avoid absorption of alpha particles.
