The sound pattern is developed by picking up soun
d through a microphone and producing a varying c
urrent which represents sound. The current (or ele
ctron flow) is converted into light which is recorded
on the film.
When the film is projected in the thea
Development of Western science is based on two
great achievements: the invention of the formal
logical system (in Euclidean geometry) by the
Greek philosophers, and the discovery of the
possibility to find out causal relationships by
A motorcyclist goes on a road trip and travels 25
km [E] and then 30 km [W] in a total time of two
hours. Determine the:
a) net displacement, total distance, and final
b) average speed and average velocity.
vector arrows could also
All things are parts of one single system, which is called Nature; the individual life is good when it is in
harmony with Nature. Zeno, 4th century B.C.
Zeno's Challenge to the Ancient Philosophers
Activity 1: Describing and Classifying Motion
Before continuing, be sure to check the Assessment and Evaluation
document in your FirstClass classroom for further instructions.
Global Positioning System: Advantages and Disadvantages
The Global Positioning System is a navigation system. It is a network of 24 satellites
placed into orbit by the U.S. Department of Defense.GPS satellites circle the earth twice a day. It
Light as a Particle Answers
Arrange light beams of the colours red, green and violet in order of increasing
Red has the longest wavelength. Using f = v/, red has the smallest frequency.
Using E = h
11Magnetism and Electromagnetism
If you have two identical iron rods, only one of which is a bar magnet, explain
how you could determine which is which without using any other material or
The iron bar magnet will have N and S poles,
vi) The maximum kinetic energy, Ekmax, of
hotoelectrons is not affected by light brightness (i
ntensity). Consider the equation
, that rel
ates charge on the electron
with energy (this E can be Ek).
An electron gun will accelerate an electron t
EMR Wave Questions
The electric fields are changing in the following diagrams. Draw in the current
and induced magnetic fields:
The magnetic fields are changing in the following diagrams. Draw in the current