# School certificate Australia Yr 10 2004 notes devised from the board of studies syllabus.

Essay by lancaster12High School, 10th grade November 2004

study notes

school certificate Australia Yr 10 2004 notes devised from the board of studies syllabus.

topic 1

a) identify waves as carriers of energy

A wave is a periodic disturbance which travels through a medium and carries energy from one place to another. As the wave travels through the medium, particles vibrate around their mean or equilibrium positions but undergo no net displacement

b) qualitatively describe features of waves

including frequency, wavelength and

speed

Waves require a medium to flow through and cannot travel in a vacuum.

ÃÂ·Wavelength is the distance between successive identical points in the direction of propagation of the wave(ie. Distance between successive crests)

ÃÂ·Amplitude is the maximum displacement of a particle from the mean or equilibrium position

ÃÂ·Frequency is the number of waves passing a given point in one second

ÃÂ·Period is the time for one wavelength to pass a given point

ÃÂ·Speed(Velocity) is the distance travelled by the wave in its propagation direction in one second, measures in ms-1

c) give examples of different types of radiation that make up the electromagnetic spectrum and identify some of their uses Visible light is only a small part of the

electromagnetic spectrum (or EMR).

Different regions of EMR have different wavelength and frequency values, but all travel at the same speed (speed of light 3.0x108 ms-1)

ÃÂ· Infrared light

ÃÂ· Visible light

ÃÂ· X-rays

ÃÂ· Gamma rays

5.6.2 Newton's Laws-motion to:

a) describe qualitatively the relationship

between force, mass and acceleration

ÃÂ·Newton's second law is; when an unbalanced eternal force acts on an object, the resultant acceleration produced is directly proportional to the force and inversely proportional to the mass, mathematically;

ÃÂ·F=ma where

m=mass of object (kg)

a= acceleration of object (ms-2)...