Group+3

Members: Daniel Kiong Gladys Tammie Jianzhi Lutfil

Answer for discussion questions: __Lesson 1__ 1. Energy

2.a) Transverse wave b) Longitudinal wave c) Longitudinal wave

3.Transverse wave: Light wave. Longitudinal wave: Sound wave,

4.Transverse wave travel in a direction of **__perpendicular__** to the direction of the vibrations Longitudinal wave travel in a direction of **__parallel__** to the direction of vibrations

__Lesson 2__ 1.(i) Peak (ii) Trough (iii) Amplitude (iv) Wave Length

2.(i) Transverse (ii) The Crest are Point A and D. The Trough are Point B and F. (iii) Point E (iv) 1cm (v) 2cm

Firstly, thanks the government, MS WEE, for employed the TOP scientist group in Chestnut Drive Secondary School to destroy an alien who has created problem to the 'SCHOOL' After doing some research about the alien, we had found out that the alien are sensitive to the light and sound. It is the only way to destroy the alien through using light and sound as both of it have wave which contain high frequency and amplitude. The frequency is the number of the highest point of the wave or troughs that pass a point per second and the amplitude is the maximum displacement from the rest position of the wave. Both frequency and amplitube contain a huge amount of energy that can easily destroy the alien. But, with the information provided by the government, the alien was able to move about 500 m/s, With the speed given for the alien, it's definitely not easy to deal with the alien although we have the "POWER" of dealing him. So, my scientist came out with an idea to get close with the alien, so that we manage to destroy him. We'll install the hollow bar around the school and removed all the roof of the school, so that we can use helicopter to shine ultra violet light beams on the school and set a trap to entice the alien to the school. Once the alien was in the school trying to create problems, we'll immediately hit the hollow bars with another to create sound and shine on the area that the alien appear.