Science Club SYS Sem3 (Hard)

What contributes to the different colours of firework?

• Temperature of the fuel

• Atmospheric pressure at the moment of explosion

• Ignition and combustion of chemical dyes

• Different composition of chemical burning in the air

In a firework, oxidizers are chemicals that oxidises other chemicals.

Which of the following is an example of oxidizer?

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What is the purpose of fuel in a wirework?

• To create different colour in the night sky

• Act as catalyst in the Redox reaction

• To create a heat output

• Provide additional light during the explosion of wirework

Label the missing part

• Airways

• Effects pellets

• Fuel

• Sand

What is the colour of the flame when copper oxide is ignited in air?

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In a firework, the chemicals are ignited and heated. The reason why there are bright colours is due to?

• The atom in the firework chemicals releases extra energy and emits light with specific wavelength

• The chemical releases electrons and emits light

• Radioactive waves are emitted from the chemicals when it is ignited at high temperature

• Vibration of the electron causes it to emit light rays

What is this safety equipment called?

• Face mask

• Glove

• Safety Goggles

• Lab coat

The mechanic of allowed standing waves is similar to the concept of?

• Simple Harmonic Motion

• Quantum Mechanics

• Nuclear physics

• Optics and Rays

In a standing wave, the points of which crest and trough intersects (At 0 amplitude) are known as?

• Wave pulse

• Critical point

• Compression point

• Nodes

The combination of standing waves creates certain frequency that sounds pleasant to our ear. This is most commonly utilized in...

• Music

• Telecommunication

• Quantum computing

• Harmonic waves