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PEC (Sec) Concluding Activity Flashcards | StudBud
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PEC (Sec) Concluding Activity
PEC (Sec) Concluding Activity
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Practice quiz
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Questions
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Answers
1
Adding salt to water will increase its surface tension
True
False
2
What is the name of the Physics Enrichment Camp Director?
Jediael
Joshua
Qing Hai
Jiang Bin
3
Which of the following has the lowest surface area per kg?
Fine Salt
Lollipop
Fine Sugar
Coarse Salt
4
A negatively charged rod will repel a stream of water, while positive charged rod will attract a stream of water
False
True
5
How do the speed and airtime of “Dart” compare with “Glider” in theory?
Slower, Longer
Faster, Longer
Faster, Shorter
Slower, Shorter
6
What is the correct expression for Newton's Law of Gravitation?
F=\frac{Gm_1m_2}{r^2}
F=qE
F=ma
F=\frac{mv^2}{r}
7
Which of Newton's Laws of Motion related to flight is mentioned during Flight Fantasia?
Fourth Law
Second Law
First Law
Third Law
8
What is the minimum number of lens required to make a telescope?
4
1
2
3
9
What substances are mentioned in the sources as being fluids and exhibiting the Coanda Effect?
Only water
Solids and gases
Only air
Air and water
10
Which of the following can physicists end up into
Bank (Finance)
Professors
Biology
Weather sector (NEA)
11
Silicon is an example of
Metal
Semiconductor
Superconductor
Non-metal
12
In the Coanda effect, how does the fluid get pulled towards and stick to a curved surface?
The fluid undergoes a chemical reaction
Fluids speed up, create low pressure and get pushed by higher pressure zone
The surface creates static electricity to attract the fluid
The surface creates suction
13
How many specializations are there in NUS Physics
1
2
4
3
14
How far is the Moon from Earth?
About 3.8 million km
About 1.5 million km
About 38,000 km
About 384,000 km
15
According to Bernoulli's principle, when the speed of a fluid increases, what happens to its pressure?
Remain the same
Decrease
Change randomly
Increase
16
What is the Mass of the Earth?
6.02\times10^{23}kg
5.97\times10^{24}kg
9.81\times10^3kg
1.99\times10^{30}kg
17
Mentos have dents on its surface that act as nucleation sites
False
True
18
Which force is not found in the Standard Model of Particle Physics?
Electromagnetic Force
Gravitational Force
Weak Nuclear Force
Strong Nuclear Force
19
Who said 'God does not play dice with the universe'?
Einstein
Oppenheimer
Max Planck
Born
20
Surface tension resists expansion
False
True
21
Ion spray painting works by
Using ionized air to clean the surface before regular painting
Heating the paint until it becomes a gas that bonds to the surface
Freezing paint droplets so they stick better to the surface
Charging paint particles so they are attracted to a grounded object
22
When you add a mentos into soda drink, it will explode because
The Mentos absorbs all the liquid, creating a vacuum that bursts the bottle
The surface of the Mentos causes rapid release of carbon dioxide gas
The Mentos contains chemicals that react violently with sugar
The Mentos freezes the soda, causing a sudden expansion
23
Which of the following is not a Conservation Law?
Conservation of Energy
Conservation of Entropy
Conservation of Mass
Conservation of Momentum
24
The Coanda effect describes the tendency of fluids, like air or water, to flow in what way?
Float upwards
Turn into a solid
Adhere to and follow a curved surface
Follow a straight path
25
When salt water is placed in pure water, the salt water will expand at the surface
False
True
26
What is the first 4 digits of the speed of light in vacuum?
2.998
3.000
2.997
3.001
27
Which of the following is not a law of light?
Refraction
Diffusion
Dispersion
Reflection
28
Which of the following particles is not present in an atom?
Neutron
Electron
Proton
Positron
29
Which of the following is not a Ferromagnetic Element?
Nickel
Copper
Cobalt
Iron
30
How is lift generated for paper planes?
Propulsion
The Coanda Effect
Air deflection
Pressure difference
31
If parallel light that passes through the lens is not horizontal, then it will not focus at the focal plane
True
False
