Kuiz Fizik Tingkatan 5 Bab 2 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 2 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

A siphon is used to move water from one bucket to another at a lower level. The flow will stop if…

the bend at the top of the siphon is perfectly horizontal

both buckets are placed in a vacuum.

the diameter of the tube is too large

None

A dam is constructed to be much thicker at its base than at its top. What is the primary physical principle that explains this design choice?

The density of water increases with depth, requiring stronger support.

The total volume of water in the reservoir determines the force on the dam wall.

Atmospheric pressure combined with water pressure is greatest at the bottom.

Liquid pressure is directly proportional to depth, so the force exerted by the water is greatest at the base.

None

What is the primary reason mercury is used in barometers and manometers instead of water, despite its toxicity?

Mercury is cheaper and more readily available than purified water.

Mercury does not evaporate at room temperature, unlike water.

Mercury is significantly denser, allowing for instruments of a practical, manageable height.

Mercury is a metal and conducts electricity, which is needed for the device to work.

None

Deep-sea submersibles are built with thick, rounded hulls, typically made of steel or titanium. This design is primarily to withstand…

the extremely low temperatures found at the bottom of the ocean.

the high internal pressure required to keep the crew alive.

the buoyant force pushing the submersible to the surface.

the extremely high external pressure of the deep ocean.

None

Why does atmospheric pressure decrease as altitude increases?

The force of gravity becomes significantly weaker at higher altitudes.

The air gets colder at higher altitudes, causing it to contract and exert less pressure.

The percentage of oxygen in the air decreases with altitude.

There is a shorter and less dense column of air above, which exerts less weight.

None

A hydrometer is placed in two different liquids, A and B. It floats with more of its stem submerged in liquid A than in liquid

Liquid B is denser than liquid A.

The hydrometer’s weight is different in each liquid.

Liquid A is denser than liquid B.

Liquids A and B have the same density.

None

In a hydraulic jack, a force of 200 N is applied to an input piston with a cross-sectional area of 0.02 m2. If the output piston has a cross-sectional area of 0.8 m2, what is the maximum load (force) that the jack can lift?

4000 N

8000 N

5 N

200 N

None

How does the aerofoil shape of an airplane wing generate lift according to Bernoulli's principle?

The engines create a vacuum above the wings which pulls the aircraft into the air.

Air travels faster over the curved top surface, creating a region of lower pressure compared to the bottom surface.

Air travels slower over the curved top surface, creating a region of higher pressure that pushes the wing up.

The wing pushes air downwards, resulting in an equal and opposite reaction force pushing the wing upwards.

None

A diver is at a depth of 30 m in a freshwater lake. What is the approximate gauge pressure they experience? (Use density of fresh water ρ=1000 kg m−3 and g=9.8 m s−2).

101 kPa

294 kPa

394 kPa

29.4 kPa

None

10.

When a submarine takes on water into its ballast tanks, what is the effect on the forces acting on it?

Its total weight increases, causing it to become greater than the buoyant force, so it sinks.

The buoyant force decreases because the submarine becomes heavier.

The buoyant force increases because the submarine’s volume has increased.

Its total weight decreases, allowing it to sink faster.

None

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