Kuiz Fizik Tingkatan 5 Bab 2 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 2 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

An object with a weight of 20 N is fully submerged in a fluid. If the buoyant force acting on it is 25 N, what will be the subsequent motion of the object when released?

It will sink to the bottom.

It will remain suspended at its current depth.

It will move upwards at a constant velocity.

It will accelerate upwards towards the surface

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?

8000 N

5 N

4000 N

200 N

None

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

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

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

Mercury is cheaper and more readily available than purified water.

Mercury does not evaporate at room temperature, unlike water.

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

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

the buoyant force pushing the submersible to the surface.

the high internal pressure required to keep the crew alive.

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

the extremely high external pressure of the deep ocean.

None

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

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 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 A is denser than liquid B.

Liquid B is denser than liquid A.

The hydrometer’s weight is different in each liquid.

Liquids A and B have the same density.

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).

29.4 kPa

394 kPa

294 kPa

101 kPa

None

10.

A U-tube manometer is connected to a gas tank. The liquid in the manometer is pushed down on the gas tank side and is 40 cm higher on the side open to the atmosphere. What can be concluded about the gas pressure?

The gas pressure is less than the atmospheric pressure

The gas pressure is equal to the pressure exerted by the 40 cm liquid column.

The gas pressure is equal to the atmospheric pressure.

The gas pressure is greater than the atmospheric pressure.

None

1 out of 10