Explanation

Heat transfer occurs through conduction, convection, and radiation.

Condensation is a phase change process (gas to liquid).

It is not a heat transfer method.

Explanation

Explanation

The Big Bang occurred approximately 13.8 to 15 billion years ago, marking the origin of the universe.

It led to the rapid expansion of space, eventually forming galaxies, stars, and planets.

Explanation

An ocean current is a continuous, directed movement of seawater.

Ocean current is generated by:

• A number of forces acting upon the water including wind
• The Coriolis effect
• Breaking waves
• Cabbeling
• Temperature and salinity differences.

Additional Information:

Ocean floods:

Coastal flooding occurs when dry and low-lying land is submerged (flooded) by seawater

Cyclone:

Cyclones are caused by atmospheric disturbances around a low-pressure area distinguished and often destructive air circulation.

Tsunami:

Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea.

Explanation

Pressure formula is expressed as P = F/A,

• where P is pressure,
• F is force,
• and A is the area by which the force is applied perpendicularly.

Its SI unit of pressure is Pascal (represented as Pa) 

Definition of Pressure:

 Pressure can be defined as the force acting per unit area.

Explanation

 The unit "poise" (symbolized as P) is a CGS (centimeter-gram-second) unit of dynamic viscosity,

It also known as absolute viscosity, named after French physician Jean Louis Marie Poiseuille. 

Explanation

 Ice blocks are covered with sawdust primarily to provide necessary insulation from heat, preventing them from melting quickly. 

Explanation

The reason is that the rails expand in summer

. The gap is provided to allow for this expansion.

If no gap is left the expansion in summer will cause the rails to bend sideways

This may result in train accidents.

Explanation

 "Meter per second" (m/s) is the standard unit of speed and velocity,

Indicating the distance traveled in meters throughout one second.

It measures how fast something moves (speed) and in what direction (velocity). 

Speed:

Speed is a scalar quantity, meaning it only describes the magnitude (how fast) of an object's movement, measured in meters per second. 

Velocity:

Velocity is a vector quantity, meaning it describes both the magnitude (how fast) and direction of an object's movement, also measured in meters per second. 

Explanation

The human hearing range is typically from 20 Hz to 20,000 Hz.

Sounds below 20 Hz are called infrasound.

Sounds above 20,000 Hz are called ultrasound, both of which are inaudible to humans.

Since 22,000 Hz is above 20,000 Hz, it is an inaudible sound.