Explanation

Electromagnetic waves, like light and radio waves, do not require a medium to propagate.

They can travel through a vacuum, unlike mechanical waves which need a medium like air, water, or solids. 

Explanation

Inertia is the property of an object to resist changes in its current state of motion,

Meaning it wants to stay still if it's at rest, or continue moving at a constant speed and direction if it's already moving, unless an external force acts upon it. 

Explanation

The SI unit of moment of force, also known as torque, is the newton-meter (N⋅m).

It is a derived unit representing the rotational effect of a force. 

Explanation

 A plane mirror forms a virtual, erect, and laterally inverted image.

The image is also the same size as the object

It is located at the same distance behind the mirror as the object is in front. 

Explanation

Use distance formula:  

D = √[(x₂ - x₁)² + (y₂ - y₁)²]  

= √[(4 - 1)² + (6 - 2)²]  

= √[9 + 16] = √25 = 5

Explanation

The SI unit of magnetic field is Tesla, represented by the symbol T. 

A magnetic field is a region around a magnet or a moving electric charge where a magnetic force can be detected.

The strength of this field is measured in Teslas, which is equivalent to Weber per square meter (Wb/m²). 

Explanation

A Newton per meter (N/m) is the SI unit of surface tension.

It represents the force per unit length acting parallel to the surface and perpendicular to a line on the surface of a liquid.

In simpler terms, it describes the strength of the "elastic membrane" effect at the surface of a liquid. 

Explanation

The general formula for gravitational potential energy (U) is U = mgh, 

m: Mass of the object, typically measured in kilograms (kg).

g: Acceleration due to gravity, approximately 9.8 m/s² on Earth.

h: Height of the object above a reference point, usually the ground, measured in meters (m). 

Potential energy is measured in Joules (J). 

The formula calculates gravitational potential energy,

It is the energy an object possesses due to its position in a gravitational field. 

Explanation

Absolute zero, the lowest possible temperature, is -273.15 degrees Celsius.

It is the point at which all molecular motion theoretically stops. 

Explanation

A device that is used to convert AC voltage into DC voltage is called A Rectifier.

Inverters and rectifiers are electronic circuits that can change the type of electric current.

a rectifier converts AC to DC.