Explanation

Explanation

An atom is a particle of matter that uniquely defines a chemical element

 It also is the smallest unit of matter 

Explanation

Sukkur Barrage Located in Sindh Province

Sukkur is the oldest barrage in Pakistan.

7 canals take off from Sukkur Barrage

Sukkur Multan motorway is known as M5

ND18-9-2023

Explanation

Radioactivity was discovered by Henri Becquerel in 1896.

Antoine Henri Becquerel was a French engineer, physicist, Nobel laureate, and the first person to discover radioactivity. 

ND18-9-2023

Explanation

Physics is the study of matter, energy and the interactions between them.

It includes the study of mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.

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It deals with the study of the Interaction between matter and energy

Physics is the scientific study of physical phenomena like the motion of matter and energy and force.

It helps us to understand the world around us.

Physics is the most fundamental part of science.

Explanation

Potential divider is a circuit that gives us continuously varying potential.

Examples of the potential dividers are Rheostat and Potentiometer

Explanation

now is an adverb that means: at the present time or moment.

ND18-9-2023

Explanation

In Carbon dioxide, carbon and oxygen will always combine in a ratio of 3:8 by mass.

Explanation

step: 3165

s = 3

t = 1

e = 6

p = 5

pets: 5613

ND18-9-2023

Explanation

Longitudinal waves cannot be polarised.

This is because the transverse wave can vibrate in all directions and is perpendicular to the direction of propagation.