Explanation

Scientists know that the core is metal because:

The density of Earth's surface layers is much less than the overall density of the planet, as calculated from the planet's rotation.

The interior must be denser than average if the surface layers are less dense.

Explanation

An analog signal is a voltage, current, or physical quantity that continuously and infinitely varies in accordance with some time-varying parameter.

For example, radio waves, television waves, or sound waves are all examples of analog signals.

Explanation

The UN Conference on Trade and Development (UNCTAD) named Egypt as the top investment destination in Africa for 2023,

Egypt's FDI increased to $11 billion in 2023, due to an increase in cross-border mergers and acquisitions

Explanation

Cell biology  is a branch of biology that studies the structure, function, and behavior of cells.

All living organisms are made of cells.

also cellular biology or cytology

Explanation

• Coal, fossil fuels, crude oil, natural gas, etc are all hydrocarbon fuels.
• These are called as non-renewable source of energy because they take millions of years to regenerate themselves.
• Water energy is renewable because it is regenerated by water cycle.
• Also wind energy and solar energy are renewable sources of energy.

Explanation

A line printer prints one entire line of text before advancing to another line.

Most early line printers were impact printers.

Line printers are mostly associated with unit record equipment

Explanation

حضرت حمزہ بن عبد المطلب ﷺکے چچا اور رضاعی بھائی ہیں

دونوں نے ثویبہ جو ابو لہب کی لونڈی تھی کا دودھ پیا تھا

Explanation

The Paris Agreement is a legally binding international treaty on climate change.

the Paris Agreement is also known as (COP21) 

2015 conference was to achieve, for the first time in over 20 years of UN negotiations, a binding and universal agreement on climate.

It was adopted by 196 Parties at the UN Climate Change Conference in Paris, France, on 12 December 2015

Explanation

The Paris Agreement, signed in 2015, is a global agreement that aims to limit global warming to well below 2°C above pre-industrial levels

Explanation

The most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air.

Oxygen (O2) is the second most abundant gas at about 21%.

The inert gas argon (Ar) is the third most abundant gas at 0.93%.