shahkar jalal

Joined October 2025

163 stories

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Is Mass Just Concentrated Energy?
What Do We Mean by Mass? In everyday life, mass feels simple. It’s how heavy something is, how hard it is to push, and how strongly gravity pulls on it. In physics, however, mass plays several deeper roles.
By shahkar jalal3 days ago in Education
Why Do Fundamental Constants Have Their Values?
What Are Fundamental Constants? Fundamental constants are fixed numerical values that define how the universe behaves. They are not measured in the usual sense like length or mass, but instead act as conversion factors between physical quantities or as pure numbers that shape reality.
By shahkar jalal3 days ago in Education
Can Gravity Be Unified with Quantum Mechanics?
Why Unification Matters Every other fundamental force has been successfully described by quantum theory: • Electromagnetism
By shahkar jalal4 days ago in Education
Is Gravity a Force or an Illusion?
Gravity in Everyday Experience In daily life, gravity feels unquestionably real. When you drop an object, it accelerates downward. When you jump, gravity pulls you back to Earth. These experiences suggest a force acting continuously on matter.
By shahkar jalal4 days ago in Education
Why Does Mass Curve Spacetime?
From Newton to Einstein: A New View of Gravity For over 200 years, gravity was described by Newton’s law of universal gravitation.
By shahkar jalal4 days ago in Education
What Is Energy at the Most Fundamental Level?
The Classical Definition of Energy In basic physics, energy is defined as: The capacity to do work or cause change. If something can move an object, heat it, compress it, or transform it, it involves energy.
By shahkar jalal4 days ago in Education
Will the Universe Ever End?
What Does “the End of the Universe” Mean? The end of the universe does not necessarily mean sudden destruction. In science, it usually refers to a state in which:
By shahkar jalal4 days ago in Education
Can the Universe Exist Without Matter?
What Is Matter? Matter is anything that has: • Mass • Volume • Physical structure Atoms, molecules, planets, stars, and living beings are all forms of matter.
By shahkar jalal5 days ago in Education
Are Physical Laws the Same Everywhere in the Universe?
What Are Physical Laws? Physical laws are mathematical descriptions of how nature behaves. They explain relationships between quantities such as:
By shahkar jalal5 days ago in Education
Could the Universe Collapse Again?
What Does It Mean for the Universe to Collapse? A collapsing universe would mean that cosmic expansion stops and reverses.
By shahkar jalal5 days ago in Education
How Old Is the Universe Exactly?
What Does “Age of the Universe” Mean? The age of the universe refers to the time that has passed since the Big Bang — the event when space itself began expanding from an extremely hot and dense state.
By shahkar jalal5 days ago in Education
Are We Living in a Multiverse?
What Is the Multiverse? The multiverse refers to a hypothetical collection of multiple universes, each potentially having different:
By shahkar jalal6 days ago in Education