science essay - Page 3

Temperature

Thermal equilibrium We use the term temperature casually, but what is it exactly? Roughly speaking, temperature is a measure of how concentrated the heat energy…

Defining “Nothing”

One of the trickiest things to define is “nothing.” Why is it difficult to define? Once you try to define “nothing,” it becomes something. Even…

Why It Is Important to Feel Anger

“Saint Anger”: the name of Metallica’s album released in 2003, and a rather controversial expression if used outside the context of heavy music. Indeed, when…

Torque

Force can be interpreted as the rate of transfer of momentum. The equivalent in the case of angular momentum is called torque. Where force tells…

What is Heat?

What is heat? Is it an invisible fluid your bare feet soak up from a hot sidewalk? Can one ever remove all the heat from…

Momentum

A conserved quantity of motion Your first encounter with the conservation of momentum may have come as a small child unjustly confined to a shopping…

Kinetic Energy

The technical term for the energy associated with motion is kinetic energy, from the Greek word for motion (the root is the same as the…

Newton’s Law of Gravity

Kepler’s laws were a beautifully simple explanation of what the planets did, but they did not address why they moved as they did. Did the…

Newton’s Second Law

What about cases where the total force on an object is not zero, so that Newton’s first law does not apply? The object will have…

Newton’s Third Law

Newton created the modern concept of force starting from his insight that all the effects that govern motion are interactions between two objects: unlike the…

Kepler’s Laws

Newton would not have been able to figure out why the planets move the way they do if it had not been for the astronomer…

Newton’s First Law

Newton’s first law: If the total force acting on an object is zero, its center of mass continues in the same state of motion. In…

The Extinction of Species

It is not a secret that the ecological situation on our planet is rather complicated. Apart from the common worries about global warming, industrial pollution,…

Describing Distance and Time in Physics

Center-of-mass motion in one dimension is particularly easy to deal with because all the information about it can be encapsulated in two variables: xx, the…

The Benefits of Geothermal Energy

The debates around renewable sources of energy have been going on at least a decade. After more than a century of relying on fossil fuels…

Types of Motion

If you had to think consciously in order to move your body, you would be severely disabled. Even walking, which we consider to be no…

What Is Physics?

Given for one instant an intelligence which could comprehend all the forces by which nature is animated and the respective positions of the things which…

Ways in Which VR Can Change Our Lives

It is commonplace that technologies are changing the world we live in. Roughly every two decades, Earth becomes almost a brand new place in terms…

The Scientific Method

If you drop your shoe and a coin side by side, they hit the ground at the same time. Why does not the shoe get…

Copying Pictures, Evidencing Evolution

This article [Copying Pictures, Evidencing Evolution] was originally published in The Public Domain Review [http://publicdomainreview.org/2016/05/18/copying-pictures-evidencing-evolution/] under a Creative Commons Attribution-ShareAlike 3.0. If you wish to…

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