Browse "Physics"

Article

Aerodynamics

Viscosity is the ability of a flowing liquid or gas to develop internal shear stresses that resist flow. In air, viscous forces are generally small in comparison with inertia forces, a condition which leads to flow instability and turbulence.

Article

Astronomy

Modern astronomy, however, is more concerned with the physical and chemical nature of matter beyond Earth, where conditions of temperature and pressure, and gravitational and magnetic fields allow astronomers to observe matter under extremes unattainable in terrestrial laboratories.

Article

Astrophysics

Astrophysicists use many branches of physics: nuclear physics to study power-generation in stars; atomic physics to understand the spectra of stars and gaseous nebulae; and gas laws and magnetic theory to probe starspots and flares on star surfaces.

Article

Black Hole

Einstein's General Theory of Relativity is used to study black holes, since the older Newtonian theory of gravity does not provide an adequate basis for discussing the curved space-time near them.

Article

Bridge Disasters

​There have been several fatal bridge disasters over the course of Canada’s history, some during construction, others after the bridge was in use for some time.

Article

Challenger Expedition

The Challenger expedition, the first worldwide oceanographic expedition, voyaged 127 663 km in the Atlantic, Southern, Indian and Pacific oceans between December 1872 and May 1876.

Article

Cosmology

How the world began is a question as old as the human race. It was not before the 20th century, however, that the evolution and large-scale structure of the universe emerged as a well-defined problem of interest to science.

Macleans

Exploring Mars

Driver required to operate robotic rover from 190 million kilometres away. Must be able to negotiate vehicle across rock-strewn martian terrain using commands that take 11 minutes to arrive. Experience with computer games an asset.

Article

Galaxy

Serious attempts to estimate the size of the galaxy began in the 19th century.

Article

Gravity

Gravity, the fundamental physical property of attraction between all bodies, is here considered mainly as it relates to the study of the Earth.

Macleans

Life on Mars?

It was an evening in summer upon the placid and temperate planet Mars. Up and down green wine canals, boats as delicate as bronze flowers drifted ....

Article

Lightning

As a thunderstorm grows, or a mature storm approaches, this electric field is reversed. In general, the lower part of a cloud is negatively charged; the upper portions, positively charged. A further positive charge is induced on the Earth's surface below a thunderstorm.

Article

Magnetic Poles

The north and south magnetic poles are the locations on Earth's surface where the planet's magnetic field points straight downwards (at the north magnetic pole) and upwards (at the south magnetic pole). Conventional compasses which move on a horizontal plane are useless near the magnetic poles.

Article

Meteorite Craters

 The solar system contains many objects smaller than the planets (or their satellites) travelling in individual orbits about the SUN; space between the planets also contains myriad dust grains in the micron size range.