# All

Title Summary Post date

## Energy Cost of Transport

Keywords: energy, transport

How much energy does it take to move a person or a tonne of freight from A to B?

We compare how much energy it takes to move something from A to B using a variety of means: road, rail, water, air, and if that something is a human, walking and bicycling.

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8 years 45 weeks ago

## Flying

Keywords: aircraft, birds, energy, flight, transport cost

It takes energy to fly. How much?

We examine how much energy it takes to fly from A to B, whether by bird, model glider, small plane or 747.

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8 years 45 weeks ago

## Comparing Energy and Heat Units

Keywords: BTU, cost, energy, greenhouse gases, oil barrel, quad, R-value, thermal conductivity, thermal resistance, unit conversion, Watts

How do I compare heat and energy values given in different units?

A look at how to compare the costs of natural gas, gasoline and electricity and how to convert between various heat units including R-values, U-values, BTU/h, W and more.

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8 years 46 weeks ago

## Thermal Radiation

Keywords: black body radiation, infrared, thermal radiation

All bodies emit radiation. So why don't we all shine in the dark?

Thermal radiation is a crucial part of our macro and micro environments. Although invisible to the eye it can be measured and imaged.

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8 years 49 weeks ago

## Significant Figures

Keywords: calculators, mathematics, physics, significant figures, what numbers mean

This tyrannosaurus is 70,000,003 years old. How many significant figures should I quote?

We examine this perennial student hang-up.

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8 years 50 weeks ago

## Scientific Notation

Keywords: scientific notation

The suspect is a male, age 1.73 × 109 s, height 1.83 m, weight 7.5 × 101 kg.

Understanding how to express numbers in a way that is easily understood.

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8 years 50 weeks ago

## LaTex Expressions - Symbols and Units

Keywords: LaTeX, symbols, units

Wondering what each symbol refers to?

A summary of symbols commonly used throughout the articles and the corresponding LaTeX expressions.

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8 years 50 weeks ago

## Clean Coal

Keywords: energy, Fossil fuel, greenhouse gases, power

An oxymoron?

Calculating how much coal we have to burn in a typical large power station to produce 1 GWe for a year.

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8 years 50 weeks ago

## Solar Energy in a Temperate Climate.

Keywords: photovoltaic cell, solar cells, solar energy, solar radiation

Does it pay to cover your roof with solar panels in Vancouver?

We show the example calculation of expected amount of energy, which can be obtained in Vancouver from a roof covered with solar cells.

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8 years 50 weeks ago

## Hydro-Electric Dam Demo

Keywords: dams, hydro-electricity, power

Energy from Water?

An estimate of the power output from a model hydro-electric dam.

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8 years 50 weeks ago

C21: Physics Teaching for the 21st Century
UBC Department of Physics & Astronomy
6224 Agricultural Road
Vancouver, BC V6T 1Z1
Tel 604.822.3675
Fax 604.822.5324
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