# The Question

On one hand, the kilogram. The SI unit of mass (NOT WEIGHT!). Currently defined as the mass of a certain platinum-iridium cylinder, the kilogram may receive a new definition, or another, soon. For simplicity though, the mass of 1 litre of water is 1 kg. Read the rest of this entry →

## Cold Drinks and Warm Air: Classical Physics Still Holds Its Own

April 29, 2013 in News, Physics Concepts - Higher Secondary, Physics Concepts - Lower Secondary, Science News by dennisseda

# The News

Physicists at the University of Washington have recently proven, without the shadow of a doubt, that a cold drink warms up when the air is warmer. And no, this has nothing to do with the temperature, because that would be too obvious. Instead, the underlying physics has something to do with the latent heat of vapourisation. Read the rest of this entry →

## The Misconception of Mathematics and Women

April 17, 2013 in Links, Random Stuff by dennisseda

A pretty common misconception about mathematics is that women and girls are not that good in it. As a teacher, I know this is not true. Read the rest of this entry →

## Immovable vs. Unstoppable: What’s Gonna Happen?

April 15, 2013 in Physics Concepts - Lower Secondary by dennisseda

# The Question

A few days ago, some students asked what would happen when an unstoppable force meets an immovable object. It was an innocent question, but one that caused the whole class to stop work and ponder on the answer. Since the class was supposed to cover a whole different topic on physics (thermal transfer),  I decided to answer the question, under the condition that we had to finish the topic before going through the physics behind the force and the object.

## The Beauty of Physics: Waves and Light

April 8, 2013 in Random Stuff by dennisseda

When I was taking a break in Bali, I came across a place with a glass tank for a ceiling. The water in the tank was oscillating with the wind, and the sun was in the perfect place its light to shine down from the sky to the floor. It was a marvel by itself, and then I looked at the floor. Read the rest of this entry →

## Approximations of Some Numbers

April 7, 2013 in Links, Random Stuff by dennisseda

## Using ATutor: My Own Online Physics Class

April 7, 2013 in Ideas for Teachers by dennisseda

2008. I was having trouble with keeping up with classes. The reason: every teacher’s chronic request – more time. At that time, I was teaching secondary General Science. So I decided that I need a blog. The blog was about General Science, tailored to what I wanted to cover in order to catch up with lessons. Read the rest of this entry →

## Quantum Mechanics and (Future) Internet Security

April 7, 2013 in News, Science News by dennisseda

# The News

German physicists working on secure data connection have developed an improved method to transmit data securely from one computer to another, using the ideas of quantum mechanics. Read the rest of this entry →

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## Teaching Physics Without Too Much Effort, and Another New Look!

February 20, 2013 in Uncategorized by

I’ve been teaching physics to kids for at least seven years. I know that’s not a long time in absolute terms, but it’s pretty amazing what you can pick up and learn over such a time span. There’s a lot of things that can be done, either to link different areas of study, or to make one point last long. And so, here’s the big pitch: Not only will I be posting stuff related to learning physics (and science in general), but I will also be posting stuff on how to teach physics in a manner that works efficiently.

There’s also gonna be a new look to the site, as I have received feedback that the last one did not have an intuitive feel to it, especially in terms of clicking and reading through articles. Most of that feedback came from my students. I do feel that there is some wisdom in a young one’s requests (like this story about Harry Potter author J.K. Rowling), so I have turned it back into a click-and-read site.

Finally, I now have some time I can use to update the site again. Since the last time, I have had several ideas, which I wanted to either write down or share, but just could not do so. So here’s to a few new things to look forward to. Thanks for sticking around!

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## xkcd What If? Series

February 16, 2013 in Uncategorized by

As I have previously posted, I read the comics posted on www.xkcd.com. The humor, at least for me, is great in that it makes you think. But sometimes, you need something new in life.

A few months ago, that something new came up as a section: the What If? page. It’s as simple as it sounds. What if _________________? Most of the time, site readers submit the questions and one gets answered every week.

Here’s one of my favourites. It’s such a simple question, but with a lot of physics in it. Here you go

If you enjoyed that, just keep reading. There’s a lot to go through, and more coming every week!