Current Event

Urban Heat May Warm Faraway Places

Author of the article: Daniel Stone

Date published: 28th of January 2013

Source National Geographic

URL: http://news.nationalgeographic.com/news/2013/130128-climate-cities-urban-heat-island-atmosphere-science/

Every day tasks in a city produce very much energy, which is transformed into heat. This heat cruises around the air in the city and flows into the jetstream, so it spreads around the planet heating up villages. Big metropolises in America use up 42% of the annual global consumption. This means that humans are responsible for global warming. 

I enjoyed reading this article because it talks about a huge issue. Humans should find a way to stop energy from transforming into heat. Soon, I will not be able to ski, for snow will be very scearse. I hope that a majority of people will except the new life with machines that do not transform energy into heat.

Reflection on the Wave Experiment

________________________________________

In the this experiment, my partner was Nikola. We used a plastic tray, two pipettes, a paper towel, modeling clay, cork and water. First, we dropped water in the center of the tray using pipettes and it produced circular waves that pushed the cork outwards. When there was one drop in the corner, it pushed the cork towards the opposite corner. When there was one drop at the end, it pushed the cork towards the other end. When there were two drops were close together in the center, they made a bigger wave. When there were two drops in the corner, again the wave was bigger and pushed the cork towards the other corner. When there were two drops at the end, the wave was bigger and pushed the cork towards the other end. If two waves going in opposite directions met, they went under/over the other wave. If a wave hit a barrier it bounced off and lost some energy. If a wave hit the side of the pan it bounced off. If a wave got to the paper towel, it would go under it. A wave would always go through the gap in between the barriers. The larger the frequency the more waves, the wave source produces in a second. The larger the amplitude the more energy the waves carries.