Photovoltaics
Photovoltaics is based on the ability of certain materials to convert light directly into electricity. The most common application of solar energy collection outside agriculture are solar water heating systems. Although the basic physical principle has been known for a long time, the technical development of solar cells is far form complete, and further improvements can be expected in the future.
Solar energy could be used for example for power in the oven or heating hot water for a bath. The structure of use is the same.
Picture
Question:
In which direction the solar cells should be aligned best?
1. east
2. west
3. nord
4. south
Vocabulary
solar Energy - Solar Energie
solar cells - Solarzellen
photovoltaics - Photovoltaik
Link: Solar energy
Team Luca Maschek and Diego Di Martino
W7: 3/25 Wednesday * 2020
Special - Distance learning experiment II
Good morning! To the program & tasks >
Team: Luana & Elena, BM2 VZA
Food-Ocki
Food Waste is a big topic in the modern world, and sadly it happens way too often. While we are throwing away food because the expiry date tells us to do so (even thought the food is still edible), other people on this earth are starving because they don't have any food at all.
It's nice to see that a lot of restaurants have already found solutions for this problem. For example; customers get notified about the leftover food through an app and can pick it up for a bargain price.
Although not all restaurants are this sustainable, we think the bigger problem are households, like us. Most of us throw food away which could still be enjoyed by somebody else.
So, our idea is: Every big city should open up a Food-Ocki !
What is that, Food-Ocki?
It is a place where you can go to bring your food which you don't want to eat anymore but is still edible. So leftovers or expired, but not bad, food.
What is the Food-Ocki going to do with this food?
We will firstly check if the food really is still edible. If it is, there are 2 options:
Option 1: We bring it to homeless people.
Option 2: We sell it in our shop, for a very low price.
Why the name "Food-Ocki"?
Ocki comes from Brocki, but since we are selling food, it's Food-Ocki... get it? :)
Results
If 10 people would use this system, there would be less Food Waste and min. 10 more people could eat something.
If 10 people would not use this system, there would be a lot more Food Waste and min. 10 people who could have eaten something, are starving now.
Introduction:
Many people in the world already have a mobile phone. You need a phone to make calls, chat, email and be on social media. Apps are required to perform these tasks. You need gigabytes to download and buy apps. And actually isn’t it tedious (mühsam) to pay more for a phone just to have more gigabytes to download more apps? Wouldn’t it be more interesting and better to have just one app for everything? It seemed very cool for us. That’s why we decided to create a app and would like to bring you closer to the whole thing. More...
Team: Devin Stettler, Luca Napolitano, Jan Tall
A single-family household has to pay a base fee of 20 CHF a month for their energy. For each kWh which they used, they have to pay 0.19 CHF.
More...
Team: Zeynep and Nicole
How many kWh will a television use per year?
Try to find out the solution with the following information: More...
How much energy does a vacuum cleaner need, if it has the following data:
Power consumption: 1600 watts
Usage per day: 30 minutes
This makes 0.8 kWh/day.
How many kWh will it use per year?
by Seraina and Anna
General information
The simple definition for power is P = E / t
E = energy
P = power (watts)
T = time
A 1000 watts is 1 kW. If you use a device that consumes 1 kW for one hour, you have used 1 kWh (kilowatthours). That is the unit an electricity company will bill you with.
If we consider 1 kWh costs CHF 0.20, how much does it cost you to run a 2000 W oven for 45 min?
Written by Kolja and Michael
For our post we choosed a regulare dishwasher. 1000 watt is 1 kwh. The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) of power sustained for one hour
By Silvan and Luana
Team: Nina + Elena
How much kWh does our class (24 students) consume if every student works with her/his laptop during the 3 (hours) T&U lessons? And how much does it cost?
Try to solve the calculation with these numbers:
Device: laptop
Power: 60 kWh
Duration: 72h (24 students x 3h)
Electricity price: 0.22 cents for 1 kWh
Team: Sangeetha & Yllza
power consumption: 1500 watts
usage per day: 10min (for example)
This makes 0.1 kWh/day
How many kWh will it use if you use the hair dryer for 24hours?