Lots of materials are conductors, meaning electricity can flow through them. However, even power lines, which have the sole job of transporting electricity, aren’t perfect. A little bit of the energy gets lost as the electricity flows. This loss of energy is called resistance. Resistance isn’t a bad thing. We use it for a lot of
Think you could stand still with a bowling ball swinging towards your nose? It’s tough! This scary experiment is governed by the same principle that decides the dynamics of a car crash and guides trick shots on a pool table: a gigantically important physical law called conservation of energy. This law states that if a
To start a fire, you need three ingredients: fuel, oxygen, and heat. Friction is a good source of heat (think striking a match, or rubbing two sticks together). Heat can also come from flowing electricity! Have you ever noticed that electronic devices get warm after they’ve been running for a while? This is the
Rough terrain. Unsurpassable obstacles. Navigating the rocky unknown with little help from home. These are the challenges space robots face as they explore distant worlds and the engineering problems tackled by the teams that design the rovers. Grade school might be a little early for NASA recruiting, but it’s a great time to start playing
Googol is a really really big number. It is a one followed by 100 zeroes. As big as that number is, it seems appropriate for its named counterpart, Google, which celebrates its 17th birthday since its incorporation today! While Google has exploded to the point where it is both a noun and a verb,
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