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Ask Dr. Universe Computer Sciences
University Communications Network > Ask Dr. Universe > Academic Subjects > Computer Sciences

Dr. Universe: How does electrical power travel through metal? - Gabriel, 4, Illinois

When you watch the zapping bolts during a lightning storm, you know how powerful electricity is. Humans have only been harnessing electricity to bring light and energy to our towns and homes for about 150 years—and metal is one of the main ways we get this powerful tool from place to place. To learn more, I talked to my friend Bob Olsen, a professor emeritus in the Washington State University School of Electrical Engineering and Computer Science. Olsen said it’s important to realize that we don’t need metal wires to move the waves that carry electricity, which are called electromagnetic waves. Some technologies, like cell phones, pick up waves that are sent through the air. Read More ...

Dr. Universe: Why does the internet go down? -Mia, 11, Sheridan, Wyoming

The internet has helped many people connect with classmates, friends and family during the pandemic. But you’re right, sometimes the connection gets lost. My friend Dingwen Tao, an assistant professor of computer science at Washington State University, said we can think about the internet like a highway of information. You may remember from our question about how the internet works that information, like the data that makes up your favorite cat video or science website, travels through electronic signals we cannot see with our eyes. Read More ...

How does the Internet actually work? I know you can type in most anything and it just pops up and all that, but how? - Eden, 8, Oregon

Dear Eden,

If you wrote me a physical letter, it would take a few days to reach me. You put the letter in your mailbox. A postal worker picks it up. Then it travels between different post offices on its journey from you to me.

But within seconds of you sending this question over the Internet, it was sitting in my inbox. How can this be?

The whole Internet works like the mail system—but much faster. That’s what I learned from Adam Hahn, an Assistant Professor of Computer Science at Washington State University.

Read More ...

Dr. Universe: What’s the best story ever made in the world? – Jada, 13, New Jersey

Humans have been telling stories for thousands of years. At first, they told these stories out loud, then they started to write. There are more than a hundred million published books on our planet now and to find out which one is best, I visited my friend Matthew Jockers. He’s a professor at Washington State University who combines his love of stories with computer science to research what makes some books bestsellers. Read More ...

Will electricity ever run out?  -Zoe, WA

Dear Zoe,

Scientists could see and feel electricity in nature long before they discovered how to make it. Maybe you’ve seen it during a powerful electrical storm or felt a little shock from static electricity.

It happens because of tiny parts of atoms. They’re called electrons and they are everywhere.

Read More ...