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Archive for the tag “Henry Reich”

Are We Winning Or Losing?

We know that pandemics tend to grow exponentially at first and that growth is difficult to understand. But sooner, rather than later, the disease will run out of new people to infect. That’s why it’s incumbent on the media and government to let us know where we’re headed and if we are making any progress. To put it simply: Are we winning or losing? Host Henry Reich of Minutephysics explains.

Hacking the Periodic Table

A quick glance at the Periodic Table can give you the impression that it’s not very well designed. Why the awkward tall columns and huge gaps in the middle, separating closely related elements? Host Henry Reich shows off his cutting and taping skills to give us some fun, more user-friendly forms in this informative edition of minutephysics.

Free-falling Through Earth

Imagine the Earth were hollow. How long would it take us to fall through the planet? First off, says minutephysics host Henry Reich, assuming the Earth is perfectly spherical and has the same density everywhere, it turns out that the gravitational attraction from any spherical, symmetric object is the same as if all of its mass was concentrated at the center of that object. Phew! That was a mouthful. Tune in as Reich turns to his wheelhouse–math and physics–to give us an answer.

Some Days Aren’t 24 Hours

A stellar day is how long it takes the Earth to complete a full rotation about its axis, measured with respect to a distant stationary reference point in space. But our traditional concept of a day has to do with our Sun, not the galactic center. For each turn of the Earth, there’s a time when the Sun is highest, and a day is simply the time it takes for the Sun to get back to that point. A solar day is not the same thing as a day kept by our clocks, since it uses the Sun as a reference point as to when noon is. But the length of time when the Sun is highest isn’t constant, changing up or down by about a minute over the course of a year. So do we really have 24 hours in a day? minutephysics host Henry Reich unravels the mystery.

Conquering the Impossible Bet

Henry Reich of minutephysics presents a mind-blowing solution to what many gamblers thought was an impossible bet. The presentation is intense and a bit technical, but all you have to do is follow the math.

Walk Or Run in the Rain?

Henry Reich, host of minutephysics, takes on the age-old question: To stay as dry as possible, should you walk or run in the rain? The answer is a bit more complicated than you think.

The Grandfather Paradox

We think a situation creates a paradox, but it really doesn’t. Host Henry Reich of minutephysics says the Grandfather Paradox is a good example. “What if you went back in time and killed your own grandfather?” he says. “Would you still be born? Or would you have thus killed yourself?” Reich explains the solution and tells us what physics, complexity theory and computer science have to say about this famous, murderous, time-travel paradox.

Looking in the Wrong Place

The observable universe is jammed with billions of galaxies, which in turn are packed with trillions of stars and who knows how many planets. So wouldn’t you think the chances of intelligent life, other than ourselves, exists in one of these faraway places? Or are we looking in the wrong place?

Minutephysics host Henry Reich says, “Researchers have predicted that the population of most intelligent alien species should be below 20 million individuals; the majority of planets with intelligent life should have less than 80 percent the radius of the Earth; and the individuals of most intelligent alien species should be at least as massive as polar bears.” Where do we find these species? Reich explains in this edition of minutephysics.

The Air On Other Planets

Have you ever wondered how we know what the air is like on other planets? “We can study the air on other planets, moons and exoplanets by looking at them. In particular, by looking at light that bounces off or passes through their atmospheres,” says host Henry Reich. He fills in the details in this edition of minutephysics.

As the Earth Spins

Physics tells us that the Earth spins eastward at 1,000 mph. So why can’t we fly faster when traveling west? Host Henry Reich says the phenomenon has to do with the Coriolis Effect, which is caused by different parts of the Earth moving east at different speeds. Reich explains why this happens in this edition of minutephysics.

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