Some version of the Hula-Hoop has been around for millennia, but the popular plastic version was introduced by Wham-O in the 1950s and quickly became a fad. Now, researchers have taken a closer look at the underlying physics of the toy, revealing that certain body types are better at keeping the spinning hoops elevated than others, according to a new paper published in the Proceedings of the National Academy of Sciences.

“We were surprised that an activity as popular, fun, and healthy as hula hooping wasn’t understood even at a basic physics level,” said co-author Leif Ristroph of New York University. “As we made progress on the research, we realized that the math and physics involved are very subtle, and the knowledge gained could be useful in inspiring engineering innovations, harvesting energy from vibrations, and improving in robotic positioners and movers used in industrial processing and manufacturing.”

Ristroph's lab frequently addresses these kinds of colorful real-world puzzles. For instance, in 2018 , Ristroph and colleagues fine-tuned the recipe for the perfect bubble based on experiments with soapy thin films. In 2021 , the Ristroph lab looked into the formation processes underlying so-called "stone forests" common in certain regions of China and Madagascar.

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Some version of the Hula-Hoop has been around for millennia, but the popular plastic version was introduced by Wham-O in the 1950s and quickly became a fad. Now, researchers have taken a closer look at the underlying physics of the toy, revealing that certain body types are better at keeping the spinning hoops elevated than others, according to a new paper published in the Proceedings of the National Academy of Sciences.

“We were surprised that an activity as popular, fun, and healthy as hula hooping wasn’t understood even at a basic physics level,” said co-author Leif Ristroph of New York University. “As we made progress on the research, we realized that the math and physics involved are very subtle, and the knowledge gained could be useful in inspiring engineering innovations, harvesting energy from vibrations, and improving in robotic positioners and movers used in industrial processing and manufacturing.”

Ristroph's lab frequently addresses these kinds of colorful real-world puzzles. For instance, in 2018 , Ristroph and colleagues fine-tuned the recipe for the perfect bubble based on experiments with soapy thin films. In 2021 , the Ristroph lab looked into the formation processes underlying so-called "stone forests" common in certain regions of China and Madagascar.

Read full article

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Some version of the Hula-Hoop has been around for millennia, but the popular plastic version was introduced by Wham-O in the 1950s and quickly became a fad. Now, researchers have taken a closer look at the underlying physics of the toy, revealing that certain body types are better at keeping the spinning hoops elevated than others, according to a new paper published in the Proceedings of the National Academy of Sciences.

“We were surprised that an activity as popular, fun, and healthy as hula hooping wasn’t understood even at a basic physics level,” said co-author Leif Ristroph of New York University. “As we made progress on the research, we realized that the math and physics involved are very subtle, and the knowledge gained could be useful in inspiring engineering innovations, harvesting energy from vibrations, and improving in robotic positioners and movers used in industrial processing and manufacturing.”

Ristroph's lab frequently addresses these kinds of colorful real-world puzzles. For instance, in 2018 , Ristroph and colleagues fine-tuned the recipe for the perfect bubble based on experiments with soapy thin films. In 2021 , the Ristroph lab looked into the formation processes underlying so-called "stone forests" common in certain regions of China and Madagascar.

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When Honda gave the 11th-generation Civic Hatchback a refresh late last year, among the changes were the addition of a hybrid option to the lineup. There was already a lot to like about Honda's compact, which eschews lamentable trends like an over-reliance on touchscreens for good old-fashioned physical controls. Now, a big efficiency boost makes it even more attractive.

The new powertrain is available in the $29,950 Sport Hybrid and the $32,950 Sport Touring Hybrid (the trim we tested). With an output of 200 hp (150 kW) and 232 lb-ft (315 Nm), it's both more powerful and torquier than the 1.5 L turbo previously found in the top trim Civics. And it uses a heck of a lot less fuel in the process.

The Civic uses a hybrid powertrain with two electric motors working with the 2.0 L, four-cylinder engine. One works as a generator to charge the 1 kWh traction battery from the engine under most conditions. The battery then powers the 181 hp (135 kW) traction motor, which is what mostly drives the front wheels, although like most other series hybrids of this nature, it operates as a parallel hybrid with the 141 hp (105 kW) gasoline engine directly driving the front wheels at highway cruising speeds, as that is actually more efficient. (For some reason, this supposed lack of engineering purity seems to really upset some people, who I am sure will let us know why in the comments.)

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When Honda gave the 11th-generation Civic Hatchback a refresh late last year, among the changes were the addition of a hybrid option to the lineup. There was already a lot to like about Honda's compact, which eschews lamentable trends like an over-reliance on touchscreens for good old-fashioned physical controls. Now, a big efficiency boost makes it even more attractive.

The new powertrain is available in the $29,950 Sport Hybrid and the $32,950 Sport Touring Hybrid (the trim we tested). With an output of 200 hp (150 kW) and 232 lb-ft (315 Nm), it's both more powerful and torquier than the 1.5 L turbo previously found in the top trim Civics. And it uses a heck of a lot less fuel in the process.

The Civic uses a hybrid powertrain with two electric motors working with the 2.0 L, four-cylinder engine. One works as a generator to charge the 1 kWh traction battery from the engine under most conditions. The battery then powers the 181 hp (135 kW) traction motor, which is what mostly drives the front wheels, although like most other series hybrids of this nature, it operates as a parallel hybrid with the 141 hp (105 kW) gasoline engine directly driving the front wheels at highway cruising speeds, as that is actually more efficient. (For some reason, this supposed lack of engineering purity seems to really upset some people, who I am sure will let us know why in the comments.)

Read full article

Comments

When Honda gave the 11th-generation Civic Hatchback a refresh late last year, among the changes were the addition of a hybrid option to the lineup. There was already a lot to like about Honda's compact, which eschews lamentable trends like an over-reliance on touchscreens for good old-fashioned physical controls. Now, a big efficiency boost makes it even more attractive.

The new powertrain is available in the $29,950 Sport Hybrid and the $32,950 Sport Touring Hybrid (the trim we tested). With an output of 200 hp (150 kW) and 232 lb-ft (315 Nm), it's both more powerful and torquier than the 1.5 L turbo previously found in the top trim Civics. And it uses a heck of a lot less fuel in the process.

The Civic uses a hybrid powertrain with two electric motors working with the 2.0 L, four-cylinder engine. One works as a generator to charge the 1 kWh traction battery from the engine under most conditions. The battery then powers the 181 hp (135 kW) traction motor, which is what mostly drives the front wheels, although like most other series hybrids of this nature, it operates as a parallel hybrid with the 141 hp (105 kW) gasoline engine directly driving the front wheels at highway cruising speeds, as that is actually more efficient. (For some reason, this supposed lack of engineering purity seems to really upset some people, who I am sure will let us know why in the comments.)

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Although SpaceX founder Elon Musk is known for outspokenness and controversial comments on his social media site X, he has been relatively restrained when it comes to US space policy in recent years.

For example, he has rarely criticized NASA or its overall goal to return humans to the Moon through the Artemis Program. Rather, Musk, who has long preferred Mars as a destination for humans, has more or less been a team player when it comes to the space agency's lunar-focused plans.

This is understandable from a financial perspective, as SpaceX has contracts worth billions of dollars to not only build a Human Landing System as part of NASA's Artemis Program but also to supply food, cargo, and other logistics services to a planned Lunar Gateway in orbit around the Moon.

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Although SpaceX founder Elon Musk is known for outspokenness and controversial comments on his social media site X, he has been relatively restrained when it comes to US space policy in recent years.

For example, he has rarely criticized NASA or its overall goal to return humans to the Moon through the Artemis Program. Rather, Musk, who has long preferred Mars as a destination for humans, has more or less been a team player when it comes to the space agency's lunar-focused plans.

This is understandable from a financial perspective, as SpaceX has contracts worth billions of dollars to not only build a Human Landing System as part of NASA's Artemis Program but also to supply food, cargo, and other logistics services to a planned Lunar Gateway in orbit around the Moon.

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Although SpaceX founder Elon Musk is known for outspokenness and controversial comments on his social media site X, he has been relatively restrained when it comes to US space policy in recent years.

For example, he has rarely criticized NASA or its overall goal to return humans to the Moon through the Artemis Program. Rather, Musk, who has long preferred Mars as a destination for humans, has more or less been a team player when it comes to the space agency's lunar-focused plans.

This is understandable from a financial perspective, as SpaceX has contracts worth billions of dollars to not only build a Human Landing System as part of NASA's Artemis Program but also to supply food, cargo, and other logistics services to a planned Lunar Gateway in orbit around the Moon.

Read full article

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