US News: This spider accelerates faster than a rocket - PressFrom - United Kingdom
  •   
  •   

US NewsThis spider accelerates faster than a rocket

05:40  14 may  2019
05:40  14 may  2019 Source:   nationalgeographic.com

SpaceX finally delivered space station supplies after a week of delays

SpaceX finally delivered space station supplies after a week of delays Not many things went right for NASA and SpaceX last week. 

Every wonder why oranges, lemons, and limes spray a small mist when you peel them? That’s the question researchers at the University of Central Florida have

A hinged board rotates under the force of gravity and the free end accelerates at a rate faster than g. This board is 1 meter long and starts at an initial

To most, a spider web is a sticky silken net—passive, if exquisitely constructed.

One type of arachnid, however, takes its webs a step further, constructing tension-loaded tools with all the aplomb of medieval engineers. These are triangle weaver spiders in the genus Hyptiotes, found in the United States and many other parts of the world.

After building a triangle-shaped web, they anchor themselves to a twig with silk from their abdomen and pull on a central anchor line, stretching the structure tighter and tighter.

Death toll rises as Gaza militants fire more than 400 rockets into Israel and Israel responds with airstrikes

Death toll rises as Gaza militants fire more than 400 rockets into Israel and Israel responds with airstrikes Israel reports first fatality from Gaza rocket fire since 2014 war

In this Rocket League tips tutorial, I show you the fastest way to boost accelerate with a special trick! This is how to hit supersonic by boosting

Hence, the rocket accelerates faster when it is going horizontally. Somebody could then take that as meaning " faster than upwards as well as downwards". Accelerating upwards, the rocket can accelerate at T-g, where T is thrust, and g is the acceleration due to Earth's gravity.

They're loading their web with potential energy like a crossbow string, but one in which their bodies are the release mechanism that holds the whole system taut until it's time to fire.

When a bug bumps into the web, the spider let go of its anchor line and releases slack from its abdomen, catapulting its web (and itself) forward and capturing the bug in silk.

Israel, Gaza forces agree to cease-fire after deadly weekend

Israel, Gaza forces agree to cease-fire after deadly weekend At least 27 people were killed on both sides of the border in one of the most intense flareups of violence in the region in years.

Не сейчас. Месяц бесплатно. GTA 5 - Driving FASTER THAN A ROCKET ? JANTSUU. Загрузка

Hence, the rocket accelerates faster when it is going horizontally. Somebody could then take that as meaning " faster than upwards as well as downwards". Accelerating upwards, the rocket can accelerate at T-g, where T is thrust, and g is the acceleration due to Earth's gravity.

The effect is “kind of like a net gun,” says Daniel Maksuta, a Ph.D. student at the University of Akron in Ohio and coauthor of a new study on the spider. Sometimes the spider will even “reload” and “fire” the web a few times to ensure its prey is incapacitated, he says.

Now, a new study using high-speed cameras has revealed these webs store and release a staggering amount of energy.

In fact, Hyptiotes cavatus’s web slinging can reach accelerations in excess of 770 meters a second squared, or about 26 times the maximum acceleration of a NASA space shuttle.

The authors argue it is the animal kingdom's only known example of external power amplification—using an outside object to store and multiply energy to be released all at once.

Speedy spiders

This spider accelerates faster than a rocket © Photograph by Stephen Dalton, Nature Picture Library

A triangle web spider in the Hyptiotes genus waits for prey in its freshly made web.

Under heavy rocket fire, Israeli reprisals kill 4

Under heavy rocket fire, Israeli reprisals kill 4 Palestinian militants have fired over 200 rockets into Israel, drawing dozens of retaliatory airstrikes on targets across the Gaza Strip in a round of intense fighting that broke a monthlong lull between the bitter enemies. Four Palestinians, including a pregnant mother and her baby daughter, were killed, while three Israelis, including an 80-year-old woman, were wounded by rocket fire. The fighting came as leaders from Hamas, the militant group that rules Gaza, and the smaller armed faction Islamic Jihad, were in Cairo for talks with Egyptian mediators aimed at preventing a fraying cease-fire from collapsing altogether.

Hence, the rocket accelerates faster when it is going horizontally. Somebody could then take that as meaning " faster than upwards as well as downwards". Accelerating upwards, the rocket can accelerate at T-g, where T is thrust, and g is the acceleration due to Earth's gravity.

Why “ Faster Than 20”? Complex social change typically requires at least 20 years. The cynical explanation is that it requires a generation to We can’t afford to wait this long. The world’s challenges are scaling in complexity faster than our ability to solve them. We need to figure out how to make

For the new study, study leader Sarah Han, a Ph.D. student at University of Akron, Ohio, and colleagues captured wild Hyptiotes cavatus spiders and reared them indoors.

The spiders built their webs just as they would in the wild, and the team recorded how they interacted with prey.

Video footage revealed that each time a spider yanks its web, it’s like turning a crank to wind up a catapult. An arm can only generate so much force with a single contraction, but the elasticity of the web allows it to store the force from many contractions and release it all at once—that’s the power amplification.

The team also created software models of webs and ran simulations comparing a spider using power amplification from its web, jumping using muscle power alone, or using internal energy like a jumping flea.

According to their models, the increased energy provided by the tension-loaded web is what enables the spider to capture its prey.

This strategy is also successful for the spiders: In the lab observations, spiders that didn’t release their webs failed to catch their prey 100 percent of the time, according to the study, published May 13 in Proceedings of the National Academy of Sciences. If the arachnids used their web properly, they had a roughly 70 percent success rate. (Read about other spiders that shoot silk.)

Former manager charged with abuse of Marvel’s Stan Lee

Former manager charged with abuse of Marvel’s Stan Lee A former business manager of Stan Lee has been charged with five counts of elder abuse involving the late Marvel Comics mogul. Los Angeles County prosecutors filed the charges Friday against 43-year-old Keya Morgan, including felony allegations of theft, embezzlement, forgery or fraud against an elder adult, and false imprisonment of an elder adult. © Jordan Strauss/Invision/AP, file Stan Lee, shown in a 2017 file photo. A former business manager of Lee has been charged with five counts of elder abuse of A warrant has been issued for Morgan’s arrest.

Hence, the rocket accelerates faster when it is going horizontally. Somebody could then take that as meaning " faster than upwards as well as downwards". Accelerating upwards, the rocket can accelerate at T-g, where T is thrust, and g is the acceleration due to Earth's gravity.

How does the acceleration of a model rocket compare to the Space Shuttle? By using the resultant force and mass, acceleration For the Space Shuttle, the solid rocket boosters (SRBs) have enough propellant to provide thrust for 124 s. This means that the space shuttle accelerates for more than 2

Unraveling the mysteries of silk

This spider accelerates faster than a rocket © Photograph courtesy S.I. Han

In a laboratory experiment, Hyptiotes cavatus holds its web taut, with its anchor line on the left and trap line on the right.

Other invertebrates produce silk, such as moth larvae, but “it is nowhere near as widespread and functionally diverse as in the spiders,” explains Paul Selden, an paleoarachnologist at the University of Kansas. (Learn how spiders listen to their webs.)

There are nearly as many uses for silk as there are species of spider (more than 45,000), yet even among silk-throwing bolas spiders, sneaky trapdoor spiders, and even electrostatically powered flying baby spiders, Hyptiotes stands out.

“I cannot think of any further evolution of this capture system in spiders, not any comparable capture webs in unrelated species,” Selden says.

Several intriguing questions remain. For instance, when holding their web tight, H. cavatus appear to keep their knees bent, which for most animals would be extremely tiring.

“How can they do it?” Han asks. She plans to find out.

MSN UK are Empowering Happiness for mental health awareness month. Find out more about our campaign and the charities working to stop people falling into crisis here.

Fine Gael TD Bailey is suing top Dublin hotel after she fell off swing.
Fine Gael TD Bailey is suing top Dublin hotel after she fell off swing

—   Share news in the SOC. Networks

Topical videos:

usr: 44
This is interesting!