Why did you have to bring African beetles to Australia? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Why did you have to bring African beetles to Australia? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

Why did you have to bring African beetles to Australia?

Cattle have been raised in Australia since the 1880s. By the middle of the 20th century, manure layers in pastures became a big problem, as local dung beetles coevolved with marsupials that produced small and dry feces and could not cope with cow droppings. The problem was solved by introducing dung beetles from another continent - the choice fell on the African Onthophagus gazella. Mindful of the environmental threats from introduced species, the process was approached very carefully, sterilizing the eggs of beetles to get rid of parasites.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What makes the earth revolve around the sun?

Let's start by determining what makes the Earth and other planets move. According to one of the theories about the origin of the solar system, about 5 billion years ago, a huge cloud of dust formed and began to rotate. It turned into a disk, and the hot central mass became the Sun. The outer parts of the dust cloud turned into separate swirling masses, from which the planets then formed.

And now the planets, one of which is the Earth, continue to rotate. And why the Earth and other planets do not fly away into open space? This is prevented by the gravity, or attraction, of the Sun. According to Newton's laws of motion, a moving object tries to continue its movement in a straight line until it is acted upon by extraneous forces. Therefore, moving planets tend to fly away from the Sun in a straight line. But external forces prevent this, keep the planets in their orbits. These external forces are solar gravity, that is, solar attraction.

Each planet moves in its own orbit and the speed of its movement depends on its distance from the Sun. The planet moves faster when it is closer to the Sun and slower when it moves away from it. The Earth moves at a speed of 30,2 km/s when it is closest to the Sun, and at a speed of 29,2 km/s when it is at its furthest from it. As the planet orbits closer to the Sun, the Sun's gravitational pull is stronger; when it moves away, the gravitational pull weakens. Greater gravity causes a greater speed of the planet. For example, Mercury moves at an average speed of 47,9 km/s, and Pluto at an average speed of 4,6 km/s.

Test your knowledge! Did you know...

▪ What does classical mechanics study?

▪ How does oil pollute drinking water?

▪ What chemical element got its name from the poisoning of rodents?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

Random news from the Archive

Smartphone vibration motor for wiretapping 11.06.2016

Researchers from the University of Illinois at Urbana-Champaign (USA) have demonstrated the possibility of wiretapping conversations using a vibration motor that is present in every phone and smartphone and is designed to create vibration for incoming calls and messages, writes TechCrunch.

The vibration motor can be of two types - electromechanical or electromagnetic. Only the second type can be used for wiretapping.

An electromagnetic vibration motor is a coil of wire, inside of which there is a magnetic core. When an alternating electric current is applied to the winding, the core oscillates, creating vibration. Thus, electrical impulses are converted into mechanical motion. Speakers and headphones work the same way.

The microphone has a similar device. It consists, in fact, of the same parts, but in it the mechanical vibrations of the membrane are converted into electrical impulses. This fact allows some speakers to be used as a low quality microphone. Researchers have already tried this practice with a tiny electromagnetic vibration motor in a mobile device.

In their experiment, they used a Samsung Galaxy S3 smartphone with an electromagnetic vibration motor. But in order to successfully conduct the experiment, they needed to replace the control circuit for this motor with another one that they purchased at a regular radio parts store.

Other interesting news:

▪ Antibiotics slow down aging

▪ Bill Gates will create a supercow

▪ Indium antimonide transistor prototype

▪ Contact lenses that project information into the eyes

▪ Desalination of sea water based on nanofiber membrane

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site History of technology, technology, objects around us. Article selection

▪ Article Conscription and its content. Basics of safe life

▪ article Do I need to retrain the left-hander? Detailed answer

▪ article Chokering and skidding of wood by tractors. Standard instruction on labor protection

▪ article LED lamp. Encyclopedia of radio electronics and electrical engineering

▪ article How to read the circuit of your receiver. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews