Physicists have reproduced the chirping effect at the Kukulcan Pyramid

Colombian physicists have reproduced the unusual acoustic effect observed at the Temple of Kukulcan, located on the Yucatan Peninsula in Mexico. The echo of hand clapping at the base of the pyramid resembles the chirping or chirping of a bird. Simulations showed that this effect occurs due to the addition of many waves reflected from… Continue reading Physicists have reproduced the chirping effect at the Kukulcan Pyramid

Spectrometer based on LEGO constructor will make studying physics cheaper

German physics teachers made a universal spectrometer in the Czerny-Turner scheme using LEGO constructors and scrap materials. The authors showed that it can be used to study the spectra of atomic emission, transmission, reflection and fluorescence. Reconfiguring the device for different tasks takes a few minutes, and the total cost of the device does not… Continue reading Spectrometer based on LEGO constructor will make studying physics cheaper

Ice-resistant self-propelled platform “North Pole” went on its first voyage

The research vessel North Pole has set out on its maiden voyage, the Arctic and Antarctic Research Institute said in a statement. It will carry an expedition to the Central Arctic, which will continue the research of the region begun in the 1930s. The 41st Arctic drifting polar station will continue regular research of the… Continue reading Ice-resistant self-propelled platform “North Pole” went on its first voyage

Physicists were able to obtain acoustic frequency combs at 10 gigahertz

American physicists have manufactured a hybrid system from a nonlinear oscillatory circuit and an acoustic resonator connected by a piezoelectric contact. This combination made it possible to impart nonlinearity to acoustic modes at a frequency of 10 gigahertz. The authors were able to generate coherent acoustic frequency combs in their setup, which will help combat… Continue reading Physicists were able to obtain acoustic frequency combs at 10 gigahertz

The ice-resistant self-propelled platform “North Pole” was put into operation

The construction of the ice-resistant self-propelled platform “North Pole” has been completed and the vessel has been put into operation, according to a statement from the Arctic and Antarctic Research Institute received by the editors N+1. The ship will set off on its first voyage on September 1. It will allow scientists to continue regular… Continue reading The ice-resistant self-propelled platform “North Pole” was put into operation

Entomologists have reconstructed the chirping sound of a grasshopper found 150 years ago

Entomologists studied the grasshopper Prophalangopsis obscura, the only specimen of which was collected in northern India 150 years ago. As a result, it was possible to find out the frequency of its chirping. It turned out to be quite low, about 4.7 kilohertz. Such sounds carry far and can give away the location of the… Continue reading Entomologists have reconstructed the chirping sound of a grasshopper found 150 years ago

Lullabies and lisps have proven to be culturally universal

Representatives of 21 different cultural communities around the world communicate acoustically with babies and sing lullabies to them. This was discovered by American scientists who collected and analyzed an audio corpus of 1,615 recordings of singing and conversations addressed to young children and adults. It turned out that communication with babies has its own culturally… Continue reading Lullabies and lisps have proven to be culturally universal

Anti-reflection layer made the cloudy environment transparent

European physicists have figured out how to make a turbid scattering medium completely transparent to waves by installing a specially designed anti-reflection layer in front of it. They demonstrated the performance of the method numerically and experimentally using radio waves. The study was published in Nature. The opacity of objects can be due to various… Continue reading Anti-reflection layer made the cloudy environment transparent

The voices of spectacled penguins in pairs have become similar to each other

In pairs of spectacled penguins, the voices of the partners become similar to each other over time. Ornithologists came to this conclusion after analyzing the vocal characteristics and behavior of these birds from three Italian parks and zoos. At the same time, individuals who simply frequently communicate with each other, but are not in a… Continue reading The voices of spectacled penguins in pairs have become similar to each other

The gravitational constant was measured using bending vibrations of metal beams

Swiss physicists have experimentally implemented a new way to measure the gravitational constant. They measured the amplitude of the bending vibration of a receiver beam suspended adjacent to a transmitter beam. The vibrations of the transmitter created a variable gravitational force, which caused the receiver to vibrate. Despite the large errors, the method has the… Continue reading The gravitational constant was measured using bending vibrations of metal beams