Inertia of a stationary ball. Fun physical experience at home

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Inertia of a stationary ball. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Take a wooden ball, put it on a piece of cardboard lying on a glass. Knock down the cardboard with a flick of your finger. The cardboard will fall on the table, and the ball will fall into the glass.

Inertia of a stationary ball

Instead of a ball, you can take some other object, such as a checker, a coin.

Author: Rabiza F.V.

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Ambulance notification 20.01.2017

The sirens of ambulances, as well as rescue vehicles, are designed to be loud enough so that even drivers far away can hear them and give way in time. However, some drivers have a habit of playing the music at full volume, and they enjoy the peals of it, blissfully unaware that they interfere with the movement of the ambulance.

In a situation where a person's life depends on the timely arrival of doctors and every second is precious, such behavior can lead to disaster.

Students at the Royal Institute of Technology in Stockholm have developed the technology that will be fitted to ambulances in Sweden. With its help, you can stop the playback of music in cars moving nearby and notify by voice (via an FM tuner with Radio Data System (RDS)) about the approach of an ambulance, so that drivers can “snuggle up” to the side of the road in time, giving way to it. In addition, a text warning about the approach of an ambulance is displayed on the dashboard display in the car.

"Often, drivers have only a few seconds to react and give way to an emergency vehicle," says Mikael Erneberg, one of the creators of the system, dubbed the EVAM System. "The optimal warning time is 10 to 15 seconds."

The student project will be tested on special vehicles in Sweden in the first quarter of 2017.

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