Search results for “nombres enters”

How to find radioactive substances in humans

Radioactive substances are found everywhere in our environment. They can enter the human body through inhalation or food. In the video, Dr. Udo Gerstmann explains how to measure radioactivity in the body with a whole-body counter and when it is used. Original: "Federal Office for Radiation Protecti

The natural water cycle

The natural water cycle is powered from solar energy. Its thermal radiation evaporates water from oceans, lakes and rivers into water vapour. As precipitation, the water enters lakes, rivers and groundwater and eventually flows into the sea. Author: 3sat/nano, mirror TV, Christine Voges, R. Engelk

Draw boundaries: Who sets limit values

Radon is a radioactive noble gas. It can enter our homes through cracks – if it accumulates there and we breathe it in for a long time, it can cause cancer. Radon is actually everywhere, but it is distributed differently from region to region. To determine whether you have radon in the house, only m

When did racism start?

Racist thinking is probably as old as mankind. With Columbus and the colonization of Africa and South America over 500 years ago, racism entered the world stage. However, the term "racism" was not coined until the late 19th century. Source: https://www.zdf.de/dokumentation/terra-x/seit-wann-gibt-es

7 Signs You May Be Lonely

There’s a strong difference between being lonely and being alone. When we experience long days at work, go to one big social event after another, or go to school, our bodies will want to enter hermit mode. And that’s normal. Just like batteries, we need time to recharge, and what better way than to

6 Thoughts That Are Making You Depressed

Are your thoughts making you depressed without realizing it? In our social media society, negative self talk has in many ways become the norm, and it’s easy to fall into a pattern of constantly comparing yourself to others or setting unrealistically high expectations for yourself. While these practi