Tag Archives: physics for high school

Radioactive Decay

Radioactive isotopes of elements have unstable arrangement of neutrons and protons in their nuclei. To become more stable, they emit alpha or beta particles. But this changes the number of protons and neutrons in the nucleus resulting in the formation … Continue reading

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Sources of Nuclear radiation

  Nuclear radiation can damage or destroy living cells or make cells grow abnormally causing cancer. The most dangerous is radiation caused by radioactive materials absorbed by the body. Radioactive gas and dust may be taken into the body along with … Continue reading

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Nuclear Radiation

Discovery: Henry Becquerel discovered radioactivity accidentally in 1896.   Nuclear radiation: Some elements contain atoms with unstable nuclei. With time, the unstable nucleus disintegrates. While doing so, it shoots out a tiny particle and sometimes wave energy as well. Since … Continue reading

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Resistors

  1.  What are resistors? 2.  What is the function of resistors in complicated circuits such as those of TVs and computers? 3.  Name four different types of resistors. 4.  What type of resistor is used to control the brightness … Continue reading

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Resistance

  1.  What is resistance? 2.  The unit of resistance is __________. 3.  What is the symbol for resistance? 4.  Write the equation that is used to measure resistance. 5.  Which are the four factors affecting the resistance of a … Continue reading

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