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    • What Are Permanent Magnets?

      What Are Permanent Magnets?

      A permanent magnet (ferromagnet) is a material that produces a magnetic field. Permanent magnets are made from ferromagnetic materials, such as iron, and are created when the material is placed inside of a magnetic field. When the magnetic field is removed, the object remains magnetized. Permanent magnets have a permanent magnetic field and do not

    • Mannitol Salt Agar

      Mannitol Salt Agar

      In order to grow a bacterial culture in a lab, a growth medium has to be used to provide the right environment. Mannitol salt agar is a popular bacterial growth medium that biologists use to grow halphile bacteria (these grow fast in high salt concentrations) and can tell the difference between non-pathogenic and pathogenic Staphylococcus

    • How Sand is Formed

      How Sand is Formed

      Sand is a sedimentary material; loose grains of worn out and disintegrated rocks. Sand is of fine granules with grains ranging between 0.06 and 2.0 mm in diameter. Sand is a naturally occurring fragmented material comprised of tiny particles of decomposed rocks, shells, or corals. So how does sand come about? As mentioned before, nature

    • Adhesive Removers

      Adhesive Removers

      An adhesive remover is a chemical that can break the chemical bonds of adhesives. There is a wide variety of adhesive removers because there are many different types of adhesives. Each adhesive on the market has a slightly different formula/chemical structure. Therefore, an adhesive remover must be specifically formulated to break down each adhesive. Adhesive

    • What is Phosphorescence?

      What is Phosphorescence?

      Phosphorescence is an effect in which some chemicals re-emit light that they absorb. It is similar to fluorescence, except that the chemical reactions within phosphorescent materials happen less often, thus they take longer to emit light. Phosphorescent materials can be recharged by being exposed to light and may store light for several hours before it

    • What is a Permeable Membrane?

      What is a Permeable Membrane?

      A membrane is a barrier that prevents entry of materials. Membranes can be permeable, which allows certain materials to go in and out of the barrier based on a variety of factors. Permeable Membrane in Biology In biology, a simple example of a permeable membrane is a cell wall. In both plant and animal cells,

    • Infrared


      Infrared light is a form of electromagnetic waves. In its visible form, infrared can be seen as red or violet. Visible infrared waves are very short, measuring about 750 nm in length; longer infrared waves which are closest to microwaves are about 1mm in length. Infrared Waves While most infrared wave lengths give off heat,

    • Vibration Dampeners

      Vibration Dampeners

      A vibration dampener is any material that is designed to absorb vibration. People come in contact with vibration dampeners on a daily basis. Some examples are carpeting, foam, rubber, and grass. Vibration dampeners are exceptionally useful in situations where heavy machinery is repeatedly colliding with itself or another surface, especially a floor. Vibration dampeners can

    • Pulse Induction Metal Detectors

      Pulse Induction Metal Detectors

      Metal detector technology has been used for a number of decades to locate various metallic artifacts and precious metallic ores. An uncommon, but accurate metal detector is the Pulse Induction Metal Detector. It uses Pulse Induction Technology to find metals. What is Pulse Induction Technology? In Pulse Induction technology, a coil is used as a

    • Total Harmonic Distortion

      Total Harmonic Distortion

      Total Harmonic Distortion (THD) is a measured difference in audio levels between the input audio signal’s harmonics and the harmonics of the output audio signal of an amplifier or other audio device. Output Distortion Level As the signal passes through an amplifier it is always somewhat distorted at its output. The waveform at the input

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