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What is a hand water pump? A hand water pump is simple device that pulls water up from underground. It uses mechanical motion of hands to pull the water from the underground. It has a long handle that you move up and down. When you do this, it uses air pressure and valves to pull … Read more
Balloons moving up in the air always fascinate us as children. But have you wonder why they move up in the air? The underlying principal for balloons upward movement is the same as that of objects floating on water. The balloon moves in the upward direction due to difference in the densities of the … Read more
Explore the human hearing range from low bass to very high frequencies, compare pitch and period, and optionally record observations from short quiet tone bursts. How to use the human hearing range explorer 1 Lower your volume Set your device volume very low before playing a tone. Stop immediately if any sound feels uncomfortable. 2 … Read more
What is a mirage? A mirage is a naturally occurring optical illusion that occurs when light bends due to temperature differences in the air and result in making objects appear to be in different location than they are. Sometimes, it also creates a view of a pool of water or a distorted reflection on the … Read more
Enter any two known parameters such as mass and volume, volume and density or mass and density to find the third unknown parameter Density Calculator Density (g/cm³): Mass (g): Volume (cm³): Calculate
Do you know what do cameras, eye glasses, telescopes and microscopes have in common? The object at the core of these devices is an optical lens. A lens is a transparent object and light is refracted when it passes through the lens. Lens is used in many optical instruments such as cameras, microscope, telescope, optical … Read more
Make your own sound wave by choosing a waveform, changing its frequency and amplitude, adding multiple waves together, observing the shape, optionally listening to the resulting tone, and using your microphone to investigate real sounds. How to make your own sound wave The visualizer opens silently. You can explore every control and waveform before starting … Read more
In our daily life, we hear a lot of different sounds; sound of other people, sound of car, sound of water flowing, sound of different animals etc. Have you ever wonder how sound is generated and how do we hear the sound waves? How Sound Waves are formed? Let’s take a simple example. Throw a … Read more
Binoculars are interesting devices that helps us in viewing distant objects with some level of magnification. It can be used for many things such as sporting events, star gazing, bird watching along with many different natural views. How it works? The below diagram shows the construction of a typical binocular: In order to understand the … Read more
Electricity is one of the most important inventions of our age. Our lives are heavily dependent on electricity. Whether it is lighting, home appliances, powering mobiles and computers, factories, transportation, in fact all sectors in some way rely on electricity. So what is electricity? Firstly it is a form of energy. It is produced when … Read more