How do helicopters work? What can helicopters do that airplanes cannot? What are some of the special jobs helicopters can do? helicopters feature spinning wings called blades or rotors on top. As a helicopter’s blades spin, they create a force called lift that allows the helicopter to rise into the air. A helicopter’s rotors perform the same function as an airplane’s wings.
“Researchers combined gecko-inspired adhesives and a custom robotic gripper to create a device for grabbing space debris. They tested their gripper in multiple zero gravity settings, including the International Space Station.
Satellites – without these things, our daily lives would look much different. Some of us couldn’t watch television. Some of us couldn’t figure out how to navigate from one place to another when traveling. Some of us could be endangered by bad weather that we didn’t know was coming.
You are probably more familiar with conductors than you realize. If you have ever poured a cup of tea, worn an oven mitt, or taken a sip from a thermos, you already have some firsthand experience with thermal conductors. Heat likes to travel, but only in one direction. Did you know heat travels only from warm or hot things to colder things? This makes sense
Scales are valuable tools that help us keep track of our weight. In addition to doctors’ offices, you’ll also find scales in most homes…probably behind the bathroom door, under the bed, or in the closet!
Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing ( modulating) some property of the radiated waves, such as amplitude, frequency, phase
Visible light (commonly referred to simply as light) is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Visible light has a wavelength in the range of about 380 nanometres to about 740 nm – between the invisible infrared, with longer wavelengths and the invisible ultraviolet, with shorter wavelengths. Primary properties of visible light
textile or cloth is a flexible material consisting of a network of natural or artificial fibres often referred to as thread or yarn. Yarn is produced by spinning raw wool fibres, flax, cotton, or other material on a spinning wheel to produce long strands. Textiles are formed by weaving, knitting, crocheting, knotting, or pressing fibres together ( felt).