Bicycle Head Lamp
Teaching Children About The Four Kinds Of Kinetic Energy
Your child comes home with questions about the different kinds of kinetic energy. So how do you distinguish between the many different types? You can use common examples to help your child understand the kinds of kinetic energy.
Kinetic energy, or the energy of motion, is the ability to do work. If you use a force across a distance, you do work in a scientific sense. If you slide a book across a table, you have used kinetic energy. The many kinds of kinetic energy include mechanical, electrical, radiant, and sound.
Four Kinds of Kinetic Energy #1- Mechanical kinetic energy is the most familiar and common example of kinetic energy. As an object moves, it has kinetic energy. In order to lift an orange over your head it takes a joule of work. Kinetic energy is measured in joules (rhymes with cool) or Newton-meters, with force measured in Newtons and distance measured in meters. A car accelerating at the same rate as a bicycle has more kinetic energy because it has more mass.
Four Kinds of Kinetic Energy #2- Electrical energy that moves through wires is measured in watts. A joule of work done in one second is a watt, which is named for James Watt, the inventor of the steam engine. Trains used to run using steam engines. If you lift a quarter-pound hamburger with cheese vertically, a distance of one meter in one second, you use a watt of power. Take a close look at a light bulb that is not in a lamp. You will see a number followed by "kw", or kilowatts, on most light bulbs. Electric motors also have kilowatt ratings. A kilowatt is one thousand watts. Electrical power can also be described as the product of current, measured in amperes or amps, and potential, measured in volts.
Four Kinds of Kinetic Energy #3- Solar energy is the heat and light, or radiant energy produced by the sun. The sun does not burn like a fire does. Nuclear fusion creates the sun's energy. Helium atoms are formed from lighter hydrogen atoms, in the process creating heat, light, and other particles.
Light energy is a form of radiant energy emitted by accelerating electric charges or the electrons of atoms. Light we see, or visible light, is a small portion of electromagnetic waves, which are partly electric and partly magnetic. Light moves through the vacuum of space or through a material as waves. A wave can be described as a back and forth motion or a vibration.
Light can also move as particles, or photons. Frequency measures how many complete vibrations occur in a given time period, usually a second. Hertz is the unit for frequency, named from Heinrick Hertz who demonstrated radio waves, a type of electromagnetic radiation in 1886. Electromagnetic waves range from the longest, radio waves, to the shortest, gamma rays. The lowest frequency of light that we can see is red and the highest is violet. AM radio waves are broadcast in thousands of hertz, or kilohertz. FM radio waves are broadcast in millions of hertz, or megahertz. Radar and microwave ovens operate in the gigahertz, or billions of hertz range. X-rays and even shorter gamma rays are used in chemotherapy. In a vacuum, all electromagnetic waves travel at the speed of light which is 300,000 km/s.
Heat energy is another form of radiant energy. If you have ever seen a shimmering effect above a paved road or parking lot on a hot day, you have seen heat waves. You can feel heat radiating from a candle flame, a fireplace, or a space heater. Most light bulbs heat up while they operate because the tiny wire inside each bulb, called the filament, heats up and glows.
Four Kinds of Kinetic Energy #4- Acoustic, or sound, energy begins with the vibration of an object. A guitar has strings that vibrate to produce sound. A clarinet has a vibrating reed while a trumpet has a vibrating column of air in the mouthpiece. The human voice has vocal chords. These vibrations start waves in the air. However, sound also needs something to move through, or a medium. There is no sound in outer space since there is nothing for it to travel through. Astronauts outside the space shuttle or the International Space Station use radio waves, a form of electromagnetic radiation, to communicate.
You can use common examples to explain the various kinds of kinetic energy to your child. The many forms of kinetic energy include mechanical, electrical, radiant (heat and light), and sound.
About the Author
I earned my B.S. degree from Penn State in Earth Sciences and my M.S. degree plus teacher's certification from Drexel University. I have 20 years of teaching experience in both public high school and science museum settings.
Is Your Child Struggling With Math or Science Concepts? FREE Demonstration of How My Tutoring Online Classroom With Full Voice Boosts Grades
Police beat
n Joseph Carlton Mayon Jr., 24, 214 Pleasant Run, Leonville, drug court violation. n Randy Antonio Joseph, 30, 1200 Edith St., No. D, Opelousas, drug court violation.
 |
US $.99
| Powered by phpBay Pro |
 | CREE Q5 LED Flashlight Torch - Super Bright! Sale Price: $4.99  |
DescriptionCREE Q5 LED Super Bright Flashlight is made with metal and magnesium alloy material. Thickness, hardness and texture are considered excellent. The 240 lumen CREE LED Q5 head has high brightness, high beam stability and light color close to natural light, which will help to identify the true color of an object... |
 | CREE Q5 LED Flashlight Torch w/ Holster and Bike Holder Super BRIGHT!!!! List Price: |
DescriptionCREE Q5 LED Flashlight w/ Holster Package includes: One Flash Light and Holster. The flashlight is made with metal and magnesium alloy material. Thickness, hardness and texture are considered excellent... |
 | SpareHand Head Shot Flashlight with Head Band List Price: |
DescriptionFour Phased Function hands free 8LED headlamp. Perfect for those job that requires two hands. Also, it comes with adjustable comfort band |
 | Manfrotto 026 Swivel Lite-Tite Umbrella Adapter List Price: |
DescriptionThe Manfrotto 026 Swivel Umbrella Adapter (Lite-Tite) is a versatile aluminum bracket that will fit on almost any light stand. It includes two removable, reversible studs with 1/4"-20 threads, to adapt to light stands with top studs smaller than the standard 5/8"... |
 | Princeton Tec Fred Headlamp, Black List Price: |
DescriptionThe Fred enables users to preserve night vision with the addition of a Red LED.Features ergonimc and lightweight stylingAlways turns on in the low mode of the Red LED, to avoid accidently blinding self or any other peopleFeatures ergonimc and lightweight stylingThree white LEDs are activated by holding the button down for 1... |
 | PL-SLM(F): Solar Bicycle / Headlight with three white LED (Front) |
Description# Super-bright digital IC-controlled white micro-LED |
 | Planet Bike Blinky Safety 1-Led Bicycle Light Set List Price: |
DescriptionNotify drivers and other cyclists of your presence from up to 1 mile away with the Planet Bike Blinky safety set. Equipped with one super-bright white LED for the front and a red LED for the back, the safety set provides 220 degrees of visibility in both flashing and steady modes, depending on your preference... |
 | Planet Bike Beamer 5 LED Bicycle Light with Quick Cam Bracket Mount List Price: |
DescriptionPlanet Bike Beamer 5 Headlights have 5 white LED's with flashing and steady modes, and up to 100hours of run time on 2 AA batteries.LED's 300% brighterUniversal handlebar mount 25.4-32mmBatteries includedItem SpecificationsWeight106gBattery2AABulb5 LEDRun Time100 |
 | Planet Bike Blaze 1-Watt Headlight and Superflash Taillight Combination Bicycle Light Set List Price: |
DescriptionPlanet Bike Headlight & Taillight Sets have a high and low power beam along with "Superflash" flashing mode.Blaze 1 watt LED has hight and low power beam, reinforced alloy midsection, Quickcam bracket mountsSuperflash has 1/2 w LED plus 2 extreme LED's for visibility up to 1 mile, with a unique, eye catching flash patternBatteries includedItem SpecificationsWeight250gBattery2 AAABulb1W LEDRun TimeUp to 100 hours |
 | 6 3/4 Custom Chrome Headlight Head Light for any Harley, Honda, Yamaha, Suzuki, Kawasaki, Custom Bike, Cruiser, Choppers List Price: |
DescriptionFeatures: Enhance the look with this custom chrome headlight This is an after market headlight 100% RUST FREE ! Specification: Condition: Brand new in box Quantity: 1 Lights: Regular bulb - can be replaced Material: High Quality ABS Plastic With Chrome Finish Instructions: not included Mounting Hardware: not included Operation: Daytime... |
Bicycle Headlamp Flashlight
