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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/hs-physics/x215e29cb31244fa1:electromagnetic-radiation/x215e29cb31244fa1:wave-particle-duality/v/introduction-to-light
Light and the electromagnetic radiation spectrum. Wave and particle-like behavior, and how to calculate the wavelength or frequency of a light wave. Created by Sal Khan.
Watch the next lesson:…
Learn about iron deficiency anemia with anemia symptoms or signs and anemia treatment in this video!
WHAT IS IRON DEFICIENCY ANEMIA:
Iron deficiency anaemia is caused by lack of iron, often because of blood loss or pregnancy. It's treated with iron tablets prescribed by a GP and by eating iron-rich foods.
Check if you have iron deficiency anaemia,
Symptoms can include:
• Tiredness and lack of energy
• Shortness of breath
• Noticeable heartbeats (heart palpitations)
• Pale skin
Less common…
Northrop Grumman is proud to lead the industry team building NASA's James Webb Space Telescope. This revolutionary observatory is the largest telescope built for space and the most powerful infrared telescope ever made. It is the scientific successor to the Hubble Space Telescope. The Webb telescope will travel 1 million miles from earth and look back over 13.5 billion years, providing images of the first galaxies formed and observing unexplored planets around distant stars. The breakthrough…
Ben thought he wanted to be an engineer and took some science courses at college but decided that book learning wasn't for him. He fell in love with hands on work so he switched to Tool and Die and eventually became a machinist. Ben's favourite part of his job is when he comes into work with a big challenge in front of him where you don't even know where to start. He loves finding a way to solve any problem. Nothing is impossible, says Ben in his Job Talk.
Job Talks is a research initiative…
John Warner, one of the founders of green chemistry and Chief Technology Officer of Warner Babcock Institute for Green Chemistry explains why green chemistry is the answer to teaching, doing, inventing and managing chemistry
This is the prototype RGB LED Time Fountain I designed and built. It uses RGB LED strip lights to strobe a stream of water drops to make them appear as if they are levitating. By strobing the different colours out of phase with each other some incredible effects can be created.
An Arduino Uno controls the timing of the RGB strobe and the PWM of the pump. Bluetooth communication was achieved using an HC-05 Bluetooth module and the "Arduino bluetooth controller" app by "Giumig Apps".
The code…
This video is the second in a two-part series on our Light-Tracking Bristlebot project. After you build the robot in part one, this video will show you how to use the robot and go over common troubleshooting issues you may encounter when working with groups of students. Kit available here: https://www.homesciencetools.com/product/advanced-bristlebot-kit/?aff=SB1
To view written directions for this project, see the "Build a Light-Tracking Bristlebot" page at Science Buddies:…
This video is an introduction to the line-tracking version of the Science Buddies BlueBot kit. The robot uses two infrared light sensors to automatically follow a black line on a white background. Robot kit available: https://www.homesciencetools.com/product/bluebot-4-in-1-educational-robotics-kit/?aff=SB1
To view full directions for this science project, see the "Line-Tracking Robot: BlueBot Project #2" Project Idea at Science Buddies:…
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