Worth a Look Archive - Page 2
Exploratorium Magazine Online: Exploring Origami - Oct 1, 2012
Check out Exploratorium Magazine Online: Exploring Origami to learn about recent advances in the art of origami. Don't miss the video of folding interlocking rings out of one sheet of paper. Also, you'll find out how the paper crane became a symbol of peace in Japan.
Mars--NASA Explores the Red Planet: Program Overview - Sep 1, 2012
Click on Mars--NASA Explores the Red Planet: Program Overview to see the first close-up image of Mars, captured by the Mariner spacecraft in 1965, and to learn about NASA's strategy for investigating the red planet. If you click on "Science Overview," and then on "Goal 4," you can find out how NASA plans, over the next decade, to study the challenges of human spaceflight.
Surface Properties of the Moon - Aug 1, 2012
Check out Surface Properties of the Moon for more on the moon's craters and surface material.
Ionizing Radiation and Humans – The Basics - Jul 1, 2012
Radioactivity is all around us--in soil, rocks, and even food--but small doses of it are not harmful. Visit Ionizing Radiation and Humans – The Basics to learn how exposure to radiation is part of our daily lives.
Music Acoustics: How does a guitar work? - Jun 1, 2012
To learn more about the physics of the guitar, including acoustic guitars, visit Music Acoustics: How does a guitar work?.
Torque - May 1, 2012
Visit Torque for photographs that show a horizontal beam fastened to a support at one end, with a weight hung on the beam at different distances from the support. You'll see how the distance of the weight from the support affects how much the beam bends--the further the distance, the greater the torque.
Hyperphysics: X-ray tube - Apr 1, 2012
X-ray tubes work by firing electrons at a metal plate in a vacuum. When an electron passes near the nucleus of one of the atoms in the plate, it is accelerated and emits x-rays, as shown in the drawing on this Hyperphysics page. To learn more, visit Hyperphysics: X-ray tube.
Molecular Chirality - Mar 1, 2012
Both amino acid molecules (the building blocks of proteins) and sugars can be right- or left-handed, and the way they react chemically depends on their handedness. To find out how handedness is important in our diet, and in drugs, visit Molecular Chirality.
Space Topics: Extrasolar Planets--Searching Methods - Feb 1, 2012
There are five ways to detect an extrasolar planet:
How Airplanes Fly: A Physical Description of Lift - Jan 1, 2012
Visit the Florida International University site How Airplanes Fly: A Physical Description of Lift to understand how the wing of an airplane produces lift. You'll see that the frequently-given explanation based on the Bernoulli principle is not correct.