NASA KSNN What is gravity?
Gravity is one of the fundamental forces of nature. No one really understands exactly why, but gravity is a force that pulls objects toward each other. The mass of the objects and distance between the objects affects the strength of the force of gravity. Greater masses attract with more force and the force weakens as the objects get further apart.
25 - The "End" of Reconstruction: Disputed Election of 1876, and the "Compromise of 1877"
This lecture focuses on the role of white southern terrorist violence in brining about the end of Reconstruction. Professor Blight begins with an account the Colfax Massacre. Colfax, Louisiana was the sight of the largest mass murder in U.S. history, when a white mob killed dozens of African Americans in the April of 1873. Two Supreme Court decisions would do in the judicial realm what the Colfax Massacre had done in the political. On the same day as the Colfax Massacre, the Supreme Court offere
In some years back the craft upholstery was used to describe the making of carpets, curtains, wall hangings, mattresses and the covering of furniture with fabrics etc. However, with the upsurge of specialization during the industrial revolution, which now dominates the industrial world, the word upholstery is limited to the manufacture and repair of stuffed furniture. The making of curtains and wall hangings has now become a specialized area for interior decorators whilst the production of mattr
Zebrafish embryo development
Early development of Danio eggs note the internal structure and the cluster of eggs (note the large yolk attached to the two-cell egg). The cells all divide at the same time. Within two days this mass of dividing cells will take on the shape of a zebrafish larvae.
ABC's of Nuclear Science and Technology
Introduces the object that contains almost all of the mass in the universe, the atomic nucleus. Antimatter, beta rays, fission and fusion, the structure of the atomic nucleus, how elements on the earth were produced, how we use the nucleus in every day life, and the effects of radiation in the environment are among the topics. The site includes nearly a dozen experiments that can be done in chemistry and physics classes, along with A Teacher's Guide to the Nuclear Science and Technology Wall Cha
Applying Ohm's Law to Semiconductors
This project allows students to apply concepts of momentum conservation and energy conservation from classical physics. However, here they are not enough: they must be combined with modern physics, using concepts from relativity and particle physics as well as modern units that put energy, mass, and momentum in terms of MeV and GeV. Most important, students will learn about both fundamental and cutting-edge physics by actually doing what physicists do.
Students are asked how acceleration, mass, momentum and velocity are involved in mountain boarding.
Attack of the Raging River
In this lesson, the students will discover the relationship between an object's mass and the amount of space it takes up (its volume). The students will also learn about the concepts of displacement and density.
Taking the Boat to Manaus
In this activity, the students will apply the concepts they learned regarding mass, volume and density in the previous activities to design a boat.
Through ten lessons and numerous activities, students explore the natural universal rules engineers and physicists use to understand how things move and stay still. Together, these rules are called "mechanics." The study of mechanics is a way to improve our understanding of everyday movements, such as how gravity pulls things together, how objects balance, spin and twirl, and how things fly and fall. While studying Newton's three laws of motion, students gain hands-on experience with the concept
Mass Balance Model With a Leaky Bucket
In this JAVA based online interactive modeling activity, students are introduced to the concept of mass balance, flow rates, and equilibrium using a simple water bucket model. Students can vary flow rate into the bucket, initial water level in the bucket, and residence time of water in the bucket. After ...
Masses & Springs
A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring.
Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. Set the angle, initial speed, and mass. Add air resistance. Make a game out of this simulation by trying to hit a target.
This animation illustrates Pair Production. In this interaction, the photon's energy creates an electron-positron pair. The minimum photon energy required for this is determined by Einstein's famous Energy-Mass relation.
Halloween Solar Storms from SOHO-EIT and SOHO-LASCO
This movie is a combination of SOHO-EIT at 195 Angstroms as well as the LASCO-C2 and C3 cameras. At this scale we can see the flashes from solar flares in SOHO-EIT (green) and the subsequent coronal mass ejections in SOHO-LASCO-C2 (red) and SOHO-LASCO-C3 (blue). This movie is synchronized to play with ...
Solar Sigmoid: Zoom In, Move Around, Pull Back
Solar sigmoid on the sun indicating possible pending coronal mass ejection.
Nutrition: Isn't it Great!
This project will help you understand how to use nutrition and body mass index information to make healthy food choices.
Launch! Advertising and Promotion in Real Time
Launch! is written for advertising and promotions courses taught to students in the business school and journalism and mass communication students. This book is the first of its kind to teach advertising concepts by reverse engineering a real advertising campaign from beginning to end.
This two-part activity provides an introduction to the basics of measurement (linear, mass, volume, density) and discusses the role of inferential statistics in comparing any two measurements. The concept of random variations in measurements is introduced.
The concept of speed is introduced to the inertia-mass relationship. Concept: Force varies with mass and rate of change of speed. Eureka was a series of short cartoons on physics that ran on public television in the 1980's. The video explains the concept in simple and well illustrated way. Good for students of any elementary school level.