Pendulum on an Accelerating Train Model
The EJS Pendulum on an Accelerating Train model displays the model of a pendulum on an accelerating train. The problem assumes that the pendulum rod is rigid and massless and of length, L = 2, and the pendulum bob is of mass, m = 1. The initial pendulum angle and the initial velocity of the train can be changed via textboxes, and the acceleration of the train can be changed via a slider.
Symmetry Breaking on a Rotating Hoop
The Rotating Hoop Launcher package shows the dynamics of a mass that is constrained to move on a rotating hoop. The rotating hoop model is an excellent mechanical model of first- and second-order phase transitions. Although the minimum of the potential energy curve corresponds to the bottom of the hoop at low rotation frequency, a spontaneous symmetry breaking (cusp catastrophe) occurs as the frequency is increased. This package presents the theory, a demonstration, and an Easy Java Simulation (
Heritage Hall rededication
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Professor Sir Michael Marmot in conversation with ANU academics
The economic, social and environmental determinants of human development and health equity. Three internationally renowned speakers discuss how environmental, political, economic and cultural characteristics of societies shape conditions in which people live, work and age. Inequities in these factors play a major role in producing health inequities in Australia, across the Asia Pacific region and globally. If set up well, economic development, trade, working conditions, urbanisation and healt
Newton Rocket Car
The purpose of this activity is to demonstrate Newton's third law of motion which states that every action has an equal and opposite reaction through a small wooden car. The Newton cars show how action/reaction works and how the mass of a moving object affects the acceleration and force of the system. Subsequently, the Newton cars provide students with an excellent analogy for how rockets actually work.
Map Your World
Map Your World is part of OLogy, where kids can collect virtual trading cards and create projects with them. Here, they learn about plans by mapping their rooms. The activity begins with a brief explanation of the variety of maps we use, explaining how archaeologists use plans. Kids are then given step-by-step directions for creating a plan that shows their room and its contents. Directions for two additional activities are included, Map a Bigger World and Map Your Room to Scale.
Posterior Fossa Tumor - General Observations Exam - Opening Interview Sub-exam - Patient 9
Patient is a 58-year-old white male with a history of acoustic neuroma that was resected in 1990. He has residual cranial nerve palsies on the right side and experiences tremors, ataxia and disequilibrium. His wife reports that she has noticed an increase in right hand tremor for the past year or so. The tremor worsens as the day progresses and occurs with activity. Patient reports an increase in balance problems while standing over the past 4 months. He has noticed that he staggers a step or t
Inelastic Collision of Particles with Structure Model
The EJS Inelastic Collision of Particles with Structure model displays the inelastic collision between two equal "particles" with structure on a smooth horizontal surface. Each particle has two microscopic elements which interact through a massless spring of stiffness k and natural length L. The mass of one of the microscopic elements and the spring length of the connector spring can be changed via textboxes. You can modify this simulation if you have EJS installed by right-clicking within the p
5.6 An investigation
Do you have a graphics or scientific calculator? If so, this unit will help you to understand the different functions and facilities available. With a focus on arithmetic, you will learn what a powerful tool this type of calculator can be.
Terrorism, Peace, and Other Inconsistencies
This course addresses a set of inter-related questions that have become central to peace and security in the modern era, at both the domestic and international levels. What is the history and rationale for contemporary terrorism, including suicide terrorism? What does the rise of al-Qaeda terror mean for a host of problematic issues including the relationship between the Western and Islamic worlds, the future of peace in the Middle East, the future of various western foreign policy actions? What
Dark leafy seadragon face
This seadragon has a snout and you can see one of its eyes. The tube-shaped snout is what the seadragon uses to eat small bits of food with.
Light and Lenses: Lenses and Optical Instruments
This is the 5th lesson in the series, "Light and Lenses." It describes how microscopes, binoculars, and refracting telescopes magnify objects. (21:01)
9.04.2011 – Langsam gesprochene Nachrichten
Trainieren Sie Ihr Hörverstehen mit authentischen Materialien. Nutzen Sie die Nachrichten der Deutschen Welle von Samstag – als Text und als verständlich gesprochene Audio-Datei.In der ägyptischen Hauptstadt Kairo ist die Militärpolizei mit Gewalt gegen Hunderte Demonstranten auf dem Tahrir-Platz vorgegangen. Mindestens zwei Menschen starben nach Angaben von Ärzten an Schussverletzungen. Die Armee erklärte dagegen, sie habe keine scharfe Munition eingesetzt. Zahlreiche Menschen sollen fe
Geography of the Western Cape of South Africa
A one minute video that shows the major geographical features of South Africa. Too short to provide much insight, but it does who some of the significant land forms.
Slide Right on By Using an Inclined Plane
Students explore building a pyramid, learning about the simple machine called an inclined plane. They also learn about another simple machine, the screw, and how it is used as a lifting or fastening device. During a hands-on activity, students see how the angle of inclination and pull force can make it easier (or harder) to pull an object up an inclined plane.
Baking soda can be used as an indicator of how much acid food contains. You can test grapefruit and orange juice, and you should find that grapefruits and oranges tested with baking soda produce some gas, but less gas when compared to testing lemon and lime juice.
Coupled Oscillators and Normal Modes Model
The EJS Coupled Oscillators and Normal Modes model displays the motion of coupled oscillators, two masses connected by three springs. The initial position of the two masses, the spring constant of the three springs, the damping coefficient for each mass, and the driving force and driving force frequency for the left mass can be changed via text boxes.
Slipping and Rolling Wheel
The EJS Slipping and Rolling Wheel Model shows the motion of a wheel rolling on a floor subject to a frictional force as determined by the coefficient of friction ?k. The simulation allows the user to change the initial translational and rotational velocities of the wheel, v and ?, and the mass, radius, and mass distribution, R, m, and C of the wheel. By controlling these variables, the dynamics of the wheel can be changed to show the sliding, then rolling without slipping, of the wheel.
Spring Pendulum Model
The EJS Spring Pendulum model displays the model of a hollow mass that moves along a rigid rod that is also connected to a spring. The mass, therefore, undergoes a combination of spring and pendulum oscillations. The initial position and velocities, as well as the spring constant can be changed via textboxes.