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Bill Nye takes on Jupiter's deadly radiation. Jupiter produces the radiation equivalent of 100 million X-rays. Nye explains how NASA protects the instruments on the “Juno” spacecraft from this incredibly harsh environment. Part of the “Why With Nye” series.
(Source: DCMP)
Jupiter poses many questions about our solar system. It is a powerful planet of gas whose flowing colors and spots are beautiful, but contain violent storms and jet streams. A mini solar system of over sixty moons rotate around Jupiter--a half billion miles from earth. Could one of these moons contain life under its icy crust?
Radioactivity is all around us and comes from a variety of sources. There are three types of radiation, and experiments show the differences in the penetrating power of each one. A major use of radioactivity is in nuclear medicine. Discusses the half-life of radiation and how to calculate it.
Teaches caveman Zog that people use energy in one of two main ways: by moving heat from one place to another (conduction, convection, or radiation) or by transferring energy from one form to another by using an appliance, like a lamp or car. Appliances always waste some energy, and Zog learns why energy efficient appliances are the best choices people have today. As only a caveman can, Zog provides plenty of laughs along the way to finding clever and complete answers to elementary energy questions.
A black hole is a region of space having a gravitational field so intense that no matter or radiation can escape. In this episode, host Dianna Cowern leads a discussion on black holes and reviews Stephen Hawking's last paper on black holes. Part of the "Physics Girl" series.
Dr. Michelle Thaller explains the relationship between visible light and the principle of black-body radiation. These two aspects along with the anatomy of the human eye explain why stars don't appear green in the night sky. Part of the "Ask an Astronomer" series.
Learn about the discovery Saturn's largest ring. In 2009, astronomers announced the discovery of an enormous, diffuse ring that starts about 6 million kilometers away from Saturn and extends another 12 million kilometers. The ring is so dark that it had escaped observation until the Spitzer Space Telescope detected its infrared radiation.
This video explores the daily condition of the Earth's atmosphere, and the factors that influence and cause weather. Special emphasis is given to the global processes that generate weather patterns. Other topics covered include conduction, convection, radiation, thermometer, barometer, air pressure, winds, anemometer, sea breeze, land breeze, doldrums, trade winds, prevailing westerlies, polar easterlies, and jet streams.
The world's nuclear power plants have generated an estimated 300,000 tons of high-level radioactive waste that must be safely stored for 100,000 years or more. Every year, they generate another 12,000 metric tons of high-level waste. Takes viewers deep into the Onkalo facility as it is being constructed and asks Onkalo representatives, scientists, theologians and others to address fundamental but challenging questions.
The transfer of heat is one of the fundamentals of scientific inquiry. Using numerous examples of how heat transfer is used in everyday life, this program takes students on a journey through the mechanisms and practicalities of heat transfer, clearly explaining the mechanisms of conduction, convection, and radiation and introducing the concept of thermal capacity of an object.
Organics are carbon-based molecules and key ingredients to life. Scientists want to know if organics can be found on Mars. However, finding organics is difficult because they easily break down when exposed to harsh things like extreme radiation and chemical oxidants. These broken down particles give the Martian surface its rusty color. Part of the “Mars in a Minute” series.
Space weather can have important consequences for everyday life, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation. The United States Geological Survey (USGS) Geomagnetism Program monitors variations in the Earth's magnetic field through a network of 14 ground-based observatories around the United States and its territories, providing data in real-time to a variety of customers.
This album of eight computer-animated video segments looks at the particle approach to studying light by exploring the antithesis of the wave model. Presents black-body radiation, Planck's constant, the photoelectric effect, and the work of James Clerk Maxwell as forerunners to Einstein's concept of photon frequency. Shows examples of a slope-intercept graph and a revised double-slit experiment using light-sensitive paper segue to an illustration of the Compton effect, establishing that light consists of a stream of particles. De Broglie's contributions introduce wave-particle duality, which some might consider an inadequate solution, although it represents the best that current science can do.
Human ancestors in Africa likely had dark skin, which is produced by an abundance of the pigment eumelanin in skin cells. In the high ultraviolet (UV) environment of sub-Saharan Africa, darker skin offers protection from the damaging effects of UV radiation. Dr. Jablonski explains that the variation in skin color that evolved since human ancestors migrated out of Africa can be explained by the tradeoff between protection from UV and the need for some UV absorption for the production of vitamin D.
A mutagen is any agent (physical, chemical, or biological) capable of altering the structure of DNA within human cells. This program explores how some mutations are a natural process resulting from errors in the copying and repair of DNA and how some mutagens naturally exist in the world (e.g., UV radiation, cosmic rays, and some radioactive isotopes). Others are specific chemicals that have been synthesized for use in manufacturing or other industries. Mutagens may also arise during the metabolism of certain foods. In many cases mutagens may also lead to the development of cancers.
Provides important steps you can take and become self-reliant to prepare for various emergency situations topics include: Weather-related disasters, hurricanes, tornadoes, blizzards, floods, wildland fires, earthquakes, power outages, terrorism, bio terrorism, pandemics, avian and swine influenza, radiation emergencies, effects of climate change, and other disruptions including civil unrest. Knowing what you and your family can do to prepare for any type of disaster will help reduce stress if a natural or man-made disaster occurs. Having the proper supplies and knowing how to use them can make a difference between life and death in time of an emergency. Explains how to store food and water and you can have hot, tasty meals without electric power.
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