Recent reports discussing the population bomb Indicate that the explosion is slowing A one kiloton nuclear weapon exploded at ground level would destroy about 1 square mile of a city For an atomic bomb the number of doublings required is closest to 80 An implosion type bomb is required for A Pu 239 bomb Moore s Law relates to Computer chip capability Which of the following does not represent exponential growth Illness from anthrax The statement that the Chernobyl accident will kill 24 000 people is based on The linear hypothesis A moderator is something that Slows neutrons The dangerous radioactivity in fallout comes from Fission fragments Fallout is much worse if the bomb Is exploded near the ground A nuclear reactor cannot explode like a nuclear bomb because The nuclear reactor depends on slow neutrons According to the text the least bad place to put nuclear waste is underground A breeder reactor is designed to produce Plutonium The number of nuclear weapons that the United States had was closest to Ten thousand PCR has been used to All of the above The Hiroshima bomb used a gun design If the water moderator is lost from a nuclear reactor Radiation from fission fragments will continue to produce heat The material that might be reprocessed from nuclear waste is Pu 239 Which of the following is not a good example of the doubling law Future population growth The Canadian Candu reactors use Deuterium Plutonium can explode with fewer generations than can uranium because Plutonium fission releases more neutrons In a nuclear power plant the material that runs through the turbine is A steam The number of deaths from the Nagasaki bomb is estimated to be 50 000 150 000 The smallest container that could contain one critical mass of plutonium is Coffee mug The bomb dropped on Hiroshima used as its fuel A uranium Saddam Hussein planned to enrich uranium using Calutrons A centrifuge enrichment plant takes an area of about One large classroom PCR involves A DNA One of the most dangerous radioactive materials from fallout is Sr 90 The China syndrome refers to meltdown of the nuclear fuel Depleted uranium is a useful substance because an artillery shell made from it is very penetrating PCR was used to learn about descendants of Sally Hemmings Another name for the H bomb is Thermonuclear bomb A nuclear explosion similar to the one produced by North Korea would destroy an area of about The size of the Berkeley campus Cold fusion A despite claims has never been observed B has been seen in laboratory experiments C D is the key mechanism used in the tokamak is used by Livermore in the NIF National Ignition Facility project At Three Mile Island some of the uranium fuel melted What distinguishes a breeder reactor from other reactors is that It makes more fuel than it uses Jupiter is not a star because it isn t massive enough Current is measured by Amps A volt is a measure of Energy per electron Magnetism comes from Moving electric charge In a permanent magnet the magnetism comes from the spin of the electrons Magnetic monopoles Have never been found Rail guns push the projectile using Magnetic fields Tesla wanted to use a transformer to distribute electricity because It decreased the current going through long wires to reduce the loss of electricity You can demagnetize a natural magnet by heating it above the Curie point What discovery now allows for headphones to be small and light rare earth magnets such as samarium cobalt Which of the following does not use or consist of permanent magnets Transformers Theoretically the Earth should not have a permanent magnet in its core because its interior is too hot The Earth s magnetism comes from Iron in the crust The Earth flips its magnetism on average approximately twice every million years The north geographic pole of the Earth Is a south magnetic pole Compasses point north because There are electric currents in the iron core of the earth Electricity will heat a wire if it has high current Static electricity occurs when two surfaces rub against each other and Electrons flow from one to another Europe uses higher voltage in homes because it Creates less heat in home wiring Lights and tvs in Europe tend to flicker because Europe uses 50 Hertz the United States uses 60 Hertz When an object loses some electrons it has a positive charge To get a spark you normally need high voltage A fuse is used in a house to prevent House wires from overheating The Earth s magnetic flips are used for geologic dating In a metal electrons can move freely The aspect of electricity that would make it most dangerous is high Current A certain kind of generator uses its own electricity to strengthen its magnetic field Such a generator is called a Dynamo The original superconductors were cooled with liquid helium Room temperature superconductors may exist but haven t been found High temperature superconductors operate at approximately 123 C liquid nitrogen We use AC instead of DC because AC can use transformers Topsy was executed with AC to show the dangers of high voltage Edison wanted a power plant on every city block The current through a flashlight bulb is about one amp A stereo speaker produces sound by the force of a magnetic field on an electric charge The light from an ordinary light bulb comes from the fact that the wire is heated by electricity A Tesla coil is a kind of Transformer Submarines can be detected by their Magnetism At the Curie temperature Magnetism disappears Most electric power is generated by a wire moving through a magnetic field What invention made it possible to change low voltage AC to high voltage AC Transformer To reduce losses from resistance electric power lines use very high voltage An example of a transformer is a Tesla coil Better motors and earphones have recently been made possible by stronger magnets Beats measure the difference between two frequencies Waves tend to bend in to the side with slower wave velocity The fastest earthquake wave is the P wave The slowest earthquake wave is the L wave An octave refers to two frequencies which differ by a factor of 2 When two different waves pass through an opening of the same size which one will spread more larger wavelength The fastest sound wave is they all travel at the same speed You can measure the distance to the epicenter by measuring The time between the P and S waves Sound travels fastest in rock When an opening gets smaller a wave that passes through it spreads more The very center of the
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