More at: scitech.quickfound.net The Challenges of Getting to Mars: Transporting a Mars Rover 11.16.11 A look at getting the Curiosity rover from its birthplace at the Jet Propulsion Laboratory in Pasadena, California, to the launch pad at Kennedy Space Center in Florida. www.jpl.nasa.gov Spacecraft Cruise vehicle dimensions (cruise stage and aeroshell with rover and descent stage inside): Diameter: 14 feet, 9 inches (4.5 meters); height: 9 feet, 8 inches (3 meters) Rover name: Curiosity Rover dimensions: Length: 9 feet, 10 inches (3.0 meters) (not counting arm); width: 9 feet, 1 inch (2.8 meters); height at top of mast: 7 feet (2.1 meters); arm length: 7 feet (2.1 meters); wheel diameter: 20 inches (0.5 meter) Mass: 8463 pounds (3893 kilograms) total at launch, consisting of 1982-pound (899-kilogram) rover; 5293-pound (2401-kilogram) entry, descent and landing system (aeroshell plus fueled descent stage); and 1188-pound (539-kilogram) fueled cruise stage Power for rover: Multi-mission radioisotope thermoelectric generator and lithium-ion batteries Science payload: 165 pounds (75 kilograms) in 10 instruments: Alpha Particle X-ray Spectrometer, Chemistry and Camera, Chemistry and Mineralogy, Dynamic Albedo of Neutrons, Mars Descent Imager, Mars Hand Lens Imager, Mast Camera, Radiation Assessment Detector, Rover Environmental Monitoring Station, and Sample Analysis at Mars Launch Vehicle Type: Atlas V 541 Height with payload: 191 feet (58 meters) Mass, fully fueled, with … Video Rating: 5 / 5
Dr Kiki’s Science Hour 84 (Liquid Fluoride Thorium Reactors) Abridged 3/3 I’ve tried to leave the core points and edit out all the fluff as most people do not have the attention span to make it through the entire hour. The key points are: * We built and ran prototype Liquid Fluoride Thorium Reactors (LFTR) a form of molten salt reactor during the 60′s. We have built LFTRs before. * Alvin Weinberg the man who invented and held the patents for our existing light water reactors (LWR) spent the rest of his career advocating the use of LFTR technology for it’s safety and other advantages over LWR technology. Eventually he was fired for this advocacy even though he invented the LWR. * Once the development of a full scale LFTR design is completed and mass production started we expect a LFTR would be much cheaper to produce than a Light Water Reactor (LWR) we use today. The fuel to run a LFTR would be much more abundant and vastly cheaper than the uranium fuel used in today’s light water reactors. * There is 4 times as much thorium as uranium on the planet, and we have thousands of years worth of thorium fuel available just in the USA. It is a waste product from neodymium rare earth mining. Some mines produce enough thorium as waste to meet the power demands of the entire earth for a year, in just one year of mining for neodymium. * Existing LWRs use less than 1% of the mined uranium as fuel, what can’t be used for fuel is depleted uranium or radioactive waste. In an existing …
Oil Leak Solution with DIY Balloon Angioplasty. Greenpowerscience backyard solution. Better than the “DOME” “TOP HAT” or the famous “JUNK SHOT” now called “TOP KILL” SORT OF HOT TAP THE GULF OIL SPILL. oil spill containment The oil spill Gulf of Mexico 2010 Deepwater Horizon BP 70000 barrel a day loss. Solution for a quick fix. Semi-submersible offshore drilling rig. energycommerce.house.gov Gulf of Mexico response BP’s chief executive Tony Hayward. Video Rating: 4 / 5
Gulf oil spill BOP Flange Hiccup!! Its more than little ears and rough edges BP is trying to cut from the BOP Flange. There is a pretty large steel “tab” they now need to cut off. It should be a minor setback at most and most say that it should actually have been expected by BP. How well BP is able to remove the tab could possibly effect the amount of oil that BP can capture. Inaccurate title or description? Post a comment and I will fix it. Follow live blogging of this event blog.alexanderhiggins.com Watch it live here: blog.alexanderhiggins.com Video Rating: 5 / 5
Seeing isn’t everything and I truly hope that one day mankind will wake up in the morning, at the sunrise of the two stars of Alpha Centauri :) .. but for that we do not need religion and differences of opinion that it generates. “Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.” Carl Sagan Credits go to Philhellenes www.youtube.com Video Rating: 4 / 5
Bill Nye “the Science Guy” explains in simple terms on FOX News how the “Top Kill” method should be able to successfully fix the oil leak in the Gulf Coast. Video Rating: 4 / 5
“It’s absolutely a human rights crime,” says Mac McClelland of the ongoing disaster on the Gulf Coast, where oil from BP’s Deepwater Horizon rig continues to gush into the water despite multiple attempts to plug the leak. Attorney General Eric Holder has announced a criminal investigation into the circumstances surrounding the spill, as BP announced that it was done trying to plug the leak. All the cute code names (“top hat,” “top kill”) in the world haven’t been able to stop the crisis, which in addition to killing 11 workers in the initial explosion, has shut down huge portions of the Gulf to fishing and other industries while devastating the wildlife. McClelland, Mother Jones’s human rights reporter, has been on the ground on the Gulf Coast and sending frequent updates to her Twitter and to the magazine’s website, and she joins us via Skype to give us a view from the ground. Distributed by Tubemogul.
Students solve real world problems at science fair
They may be young, but students involved in a board-wide science fair Monday at O’Gorman Intermediate School have big ideas. Ideas that could one day solve big, global problems.[...] Read more on Timmins Daily Press
Louisiana editorial roundup
Recent editorials from Louisiana newspapers: Read more on Leesville Daily Leader
Government leading the way in Wash. lobbyist spending
The cost for lobbying at the state Capitol in 2011 is at its lowest in several years, but governments’ hired hands are leading the way. Read more on Seattle Times
Govts. leading the way in state lobbyist spending
In a year when the Legislature is looking at cutting programs and new revenue is almost a pipe dream, lobbyists for local governments have been busy at the Capitol. Read more on KOMO Seattle
MSNBC and Keith Olbermann talks with the Michio Kaku on the science of stopping the Gulf oil blowout one mile down. From Countdown with Keith Olbermann.
It’s all relative: You say Einstein is ‘Jewish science,’ I say ‘liberal conspiracy’
BALTIMORE (JTA) — More than a half-century ago, the Nazis dismissed Albert Einstein’s groundbreaking theories as “Jewish science”; in recent years Holocaust revisionists have taken up the anti-Einstein cause. Read more on Cleveland Jewish News
1. Which of the following statements describes the interaction between magnetic poles?
(1 point)
Like poles attract each other.
Like poles repel each other, and opposite poles attract each other.
Opposite poles repel each other.
Like poles attract each other, and opposite poles repel each other.
2. Which of the following statements is true about Earth’s magnetic poles?
(1 point)
They are located at Earth’s geographic poles.
They are the areas where Earth’s magnetic field is weakest.
They are the areas where Earth’s magnetic field is strongest.
Earth has four magnetic poles.
3. Which of the following statements is true about ferromagnetic materials?
(1 point)
All ferromagnetic materials are permanent magnets.
Ferromagnetic materials that are permanent magnets have domains that are randomly oriented.
Ferromagnetic materials that are permanent magnets have domains that remain aligned for long periods of time.
Ferromagnetic materials do not have domains and cannot be magnetized.
4. If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?
(1 point)
counterclockwise in the horizontal plane
clockwise in the horizontal plane
in the same direction as the current
in the opposite direction to the current
5. Which of the following statements is true about a current-carrying wire in a magnetic field?
(1 point)
Reversing the current direction will cause the force deflecting the wire to be parallel to the magnetic field.
Reversing the current direction will cause the force deflecting the wire to be perpendicular to the magnetic field but in the opposite direction.
Reversing the current direction will cause the force deflecting the wire to be parallel to the velocity of the charge.
Reversing the current direction will not affect the force deflecting the wire.
6. How can the voltage in a coil of wire be increased in the process of electromagnetic induction?
(1 point)
Move the magnet inside the coil of wire more slowly.
Hold the magnet stationary.
Move the coil of wire slowly, and keep the magnet stationary.
Move the magnet inside the coil of wire more rapidly.
7. A DC generator is similar to an AC generator except that in
(1 point)
DC generators, slip rings produce direct current.
DC generators, commutators produce direct current.
AC generators, commutators produce alternating current.
AC generators, no commutators or slip rings are used.
8. A transformer has a primary coil with 500 turns and a secondary coil with 250 turns. If the output voltage is 240 volts, what is the input voltage?
(1 point)
96 volts
120 volts
480 volts
500 volts
9. How are fossil fuels used to generate electrical energy?
(1 point)
Heat from burning fuel spins magnets inside an electric motor.
Heat from burning fuel creates steam that spins a turbine.
Heat from burning fuel causes an electric motor to produce a current.
Heat from burning fuel creates steam that turns a transformer.
Completion
Complete each sentence or statement.
10. In a solenoid, there will be no magnetic field if there is no ____________________ in the wires of the coil.
(1 point)
11. The statement that a voltage can be induced in a conductor by a changing magnetic field is known as ____________________ law.
(1 point)
12. Large power plants in the United States currently use _________________________ generators.
(1 point)
Short Answer
13. Explain why Earth’s magnetic North Pole would be a south pole of a bar magnet.
(3 points)
14. How does the charge of a particle affect the direction in which the particle is deflected in a magnetic field?
(3 points)
15. What is a generator and how does it work?
(3 points)
16. List five energy sources that are used in the United States to produce electrical energy.
(3 points)
Essay
17. Explain how a step-up transformer is different from a step-down transformer.
(5 points)
Which of the following statements describes the interaction between magnetic poles?
(1 point)
Like poles attract each other.
Like poles repel each other, and opposite poles attract each other.
Opposite poles repel each other.
Like poles attract each other, and opposite poles repel each other.
2. Which of the following statements is true about Earth’s magnetic poles?
(1 point)
They are located at Earth’s geographic poles.
They are the areas where Earth’s magnetic field is weakest.
They are the areas where Earth’s magnetic field is strongest.
Earth has four magnetic poles.
3. Which of the following statements is true about ferromagnetic materials?
(1 point)
All ferromagnetic materials are permanent magnets.
Ferromagnetic materials that are permanent magnets have domains that are randomly oriented.
Ferromagnetic materials that are permanent magnets have domains that remain aligned for long periods of time.
Ferromagnetic materials do not have domains and cannot be magnetized.
4. If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?
(1 point)
counterclockwise in the horizontal plane
clockwise in the horizontal plane
in the same direction as the current
in the opposite direction to the current
5. Which of the following statements is true about a current-carrying wire in a magnetic field?
(1 point)
Reversing the current direction will cause the force deflecting the wire to be parallel to the magnetic field.
Reversing the current direction will cause the force deflecting the wire to be perpendicular to the magnetic field but in the opposite direction.
Reversing the current direction will cause the force deflecting the wire to be parallel to the velocity of the charge.
Reversing the current direction will not affect the force deflecting the wire.
6. How can the voltage in a coil of wire be increased in the process of electromagnetic induction?
(1 point)
Move the magnet inside the coil of wire more slowly.
Hold the magnet stationary.
Move the coil of wire slowly, and keep the magnet stationary.
Move the magnet inside the coil of wire more rapidly.
7. A DC generator is similar to an AC generator except that in
(1 point)
DC generators, slip rings produce direct current.
DC generators, commutators produce direct current.
AC generators, commutators produce alternating current.
AC generators, no commutators or slip rings are used.
8. A transformer has a primary coil with 500 turns and a secondary coil with 250 turns. If the output voltage is 240 volts, what is the input voltage?
(1 point)
96 volts
120 volts
480 volts
500 volts
9. How are fossil fuels used to generate electrical energy?
(1 point)
Heat from burning fuel spins magnets inside an electric motor.
Heat from burning fuel creates steam that spins a turbine.
Heat from burning fuel causes an electric motor to produce a current.
Heat from burning fuel creates steam that turns a transformer.
Completion
Complete each sentence or statement.
10. In a solenoid, there will be no magnetic field if there is no ____________________ in the wires of the coil.
(1 point)
11. The statement that a voltage can be induced in a conductor by a changing magnetic field is known as ____________________ law.
(1 point)
12. Large power plants in the United States currently use _________________________ generators.
(1 point)
I’m aware of Hydrogen 7 technology, pioneered by BMW. However, I heard that hydrogen as an alternative fuel is one of the most in-efficient. I’m also aware of working electric engines that go back as far as Tesla’s designs, and Tesla Motors whose recenlty created a fully electric 220 hp beast. The Tesla Roadster. I want to get into the “meat” of the science behind alternative fuels and since the technology apparently is public knowledge why aren’t we as a society mass producing these marvels. What is the government hiding? Besides it’s oil addiction. We as a species know our immediate threat to extinction can be erradicated if we take immediate action. So what’s the problem? I recommend renting “An Inconvenient Truth” for all those that haven’t seen it. Please back up opinions or theory by citing reliable references before entering it into this blog. We want to keep this blog as reliable as possible.
4. A machine that converts electrical energy to mechanical energy is called a/an ______________. (1 point)
generator <------
solar panel
windmill
motor
1. Generators convert physical energy into __________. (1 point)
sound waves
electrical energy
batteries
motors
2. Thermal power plants heat ______ to create steam. (1 point)
wood
water
plants
fossil fuels
3. Nuclear fission ________ atoms to create heat energy. (1 point)
heats
corrodes
splits
combines
4. A machine that converts electrical energy to mechanical energy is called a/an ______________. (1 point)
generator
solar panel
windmill
motor
5. Nuclear power plants use the radioactive element ________ to create energy. (1 point)
californium
plutonium
kryptonite
uranium-235
6. Green power comes from ___________. (1 point)
wind
sun
water
all of the above
7. Geothermal energy comes from _______ deep in the earth. (1 point)
magma
lava
solar power
volcanoes
8. Landfills emit ________ gas. (1 point)
petroleum
methane
oxygen
butane
9. ______ power can be harnessed in the ocean to create power. (1 point)
Chemical
Wave
Nuclear
Solar
10. Which state would best be suited to harness wind energy? (1 point)
California
Florida
North Dakota
South Dakota
1. Generators convert physical energy into __________.
sound waves
electrical energy
batteries
motors
2. Thermal power plants heat ______ to create steam.
wood
water
plants
fossil fuels
3. Nuclear fission ________ atoms to create heat energy.
heats
corrodes
splits
combines
4. A machine that converts electrical energy to mechanical energy is called a/an ______________.
generator
solar panel
windmill
motor
5. Nuclear power plants use the radioactive element ________ to create energy.
californium
plutonium
kryptonite
uranium-235
6. Green power comes from ___________.
wind
sun
water
all of the above
7. Geothermal energy comes from _______ deep in the earth.
magma
lava
solar power
volcanoes
8. Landfills emit ________ gas.
petroleum
methane
oxygen
butane
9. ______ power can be harnessed in the ocean to create power.
Chemical
Wave
Nuclear
Solar
10. Which state would best be suited to harness wind energy?
California
Florida
North Dakota
South Dakota
I wanted to make a small wind mill project that can generate a small ammount of electricity. well the project is about conserving electricity,and one of the topic is model of a wind mill that produces electricity so can you please help me out in this one
Nuclear energy is produced from either uranium or plutonium through a process called fission. Find out how nuclear reactors are used to slow down neutrons withinformation from a science teacher in this free video on nuclear energy and science lessons. Expert: Steve Jones Contact: www.marlixint.com Bio: Steve Jones is an experienced mathematics and science teacher. Filmmaker: Paul Volniansky
