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How much deuterium is on Earth? How much does the planet Mars weigh? If a rock weighs 2 pounds on Mars, how much does the rock weigh on Earth? If you weighed 110 pounds on Earth, how many pounds would you weigh on Jupiter? How heavy is a meteorite? How much does Ceres weigh? How...
When they did this with many stars, they were able to produce combined radio and optical maps of the Milky Way's spiral arms. Each arm is named for the constellations that exist within it. Astronomers think that the motion of the material around the galactic center sets up density waves (...
Next, about 4 inches to 6 inches (10 cm to 15 cm) of soil is shoveled into the form at a time [source: Easton]. Ramming can either be done by hand or by machine. A hand rammer should be about 15 pounds (6.8 kg), and it's usually a piece of steel attached to a pole [sourc...
At 357 feet (108.8 meters) in length, the aforementioned truss is almost as long as an American football field. The ISS also contains multiple sets of broad, rectangular solar panels with 240-foot (73-meter) wingspans. Weight-wise, the station tips the scales at 925,335 pounds (419,725...
Given the thermochemical equation for photosynthesis. 6H_2O(I)+6CO_2(g) --> C_6H12O_6(s)+6O_2(g) delta H=+2803 kJ/mol Calculate the solar energy required to produce 8631 g of C_6H12O_6. When one gram of gas, is burned, 55.5 kJ o...
This also enables you to determine how many kg or pounds of batteries you may need for a particular project. This matters to electric vehicles and anything else that is portable and needs to be lightweight. Lighter = more efficient. When an energy storage medium such as a lead-acid battery...
no single number can describe the temperature of the whole Sun. Its layers are at different temperatures because they're doing very different things. The Sun is a gigantic dynamo powered by hydrogen fusion within its plasma core. At pressures in the trillions of pounds per square inch, the Su...
In many ways, this game of vocabulary was as much a part of the space race as anything else. Nikita Khrushchev, the Soviet premier at the time, knew the power of propaganda better than anyone, so he wanted a name that was both descriptive and inspirational. Some argue that cosmonaut, ...
At 384 pounds (170 kilograms) each — and a total of $850 million to build — you better believe the equipment is not just your trusty MacBook superglued to an AM/FM radio. First of all, a panoramic camera, mounted on each rover, provides a larger geologic context. Located on the ...