... submersibles Auguste Piccard and his son Jacques Piccard invented Trieste. What epoch-making of it was that Trieste took advantage of the gasoline that is lighter than water for its buoyancy. About two-thirds of the weight was filled with it. So, when Trieste went deeper it was used to speed up to descend by throwing away some gasoline. After 8 years that was built ... some samples, or set up observational apparatus. The reason Shinkai 6500 can tolerate such an ultrahigh pressure and low temperature under 6,500 meters is the usage of titanium for its body material. Titanium is really li...

• Word Count: 2371
• Approx Pages: 9
• Grade Level: High School

... how to be risked on a combat mission Why Doolittle? Flying fame only 2nd the Lindberg, set aviation speed records, had performed the 1st outside loop, scored a first in blind flying', earned a doctorate of aeronautical science from MIT, in general if it had wings and looked like a plane - chances were ... and air cover Doolittle allowed each crew to pick its own targets, Imperial Palace ruled out b/c would only inflame Japan's fighting spirit Most of these fliers had not experienced combat b4 The Japanese knew they were coming b/c had picked up radio messages transmitted btwn the 2 task ...

• Word Count: 2175
• Approx Pages: 9
• Grade Level: Undergraduate

... could see smoke and fires creeping up the sides of the mountain." The atomic bomb wiped out 4.1 square miles of Hiroshima. That is about sixty percent of the city. The atomic bomb crashed with the explosive power of 20,000 tons of TNT. The explosion from the bomb was indescribably loud. There was a tremendous fireball of white light. This fireball was a hundred times brighter than the sun ... and was 250 feet in diameter. The fireball sucked up millions of tons of dust and debris and formed a mushroom cloud that rained radioactive material on the ... the bomber. After the bomb was drop...

• Word Count: 1619
• Approx Pages: 6
• Grade Level: High School

... . Thus, at 5:29:45, the "gadget" exploded with a force equivalent to 21,000 of TNT. Only the words of General Thomas Farrel, present at the site, could fully explain the magnitude of the situation; he wrote: [The] whole country was lighted by a searing light with the intensity many times that of the midday sun. It was golden, purple, violet, [grey] and blue. It lighted every ... peak, crevasse and ridge of the nearby mountain range with a clarity and beauty that cannot be described but must ... and made us feel we puny things were blasphemous to dare tamper with the forces heretofore re...

• Word Count: 2170
• Approx Pages: 9
• Has Bibliography
• Grade Level: High School