Why is Mars the way it is, even though it's the same age as the Earth, and not too much different in size than the Earth, why has Mars had such a different past in the Earth? And what does that mean for us in the long term health and life of our own planet? We learn ...
How much water does a steam engine use? How much torque does a steam engine have? How much does a steam engine weigh? How many rocket engines were on the Apollo 11? How many reactors did Chernobyl have? How much does the Big Boy steam engine weigh? How many boats in a flotilla?
How much did the Wright brothers' plane weigh? How many voyages did Sir Francis Drake go on? How many siblings did Shirley Chisholm have? How many planes were destroyed in the Battle of Britain? How many Anzacs died at Gallipoli Landing? How many children did Elizabeth of York have? How...
Because much of New Orleans lies below sea level, the city is at risk from flooding. Emergency management officials must begin evacuations (疏散) well before a storm strikes. But evacuation costs money: Businesses close, tourists leave, and citizens take precautionary measures. The mayor of New...
The turbines used in a hydroelectric plant look completely different from a steam turbine because water is so much denser (and slower moving) than steam, but it is the same principle. Wind turbines, also known as wind mills, use the wind as their motive force. A wind turbine looks nothing...
while Gerwig's seems effervescent. Arguments can be made for both combinations. The "Oppenheimer" then "Barbie" camp thinks the latter will be a much-needed pick-me-up, while much of the "Barbie" then "Oppenheimer" camp is attending those early themed screenings. Suggested food and drink ...
Will be much more fun The second time o’takin’. — (c) Matt Begeman Along cam Sir Isaac Newton Doin’ mathematical computin’. One day he contrived To anti-derive When findin’ signed areas is suitin’. There once was a user named Fred, ...
The Sherman compared well to the other tanks in its weight class. It even fared well against vehicles much larger when you take in the whole picture. The US spent a lot of money lavishly equipping these tanks, even the lend-lease tanks shipped with...
The smaller it is, the sooner we go back, and adding an additional pair of solid rocket boosters not only will not increase the payload enough, but require much more extensive development and reduce reliability. It would also greatly increase the difficulty of man-rating the thing. The benne...