From a practical standpoint, the advantage of a small nuclear bomb is that it can pack so much explosive force into such a small space. (See How Nuclear Bombs Work for details.) The B61-11 can carry a nuclear charge with anywhere between a 1-kiloton (1,000 tons of TNT) and a 300...
1) Make sure that your Apple Watch is on its charger, is at least 50% charged, and is within a few inches of your paired iPhone. Double-check that Wi-Fi and Bluetooth are enabled on both your phone and watch.2) Open the Watch app on your paired iPhone....
This fluid has a much higher inertia than air -- that is, it is harder to move (think of pushing air versus pushing water). The small force felt at the eardrum is not strong enough to move this fluid. Before the sound passes on to the inner ear, the total pressure (force per unit...
When we're out in space, all you need to do is release a puff of air in a direction to give you a reaction force to push you the other way. That's pretty much what [a reaction control system] is. We have high-pressure air stored in bottles on the ship, and we release a littl...
If you need to solve for CG, take your total moment (unindexed) and divide by the total weight. A common mistake is to add up all of the arms, but this will not provide a helpful number. Instead, you need to calculate it based on the weights and forces in the airplane, which are...
When you first start ramming dirt, it makes a dull sound, but when it's adequately tamped, it will change to a ringing sound. Once the earth is ringing, then you can add the next 4 to 6 inches of soil. It is possible to ram too much, which will cause stress on the wooden form...
It may even tell the brain what to do. Foods with too much salt and sugar affect the microbiome (肠道菌群) in your body by killing the right bacteria (细菌) in it. These bacteria protect you from illness and keep your mind sharp. Lacking them can lead to being overweight and ...
When you think about air traffic control, the image of men and women in the tower of an airport probably comes to mind. However, the air traffic control system is much more complex than that. In this article, we will examine air traffic control in the United States. We'll follow a fli...
, and insert these items above (lit. “to the right”) into a rock which you place in the center courtyard, and subsequently bury them three inches deep [together] with multicolored silk; [these measures] will cause the families of the people’s residences to be auspicious. 凡人家虛耗,...
You can use this number to calculate how much force it takes to push a tire down the road. The CRF has nothing to do with how much traction the tire has; it is used to calculate the amount of drag or rolling resistance caused by the tires. The CRF is just like any other ...