Here's how to make a model submarine(潜水艇) that dives(潜水) and comes up from underwater like a real one. You'll need●Plastic bottle●Tape(胶)●Thin rubber(橡胶的) or plastic tube(管子)●Waterproof(防水的) modeling clay(黏土)—not real clay,which dissolves(溶解) in water●Small sc...
Diesel-powered ships stay on the surface for a different reason: their engines need a steady supply of oxygen to burn fuel. In theory, it should be much easier for ships to swim under the waves where the water is calmer and puts up less resistance; in practice, that creates a different...
Submarine-launched Tomahawk cruise missile. Photo courtesy U.S. Department of Defense Tomahawk cruise missiles frequently appear in the news because they are the U.S. weapon of choice for a variety of quick-strike operations. With all of the missiles in the U.S. arsenal, have you ever ...
声明: 本网站大部分资源来源于用户创建编辑，上传，机构合作，自有兼职答题团队，如有侵犯了你的权益，请发送邮箱到feedback@deepthink.net.cn 本网站将在三个工作日内移除相关内容,刷刷题对内容所造成的任何后果不承担法律上的任何义务或责任
Does anyone know if you can buy small personal submarines? Maybe there is a kit that I could buy to build my own small submarine. I've heard of submarines that were only the size of a person, and were powered by small motors. Any info would be great. ...
Ships and boats are made to float on top of the water, but there are quite a few things that can go wrong to turn your boat into a submarine. Taking on water is inevitable -- large waves often break over the sides, and tiny leaks are common. This water will usually find its way ...
Using our analogy, suppose each inhabitant on your island has a small submarine. Let's assume that each submarine has these amazing properties: It's fast. It's easy to take with you wherever you go. It's able to completely hide you from any other boats or submarines. It's dependable....
Any object will either float or sink in water depending on its density (how much a certain volume of it weighs). If it's more dense than water, it will usually sink; if it's less dense, it will float. It doesn't matter how big or small the object is: a gold ring will sink ...
Hydrogen ion concentration is heavily influenced by the carbon dioxide concentration and bicarbonate concentration in the blood and CSF. Stretch: Stretch receptors in the lungs and chest wall monitor the amount of stretch in these organs. If the lungs become over-inflated (stretch too much), they...
Now I am a grandmother and music still plays an important part in our family’s everyday life. My youngest grandson loves music very much! He has his own CD player in his room. When we play the one that he likes best, he will jump up and down. ...