[5] The rising and sinking of the submarine depend on the principle of Archimedes. The upward push of the water is just equal to the weight of the water displaced. If the water displaced weighs more than the boat, then the upward push of the water is greater than the weight of the boat and the boat rises. However, the boat can be made to dive when its weight is just a little less than the weight of the water displaced. This is done by means of horizontal rudders which may be inclined so as to cause the boat to glide downward as its propeller drives it forward. 5 Select the correct answer. How do the details in the 5th paragraph develop the claim in the text? A. They explain how a submarine performs in war. B. They explain how a submarine navigates underwater. C. They explain why the submarine is often used in warfare. D. They explain why an airship is difficult for a submarine to attack. Reset Next