船的浮力与设计过程

1. Type your name in English. 写下你的英文名字。

What is the correct order of steps in the design process? 设计过程中步骤的正确顺序是什么？

• Test → Build → Evaluate → Plan

• Plan → Evaluate → Build → Test

• Plan → Build → Test → Evaluate

• Build → Evaluate → Test → Plan

Which material would most likely improve the boat’s ability to float? 哪种材料最有可能提高船的浮力？

• Rubber tires 橡胶轮胎

• Concrete blocks 混凝土块

• Plastic bottles 塑料瓶

• Popsicle sticks 冰棒棍

Why might polystyrene foam boards be a good choice for the boat hull? 为什么聚苯乙烯泡沫板可能是船体的好选择？

• They are prone to cracking under pressure 它们容易在压力下开裂

• 1. They are heavy and sink easily 它们很重，容易下沉

• 1. They are difficult to repair if damaged 它们受损后难以修复

• 1. They are lightweight and buoyant 它们轻便且浮力大

What happens if the density of the boat is greater than the density of water? 如果船的密度大于水的密度会发生什么？

• The density of the boat doesn’t affect floating 船的密度不影响浮力

• The boat will sink 船会下沉

• The boat will float 船会浮起

• The boat will move faster 船会移动得更快

What happens if the surface area of the hull is too small? 如果船体的表面积太小会发生什么？

• The boat will be easier to steer 船会更容易操控

• The boat will require less maintenance 船需要的维护更少

• The boat will sink faster 船会下沉得更快

• The boat may capsize 船可能会倾覆

How does the shape of the hull affect the boat's speed? 船体形状如何影响船的速度？

• A deep hull is better for speed 深船体更适合速度

• A narrow hull is always the fastest 窄船体总是最快的

• A streamlined hull reduces drag 流线型船体减少阻力

• A rounded hull increases stability 圆形船体增加稳定性

What is the purpose of a sail on a boat? 船帆的作用是什么？

• To catch wind and propel the boat 捕捉风力推动船只

• 向其他船只发出信号 To signal other boats

• To store food 储存食物

• To make noise 制造噪音

Which factor is most important for a sail's effectiveness in a sailboat? 哪个因素对帆船的帆的效果最重要？

• Brand of the sail 帆的品牌

• Weight of the sail 帆的重量

• Age of the sail 帆的年龄

• Shape of the sail 帆的形状

What is buoyancy? 什么是浮力？

• The depth of water 水的深度

• The temperature of the water 水的温度

• The color of the boat 船的颜色

• The ability to float 浮力