What happens to the air pressure as the altitude increases? A. It increases. B. It stays the same. C. It decreases. D. It first increases then decreases. 相关知识点: 试题来源: 解析 C。解析:随着海拔高度增加,气压会降低。因为随着高度升高,上方空气柱的重量减小。A选项气压是降低而非增加,B...
20 What causes the air pressure in the lungs to decrease during breathing in? A A contraction of the external intercostal muscles and diaphragm B expansion of the lungs causing a decrease in the volume of the alveoli C outward movement of the ribs and upward movement of the diaphragm D highe...
It's windy outside. What causes the wind? A. Water evaporates. B. Air pressure differences. C. The earth rotates. D. Clouds move. 相关知识点: 试题来源: 解析 B。解析:风是由于气压差异产生的。选项 A 水蒸发不是风的成因。选项 C 地球自转不是直接导致风的原因。选项 D 云移动不是风的成因...
The difference in the air pressure in your house and the outdoors can be negativeorpositive. Neither is particularly beneficial. Let’s discuss negative air pressure as it relates to your home and specifically to your fireplace. Keep reading to see why this subject is important. WHAT IS IT AN...
百度试题 结果1 题目( ) 24. What kind of pollution may cause high blood pressure? A.Air pollution. B.Noise pollution. C.Light pollution. 相关知识点: 试题来源: 解析 B 反馈 收藏
This difference in speed creates a difference in air pressure, with lower pressure on top and higher pressure on the bottom. This pressure difference results in lift and allows the airplane to fly. Is Bernoulli's Law always true? No, Bernoulli's Law is an idealized principle and there ...
Pressure gradients serve as the key driving force for the bulk flow of fluids in biology (e.g., blood, air, phloem sap). However, students often struggle to understand the mechanism that causes these fluids to flow. To investigate student reasoning about bulk flow, we col-lected students'...
The difference in the applied stress-strain response of the specimens with and without a hole is as follows, (1) The stress-strain curve for the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our...
Air pressure is the weight of the air pushing against a particular area. While we may not think much about air having weight, the gravitational force of the Earth still acts on the atoms of the gases in the atmosphere, pulling them toward the surface of the planet....
What causes pressure injuries?Continuous pressure builds when you sit or lie on an area for too long. Continuous pressure also builds when medical equipment such as oxygen or IV tubing stays in one place too long. Pressure slows or stops the blood from flowing to the skin. This may hurt ...