|
Define pressure - how does it differ from force?
压力是如何与力区分开的？
If the same force is applied to twice the area,
what happens to the pressure?
如果相同的力作用在两倍的面积上，压力会发生什么变化？
If the pressure of the atmosphere is about
15 pounds per square inch, and the top of your
car is about 50 inches by 50 inches, what
total force is exerted on the top of your car
by the atmosphere? Why doesn't it crush the
car top in?
如果大气压约为15磅每平方英寸，而你车顶的面积大约是50英寸乘50英寸，大气对车顶施加的总力是多少？为什么它不会把车顶压碎？
How do you find the pressure at a depth in a fluid?
如何计算流体中某深度处的压强？
If you dive to a depth of 10 meters, how much
additional pressure is exerted upon you?
如果你下潜到10米深的地方，会增加多少额外的压力？
What is Pascal's Principle?
帕斯卡原理是什么？
What is a hydraulic press and what is it
good for? How is Pascal's Principle used
in the hydraulic press?
什么是液压机？它有什么用途？帕斯卡原理在液压机中是如何应用的？
Can a hydraulic press multiply force? Can
it cause something to move further than the
force which is applied to the press? Can it
do both at the same time?
液压机能否放大力？它能否使物体移动的距离超过施加在液压机上的力？它能否同时做到这两点？
What is the Bernoulli Principle?
伯努利原理是什么？
Is there really such a thing as a curveball pitch in
baseball, or is it an optical illusion? How can the
Bernoulli Principle cause a ball to curve?
棒球中真的存在曲球这种东西，还是说只是光学错觉？伯努利原理是如何让球产生曲线运动的？
What is Archimedes' Principle?
阿基米德原理是什么？
What was the basis for Archimedes' conclusion
that the king's crown was not made out of
solid gold?
阿基米德得出王冠并非纯金制成的结论的依据是什么？
How can you make use of the buoyant force on an
object to determine its density?
如何利用作用在物体上的浮力来确定其密度？
If your heart were not pumping enough blood through
an artery to supply your body's needs, what could be
changed to increase the flowrate?
如果心脏泵血量不足以通过动脉满足身体需求，可以采取什么措施来增加血流速率？
If you could increase the blood pressure by 10%, or
increase the radius of the artery by 10%, which
would be more effective in increasing blood flow?
如果你能将血压提高10%，或者将动脉半径增加10%，哪种方法在增加血流方面更有效？
If an artery started to expand because its
wall was too weak to withstand the
internal blood pressure, would that
expansion relieve the stress or tension
of the artery wall?
如果动脉因为壁太弱无法承受内部血压而开始扩张，这种扩张会缓解动脉壁的应力还是张力？
What is the origin of the force which pushes
the mercury up in a barometer?
汞柱在气压计中上升的力的来源是什么？
What force pushes a liquid up a drinking straw?
是什么力将液体推上吸管？
What force moves air into your lungs when
you breathe?
你呼吸时，是什么力将空气送入肺中？
|