本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学
[问答题]
We are not normally awaj: 2uoq ) w-zgcdm,a 9.1sccmrre of the gravitational or electric force betweemv,tkeyhp/: - n two ordinary objects. What is the reason in each case? Give an example where we are aware of eack hvpty,/m: e-h one and why.
参考答案:
For the gravitational
force, we don’t notice it because the force is very weak, due to the very small
value of G, the gravitational constant, and the small value of ordinary
masses. For the electric force, we don’t
notice it because ordinary objects are electrically neutral to a very high
degree. We notice our weight (the force
of gravity) due to the huge mass of the Earth, making a significant gravity
force. We notice the electric force when
objects have a static charge (like static cling from the clothes dryer),
creating a detectable electric force.
本题详细解析:
暂无
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