Give some examples of the constant movement of molecules in life The more, the better. A little more detail = = | (just a little more detail.)

Give some examples of the constant movement of molecules in life The more, the better. A little more detail = = | (just a little more detail.)

Sound waves are produced by the vibration of air molecules

Give some examples of Doppler effect in life?

The most common is that when the car honks from far to near, the tone you hear is relatively high, and when the car honks from far away, the tone you hear is relatively low
The respondents on the first floor don't even know what Doppler effect is

What is discount in mathematics? Please give an example in life, Best 5, ... the discount of the eleventh edition of mathematics, come quickly!

A discount is a percentage of a number
In reality, the most common thing is shopping in the mall!
For example, a 10% discount on an item is 90% of the original price multiplied by 0.9. The original 100 yuan is only 90 yuan
A 25% discount is 75% times 0.75

Whether the elevator moves up and down in Translation

Yes, translation is parallel movement without mechanical rotation, not just horizontal movement

When you take an elevator, you do translational motion. () judge whether it is right or wrong Hehe, the standard answer is: I can't figure it out for my children,

The movement of the elevator is indeed translational movement, but the concept of translational movement is not touched in the third grade of primary school, so I think the teacher's original intention may be to let the children judge the right or wrong of the horizontal movement of the elevator, and there is no confusion between the concepts of translational movement and horizontal movement, so it is written as translational movement
So I think the teacher must give a reasonable explanation for this problem. If the teacher is wrong, the teacher should admit that if the teacher has his own ideas, he can also say them and discuss them together. Children can't have a wrong concept, which is not very good for children's growth of knowledge
It's also right for the teacher to discuss his own ideas. Indeed, one of the respondents above said better, "take" the elevator. The action of people taking the elevator is actually static, which is relative to the elevator, and the elevator itself is moving. However, it's a little far fetched. The math problems in grade 3 of primary school seem to be a bit literal, And the third grade of primary school did not learn to be relatively static

Is pendulum motion translational?

It is a circular arc reciprocating motion