What is the difference between average speed and instantaneous speed

First, the definition: the average speed is the distance (route) in unit time; the average speed is the displacement (vector of the first and last position of the particle) in unit time. Second, the speed has only one size, which is a scalar; besides the size, the speed has direction, which is the tangent direction of the trajectory curve at this time

What's the difference between average velocity and instantaneous velocity, that is, what's the difference between velocity and velocity?
What's the difference

In general, distance > displacement. Average speed = displacement / time. Average speed = distance / time. In general, distance > displacement. Average speed = displacement / time. Average speed = distance / time

Difference and relation between average velocity and instantaneous velocity

The average velocity is the ratio of displacement to time. It has direction and size, and the direction is consistent with the displacement direction
The average speed is the ratio of distance to time. It has only size and no direction. The average speed over a period of time is the total distance divided by the total time
The average speed over a period of time is the total bit removed in total time
Instantaneous velocity is the velocity at a certain point in time

Is the instantaneous velocity rate or instantaneous velocity? What is the abbreviation?

Instantaneous velocity is more accurate, instantaneous velocity also has direction (velocity has direction, velocity has no direction)
In terms of instantaneous rate, there is only size but no direction
There is no abbreviation
Velocity and velocity are numerically equal

Speed includes average speed and instantaneous speed, right? And why can instantaneous speed be called speed for short

Right; not instantaneous speed can be referred to as speed, the size of instantaneous speed is referred to as instantaneous speed, and instantaneous rate is also referred to as speed, instantaneous speed and speed are different

The magnitude of instantaneous velocity is called instantaneous velocity. Why?
So why is the average velocity not called the average velocity? Can we say that the average velocity is equal to the average velocity?

The difference is that velocity is a vector, which has both size and direction, while velocity is a scalar, which only reflects the size of velocity without direction
There is a big difference between the average speed and the average speed: the average speed is a scalar and the average speed is a vector, so the average speed and the average speed are not the same physical quantity, but in one-way uniform linear motion, the average speed and the average speed are equal; the average speed emphasizes the size of the average speed and does not emphasize the direction of the average speed. Average speed = distance / time
PS: don't be too mean

The instantaneous velocity is the magnitude of the instantaneous velocity
Is it equal to instantaneous speed? Dumb dumb!

Velocity is a vector, and direction

Does the velocity refer to the instantaneous velocity

Reaction rate constant [1]: for bimolecular reaction a + B - → C + D, let the relative velocity of a and B be V, then in the cylinder with length V and bottom area s (V), the collision frequency of a molecule and B molecule is ZB (V) = s (V) vnb, and the collision frequency of all a molecules in unit volume is Zab = ZB (V) Na, where Na and Nb are the density of a molecule and B molecule respectively, and S (V) is the collision cross section of molecular pair, If s (V) is the effective cross section, that is, the cross section of chemical reaction in each collision, the reaction rate is as follows:
From the chemical kinetics, it can be seen that:
So K (V) = s (V) V, if we average the rate, then we get:
Where K (V) is the rate constant of the given reaction at a given rate of motion, and K (T) is the rate constant of the thermal equilibrium reaction at a given temperature T

What's wrong with instantaneous velocity?
Is it necessary to add the usual two words? When is the special case not tenable?

If you want to be more accurate, I will tell you that we learned speed in junior high school, and then speed appeared in senior high school. In fact, we learned speed in junior high school. The formula of junior high school is s = VT, where s is the distance, and senior high school is the displacement. The main difference is the direction

Is the magnitude of velocity called rate or the magnitude of instantaneous velocity called rate?

The magnitude of speed is called speed
The magnitude of instantaneous velocity is called instantaneous velocity
When it comes to scalar rate (size only)
Velocity is a vector (magnitude and direction)

What is the difference between average speed and instantaneous speed