Is there a big connection between [vector of high school mathematics] and [calculus]? rt? In addition, vectors are not related to the equations of straight lines and circles, are they?

Is there a big connection between [vector of high school mathematics] and [calculus]? rt? In addition, vectors are not related to the equations of straight lines and circles, are they?

Vectors have little to do with calculus
Calculus is mainly related to derivative and limit of high school students
I am a freshman
I did a preview of calculus
The relation between vector and equation of linear circle
I don't know if it's the title or the internal relationship
High school mathematics problems a lot of linear and circular equations and vectors linked together
In itself, vectors can also be applied to the equations of lines and circles

How is the short circuit phenomenon represented in the circuit diagram,

In the circuit, the current does not flow through the consumer, directly connected to the two poles of the power supply, the power supply short circuit

How to calculate line loss in high voltage transmission line

Analysis and theoretical calculation of line loss
1. Concept and theoretical calculation of line loss
When the load current through the line, the line resistance will produce power loss
1) Calculation of active power loss of single line
△P=I：R
Where: △ P -- power loss, W;
I -- load current, a;
K -- conductor resistance, Q
2) Three phase power line
The line active power loss is:
Δ P = a p ^ + △ Pb + △ PC = 31 phthalein
3) Calculation of line resistance
Considering the main influence factors of line loss are
The reference materials are from the official website 027-83313329

The 12.56 meter long rope can just circle the trunk of a tree for 10 times. What is the diameter of the cross section of the trunk of the tree?
If you want to answer, please write clearly: this /

/It's a division sign
12.56/10=1.256
1.256/3.14=0.4
Just root 0.4

On the sign of specific heat capacity
Many physical symbols have their origins
Why is the specific heat capacity expressed by C?
thank you

Specific heat [capacity]
Because there is a specific heat ratio: specific heat [ratio], in order not to be confused, it is distinguished by the first letter of the last word, so it is C

Two objects with mass M1 and M2 move in a straight line at the speed of V1 and V2 respectively, and at the speed of V1 and V2 respectively,
And v1

According to Newton's second law, f = am
The larger m is, the smaller A is
1. When f is in the same direction as V1 and V2, the acceleration in the positive direction is provided (that is, the speed of the last two objects when the speed is equal is greater than the current speed). Because v1a2, M1

How many Mu is a field equal to?

Cuan, in fact, is a common name, nominal hectare; large Mu is city mu, small Mu is public mu
1 ha = 100 mu = 15 mu

A hollow metal ball with a density of 2.5 × 103 / m3 is made of metal. It is weighed 14.7n in air with a spring dynamometer and 4.9n in water
1. It is proved that the ball is hollow by calculation
2. Calculate the volume of the hollow part of the ball

∵ weigh 14.7n in air with a spring dynamometer, i.e. g ball = m ball, g = 14.7n,
Ψ m ball = 14.7n △ 9.8n/kg = 1.5kg,
Ψ V solid = m sphere △ ρ metal = 1.5kg △ 2500kg / m3 = 0.0006 m3 (useful later)
9 n in water
9 n = 9. 8 N, that is, ρ water GV ball = 9. 8 n. substituting the data, we can get V ball = 0. 001 cubic meter
It can be seen that if V ball > V solid, the ball is hollow, and V hollow = V ball - V solid = 0.001 cubic meters - 0.0006 cubic meters = 0.0004 cubic meters
A brief answer
Tip: the average density of metal ball can also be calculated by v-ball: ρ average = m-ball △ v-ball = 1500kg / m3 ＜ ρ metal to prove that the ball is hollow. Both methods can be used, but in this problem, both v-ball and v-solid can be obtained, so the conclusion of hollow can be obtained by directly comparing them

Given the base length of a right triangle is 12 and the hypotenuse length is 15, what is the formula for finding the side length of another right triangle

The sum of the squares of the two right angled sides is equal to the square of the hypotenuse, that is, A2 + B2 = C2

Two pieces of wood a and B with mass M1 and M2 are stacked on a smooth horizontal table (B is above a). The dynamic friction coefficient between a and B is μ
Two pieces of wood a and B with mass of M1 and M2 are stacked on a smooth horizontal table (B is above a), and the dynamic friction coefficient between a and B is μ. If B is to be pulled out from the upper surface of a, what conditions should be met for the horizontal tension of B (assuming that the sliding friction is equal to the maximum static friction) Thank you first~
More than M2 (M1 + m2) μ g / M1

If f is very small (less than the sliding friction between B and a), a and B are relatively stationary, and their acceleration is the same, the friction between them belongs to static friction, Two objects are about to be separated. If f is large (greater than the sliding friction between B and a), then the acceleration of B is greater than that of a, then the two objects will be separated. Therefore, the separation condition of two objects is that the acceleration of B is greater than that of A. next, let's find the acceleration of both objects
Acceleration of B: (f-um2g) / m2
Acceleration of a: um2g / M1
If the acceleration of B is greater than that of a, f > M2 (M1 + m2) μ g / M1 can be obtained