What is the practical significance of dielectric constant? What does a lower dielectric constant mean?

What is the practical significance of dielectric constant? What does a lower dielectric constant mean?

The physical quantity that characterizes the polarization degree of a medium under the action of an external electric field is called the dielectric constant. (under the action of an alternating electric field, the dielectric constant of the medium is a complex number, and the imaginary part reflects the loss of the medium). In fact, the dielectric constant is not a constant number, and it is not the same under different conditions

What is tensor?

Tensor: if a physical quantity must be described by an n-order square matrix and meet some specific operation rules (that is, the results obtained by the square matrix through these operations are indicated by the rules), then the physical quantity described by the square matrix is called tensor. For example: a vector is a 2-order tensor, which can be described by a 2-order square matrix

Parking regulations: parking time in 1 hour charge 2.50 yuan, more than 1 hour, every 0.5 hour charge 2.50 yuan, Uncle Li paid 12.5 yuan parking fee. He parking in this parking lot______ Hours

(12.5-2.50) △ 2.50 △ 0.5) + 1, = 10 △ 5 + 1, = 2 + 1, = 3 (hours); answer: he parks in this parking lot for 3 hours

July 1st is Sunday, so what day is the 31st?
Request algorithm

31-1=30
30/7=4…… two
Two days after Sunday is Tuesday

Today is Monday, 11.13, three days later. What's the day of the week,

Date - week
11.13——1
11.14——2
11.15——3
11.16——4

There are 1800 peach, plum and apricot trees in an orchard. The number of peach trees is twice that of plum trees. The number of plum trees is twice that of apricot trees. How many peach, plum and apricot trees are there in the orchard?
There are 1500 bales of cement in the two freight yards. If 36 bales of cement are taken out from yard a and 6 bales are taken out from yard B every day, after 14 days, the remaining cement in yard B is just 5 times of that in yard A. how many bales of cement are there in each yard?
There are 330 male and female students in a school, of which the number of male students is twice that of female students. How many female students are there?

The title is incomplete. I'll change it
There are 1800 peach, plum and apricot trees in an orchard. The number of peach trees is twice that of plum trees, and the number of plum trees is one third of that of apricot trees. How many peach, plum and apricot trees are there in the orchard?
Suppose there are x plum trees, 2x peach trees and 3x apricot trees
x+2x+3x=1800
x=300
Peach trees = 2x = 2 * 300 = 600
Apricot tree = 3x = 3 * 300 = 900
Plum = x = 300
If the original cement package X in site a is set, then the original cement package (1500-x) in site B is set
5(x-14*36)=1500-x-14*6
x=656
Original cement quantity in site B = 1500-x = 1500-656 = 844 bales
Original cement quantity of yard a = 656 bales
Set the number of girls as X and boys as 2x
x+2x=330
x=110
Number of female students = x = 110
2X = 2 boys = 110

30 simple calculation questions in primary school mathematics
Don't be too difficult, just simple!

158+262+138
375+219+381+225
5001－247－1021－232
（181+2564）+2719
378+44+114+242+222
276+228+353+219
(375+1034)+(966+125)
(2130+783+270)+1017
99+999+9999+99999
7755－(2187+755)
2214+638+286
3065－738－1065
899+344
2357－183－317－357
2365－1086－214
497-299
2370+1995
3999+498
1883-398
12×25
75×24
138×25×4
(13×125)×(3×8)
(12+24+80)×50
704×25
25×32×125
32×(25+125)
88×125
102×76
58×98
178×101－178
84×36+64×84
75×99+2×75
83×102－83×2
98×199
123×18－123×3+85×123
50×(34×4)×3
25×（24+16）
178×99+178
79×42+79+79×57
7300÷25÷4
8100÷4÷75
16800÷120
30100÷2100
32000÷400
49700÷700
1248÷24
3150÷15
4800÷25
21500÷125
Additional questions:
2356－（1356－721）
1235－（1780－1665）
75×27+19×2 5
31×870+13×310
4×(25×65+25×28)

A bedroom is 36 decimeters long and 30 decimeters wide. If you want to use square bricks to cover the whole room, how many centimeters is the maximum side length of the square bricks suitable? How many pieces are there in total?

36*30=1080dm2
1080*10=10800cm2
10800/3=3600cm2
3600/6=600cm
in summary:
The side length is 600cm, 3 pieces are needed

On both sides of a balance, 12 white balls are placed on one side, 3 black balls and 1 red ball are placed on the other side, which is in a state of equilibrium. If 8 white balls and 1 black ball are placed on one side, and 1 red ball is placed on the other side, the balance is also in a state of equilibrium?

From the second condition, one red ball is equivalent to eight white balls and one black ball
Replace the red ball on the right in the first condition with 8 white balls and 1 black ball, so that 12 white balls are equivalent to 8 white balls and 4 black balls
So white and black balls are equal weight
So one red ball is equivalent to nine white balls

Finding the solution of 12.5x-0.75x + 3 = 7.3-1.5x

11·75X+3=7·3-1·5X
11·75X+1·5X=7·3-3
13·25X=4·3
X=0·325