1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
N76 [4]
3 years ago
8

Which material is the best heat insulator? metal wood plastic glass

Physics
2 answers:
LuckyWell [14K]3 years ago
6 0

Answer:

Wood

Explanation:

The measure of any material to conduct heat is called its thermal conductivity. The thermal conductivity of metal is very high as compared to insulators and semiconductors.

The thermal conductivity of wood is 0.12-0.04 W/m K. Plastics have thermal conductivity of 0.2 W/m K. The thermal conductivity of fiber glass or foam glass is 0.045 W/m K

Wood is a best heat insulator. This is because, the atoms of wood have much tightly bound electrons.              

Hence, the correct option is (b).                    

OlgaM077 [116]3 years ago
5 0
Of the materials listed wood is the best insulator. It would be the least hot if exposed to similar temperatures.
You might be interested in
Learning Goal:To understand and be able to use the rules for determining allowable orbital angular momentum states.Several numbe
Free_Kalibri [48]

Answer:

Explanation:

1) for a given n value the l value can be from 0 to n-1

So if n= 5 it can take 0,1,2,3,4

i.e it can take 5 values

2)for an electron with l =3

it can be from -3 -2 -1 0 1 2 3

i.e it can take 7 values

3) n = 3 !!

l = 0 , 1 , 2

for l=0 , m = 0 total = 1

for l= 1 ,m = -1,0,1 total = 3

for l = 2, m=-2,-1,0,1,2 total = 5

5+3+1 = 9

total possible states = 9 * 2 = 18

Answer is 168

4)given l=3 and n=3

orbital quantum number cannot be equal to principal quantum number

its max value is l-1 only

5)L = sqrt(l(l+1))x h'

for it to be max l should be max

for n = 3 max l value is 2

therfore it is sqrt(2(2+1)) x h'

\sqrt(6) \times h'

this is the answer

5 0
3 years ago
Which characteristic should a good scientific question have?
Brilliant_brown [7]
The best answer to this question is D. a god scientific question should be based on observations instead of just imagination.

Hope this helps.
7 0
3 years ago
Read 2 more answers
Stio
Ainat [17]

The true statements about magnetic fields and forces will be A,D and E.

<h3>What is a magnet?</h3>

An iron piece,alloy, or other substance with its constituent atoms arranged in such a way that it shows magnetism qualities,

The function of the magnet is attracting other iron-containing objects or aligning itself in a magnetic field.

There are two poles of the magnet;

1. North Pole.

2. South Pole.

The same poles repel each other, while the opposite poles attract each other. In a sense, south-south and north-north repel. While the north-south and the south-north attract each other.

The correct statements are;

(A). The north pole attracts the south pole of a magnet.

(D)Forces caused by magnetic fields are weaker farther from the magnet.

(E)Magnetic forces can act on an object even if the object isn't touching the magnet.

Hence, the true statements about magnetic fields and forces will be A,D and E.

To learn more about the magnet, refer to the link;

brainly.com/question/13026686

#SPJ1

3 0
2 years ago
Why is nuclear energy non renewable
QveST [7]

Answer:

It is because it cannot be used time again and again.

8 0
3 years ago
Read 2 more answers
A student places two books on a table. One book weighs less than the other book
Gnoma [55]
The book that weighs less
6 0
2 years ago
Other questions:
  • Was the color orange named after the fruit or was the fruit named after the color ​
    12·1 answer
  • From what characteristic do vertebrates get their name
    9·1 answer
  • An object weighs 100 newtons on earth's surface when it is moved to a point one earth radius above earth's surface it will weigh
    10·2 answers
  • What is the PE of an object with a mass of 10 kg, and 2 meters up
    12·2 answers
  • organisims that have a physical trait that makes it easier for them o access food supply are unlikely to pass on that trait to t
    14·1 answer
  • Which of the following best illustrates the role that gravity played in the formation of the solar system?
    7·1 answer
  • Jenny puts a book on her desk. she lifts the book up with her finger, using a force of 0.5N .The cover is 10cm wide .
    12·1 answer
  • the average time required for radioactive elements, whereby they decay to half their original mass is called the "average life"
    10·2 answers
  • For which planet is the length of the plants day longer than the planets year
    8·1 answer
  • A baseball player hits a line drive horizontally from a height of 1 m.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!