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
Rzqust [24]
3 years ago
10

How do heat insulators work

Physics
2 answers:
adelina 88 [10]3 years ago
5 0
How they work is that they help keep the heat in and cool air out.
a_sh-v [17]3 years ago
4 0
The heat is transferred to one material to another, however insulators minimize that transfer, keeping it in the area, warming it. 
You might be interested in
About ________ percent of wais scores fall between 70 and 130.
stiv31 [10]
It is about 95%. The Wechsler Adult Intelligence Scale-IV is an IQ test that is given by therapists and measures worldwide scholarly working. It incorporates both verbal and nonverbal parts. The normal score for all tests and subtests is 100; therefore, a score of more than 100 is better than expected and beneath 100 is underneath normal.
5 0
3 years ago
A cat pushes a mouse horizontally on a frictionless floor with a net force of 1.0 N 1.0N1, point, 0, start text, N, end text for
vesna_86 [32]

Answer: 3

Explanation:

8 0
3 years ago
What is the velocity if your going 105 miles every 10 minutes
Afina-wow [57]
The speed is 10.5 miles per minute, or 630 miles per hour.
We don't know the velocity, because you didn't tell us anything about the direction I'm going.
8 0
3 years ago
Read 2 more answers
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. what is the value
Dimas [21]

Answer:

n_f=2

Explanation:

It is given that,

Initially, the electron is in n = 7 energy level. When it relaxes to a lower energy level, emitting light of 397 nm. We need to find the value of n for the level to which the electron relaxed. It can be calculate using the formula as :

\dfrac{1}{\lambda}=R(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})

\dfrac{1}{397\times 10^{-9}\ m}=R(\dfrac{1}{n_f^2}-\dfrac{1}{(7)^2})

R = Rydberg constant, R=1.097\times 10^7\ m^{-1}

\dfrac{1}{397\times 10^{-9}\ m}=1.097\times 10^7\ m^{-1}\times (\dfrac{1}{n_f^2}-\dfrac{1}{(7)^2})

Solving above equation we get the value of final n is,

n_f=2.04

or

n_f=2

So, it will relax in the n = 2. Hence, this is the required solution.        

6 0
3 years ago
Read 2 more answers
If you double the voltage in a circuit and reduce the resistance by a factor of four what will happen to the current? A) it will
KatRina [158]
By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.

V = IR
V1/2V1 = I1R1 / I2R1/4
1/2 = 4I1/I2
I2 = 8I1

Therefore, <span> it will increase by a factor of 8. Hope this answers the question.</span>
5 0
3 years ago
Other questions:
  • When the distance between a point source of light and a light meter is reduced from 6.0m to 2.0 m, the intensity of illumination
    14·1 answer
  • Suppose you are driving in a car. A truck drives past you, traveling in the same direction you are driving. Which statement best
    5·1 answer
  • A cannonball fired with an initial speed of 40 m/s and a launch angle of 30 degrees from a cliff that is 25m tall.
    12·1 answer
  • What is the conversion factor between km/h2 and m/s2?
    6·1 answer
  • Heat is conducted when one atom or molecule collides with and
    13·2 answers
  • What mass of a material with density rho is required to make a hollow spherical shell having inner radius r1 and outer radius r2
    7·1 answer
  • The four balls have different masses and speeds.
    11·2 answers
  • A study group is meeting to prepare for an upcoming social studies test on the Civil War. Which question would you
    8·2 answers
  • This ray diagram shows the image formed when a candle is placed in front of
    15·1 answer
  • An object of height 8.50 cm is placed 20.0 cm to the left of a converging lens with a focal length of 12.0 cm. Determine the ima
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!