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
rewona [7]
3 years ago
11

How does the vacuum between the inner and outer walls of a thermos bottle limit energy loss through conduction and convection?

Physics
1 answer:
Vitek1552 [10]3 years ago
3 0
By having no solid matter between the walls (like styrofoam) conduction is eliminated since conduction requires matter to be in contact with other matter.  The vacuum state eliminates convection since that is the heating of gas that then carries the energy to another body by traveling there and exchanging heat with it.
You might be interested in
A tortoise can run with a speed of 0.14 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, b
Reptile [31]

speed of tortoise is given as v1 = 0.14 m/s

speed of hare is given as v2 = 20*0.14 = 2.8 m/s

now let say the total length of the path is "d"

so the total time taken by the tortoise to cover this

t = \frac{d}{0.14}

now given that hare took rest for 1 min

so total time of run for hare is (t - 60)s

so the distance that hare covered is given by

d - 0.30 = 2.8 * (t - 60)

now by above two equations

d - 0.30 = 2.8 * \frac{d}{0.14} - 168

168 - 0.30 = (20 - 1)d

d = 8.82 m

and the time t is given by

t = \frac{8.82}{0.14}

t = 63 s

so part a)

t = 63 s

part b)

d = 8.82 m

4 0
3 years ago
The distance between two charged objects is doubled. What happens to the electrostatic force between the two?a)It will double.b)
zzz [600]

Answer:

d) It will be cut to a fourth of the original force.

Explanation:

The magnitude of the electrostatic force between the charged objects is

F=k\frac{q_1 q_2}{r^2}

where

k is the Coulomb's constant

q1 and q2 are the charges of the two objects

r is the separation between the two objects

In this problem, the initial distance is doubled, so

r' = 2r

Therefore, the new electrostatic force will be

F=k\frac{q_1 q_2}{(r')^2}=k\frac{q_1 q_2}{(2r)^2}=\frac{1}{4}(k\frac{q_1 q_2}{r^2})=\frac{1}{4}F

So, the force will be cut to 1/4 of the original value.

5 0
3 years ago
What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of​
rewona [7]

Answer:

This what they all been waiting for

I guess so

They been waiting for this sh,it for a long time didn't they

I'ma give it everything I got

Ayo Dougie park that X6 around the corner

Aye I'm just feeling my vibe right now

I'm feeling myself

Explanation:

3 0
3 years ago
An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature, this element is a very
Grace [21]

Answer:

12 neutrons

Explanation:

The number of protons also shows the atomic number. Therefore the element in question is Krypton (Kr), which also is a noble gas.

Neutrons = Mass number - protons - electrons

Here neutrons = 84 - 36 - 36 = 12

5 0
3 years ago
A(n) _________________ is a push or pull that one object exerts on another
Naya [18.7K]

Answer:

Explanation

     it is a force

5 0
2 years ago
Other questions:
  • What is the medium for this wave?
    11·1 answer
  • Which of the following would be an example of an uncontrolled experiment? The effect of salt and water being mixed at different
    10·1 answer
  • How can you best identify quackery in a health service provider?
    10·1 answer
  • Why does an object accelerate when it falls toward the earth's surface
    12·2 answers
  • 2. A 3.45-kg centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration. A point
    10·2 answers
  • What happens to the gravitation force between two objects that are 15 m apart, when one of them moves 3 m closer?
    9·1 answer
  • students make a small elevator machine with 5 kg and 10 kg masses on either side how fast will the masses accelerate once they a
    8·1 answer
  • starting from rest , a formula one car accelerates uniformly at 25m\s2 for 30secs. what distance does it cover in the last one s
    7·1 answer
  • Which object has the greatest acceleration
    14·1 answer
  • Please help me!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!