Explain the working of thermos flask in simple and easy words

Physics

1 answer:

AleksandrR [38]3 years ago

7 0

Answer:

a thermos is designed to keep hot things hot by not allowing heat to escape.

Explanation:

A thermos is a bottle with a double-walled container inside of it. The air between the two walls is sucked out during construction, creating a vacuum.

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maxonik [38]

The electron is accelerated through a potential difference of $\Delta V=780 V$ , so the kinetic energy gained by the electron is equal to its variation of electrical potential energy:
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$evB=m \frac{v^2}{r}$
where B is the intensity of the magnetic field and r is the orbital radius. Since the radius is r=25 cm=0.25 m, we can re-arrange this equation to find B:
$B= \frac{mv}{er}= \frac{(9.1 \cdot 10^{-31}kg)(1.66 \cdot 10^7 m/s)}{(1.6 \cdot 10^{-19}C)(0.25 m)} =3.8 \cdot 10^{-4} T$

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Explain the working of thermos flask in simple and easy words ​

Explain the working of thermos flask in simple and easy words