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Nataliya [291]
3 years ago
13

How does a thermo flask retain heat​

Physics
1 answer:
Hoochie [10]3 years ago
7 0

Answer:

A thermo flask has a <u>cork</u> which prevents heat loss by <u>conduction</u><u>.</u>

It also has <u>vacuum</u> which prevents heat loss by <u>convection.</u>

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Answer:

true

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3 years ago
The position of an electron is measured within an uncertainty of 0.100 nm. What will be its minimum position uncertainty 2.00 s
Tanya [424]

Answer:

Minimum uncertainty in position is \Delta x= 1157808.48\ m

Explanation:

It is given that,

Uncertainty in the position of an electron, \Delta x=0.1\ nm=0.1\times 10^{-9}\ m

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\Delta x.\Delta p\geq \dfrac{h}{4\pi}

\Delta x.m\Delta v\geq \dfrac{h}{4\pi}

\Delta v\geq \dfrac{h}{4\pi \times \Delta x\times m}

\Delta v\geq \dfrac{6.62\times 10^{-34}\ J-s}{4\pi \times 0.1\times 10^{-9}\ m\times 9.1\times 10^{-31}\ kg}

\Delta v\geq 578904.24\ m/s

Let \Delta x is the uncertainty in position after 2 seconds such that,

\Delta x=\Delta v\times t

\Delta x=578904.24\ m/s\times 2\ s

\Delta x= 1157808.48\ m

or

\Delta x= 1.15\times 10^6\ m

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7 0
3 years ago
You and I see, hear, and think with ___________________________. Waves carry _____________________. The wave in the speaker, on
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less  ___ the wavelength

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3 years ago
An acorn falls 10 meters in 4 seconds. What is its average velocity?
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