Answer:
The kinetic energy of an electron is ![1.54\times10^{-15}\ J](https://tex.z-dn.net/?f=1.54%5Ctimes10%5E%7B-15%7D%5C%20J)
Explanation:
Given that,
Distance = 0.1 nm
We need to calculate the momentum
Using uncertainty principle
![\Delta x\Delta p\geq\dfrac{h}{4\pi}](https://tex.z-dn.net/?f=%5CDelta%20x%5CDelta%20p%5Cgeq%5Cdfrac%7Bh%7D%7B4%5Cpi%7D)
![\Delta p\geq\dfrac{h}{\Delta x\times 4\pi}](https://tex.z-dn.net/?f=%5CDelta%20p%5Cgeq%5Cdfrac%7Bh%7D%7B%5CDelta%20x%5Ctimes%204%5Cpi%7D)
Where,
= change in momentum
= change in position
Put the value into the formula
![\Delta p=\dfrac{6.6\times10^{-34}}{4\pi\times10^{-10}}](https://tex.z-dn.net/?f=%5CDelta%20p%3D%5Cdfrac%7B6.6%5Ctimes10%5E%7B-34%7D%7D%7B4%5Cpi%5Ctimes10%5E%7B-10%7D%7D)
![\Delta p=5.3\times10^{-23}](https://tex.z-dn.net/?f=%5CDelta%20p%3D5.3%5Ctimes10%5E%7B-23%7D)
We need to calculate the kinetic energy for an electron
![K.E=\dfrac{p^2}{2m}](https://tex.z-dn.net/?f=K.E%3D%5Cdfrac%7Bp%5E2%7D%7B2m%7D)
Where, P = momentum
m = mass of electron
Put the value into the formula
![K.E=\dfrac{(5.3\times10^{-23})^2}{2\times9.1\times10^{-31}}](https://tex.z-dn.net/?f=K.E%3D%5Cdfrac%7B%285.3%5Ctimes10%5E%7B-23%7D%29%5E2%7D%7B2%5Ctimes9.1%5Ctimes10%5E%7B-31%7D%7D)
![K.E=1.54\times10^{-15}\ J](https://tex.z-dn.net/?f=K.E%3D1.54%5Ctimes10%5E%7B-15%7D%5C%20J)
Hence, The kinetic energy of an electron is ![1.54\times10^{-15}\ J](https://tex.z-dn.net/?f=1.54%5Ctimes10%5E%7B-15%7D%5C%20J)
Answer: demesne lands
Explanation:
" (demesne lands) which were for the personal use of the lord of the manor."
Ice wedging, as described in the passage, is an example of mechanical
weathering.
Mechanical weathering is also known as physical weathering and it
involves the breaking of rock into smaller particles without causing changes
in the chemical properties.Mechanical weathering is usually carried through
physical processes such as freezing and thawing etc.
In this scenario, we were told that water freezes, expands and presses
against the walls of the crack thereby breaking into smaller parts which is a
physical process hence mechanical weathering being present.
Read more about Mechanical weathering on brainly.com/question/458304
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Heat = mass CH3OH x spht CH3OH x delta T
<span>= (50 g)(2.51 J/g K)(40 K) = 5020 J </span>
<span>Note that delta T is the same for K as for C.</span>
Answer:
Explanation:
Behind the second car , no of cars = 13
total mass of 13 cars = 13 x 37000 Kg
acceleration = .46 m /s²
If T be the tension
This tension is pulling 13 cars
force = mass x acceleration.
T = 13 x 37000 x .46
= 221260 N .