The correct choice is
B. sublimation, then condensation
Sublimation is the name of the process where a solid directly converts into gas on heating. on heating solid crystals of iodine directly change into gas. hence this is sublimation.
condensation is the process where gas is converted into liquid on cooling.
here iodine gas is being converted into droplets on reducing the temperature. hence this is condensation.
Answer:
To convert 400 mm to m you can apply the formula [m] = [mm] / 1000; use 400 for mm. Thus, the conversion 400 mm m is the result of dividing 400 by 1000. 0.4
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De broglie wavelength,
, where h is the Planck's constant, m is the mass and v is the velocity.
![h = 6.63*10^{-34}](https://tex.z-dn.net/?f=h%20%3D%206.63%2A10%5E%7B-34%7D)
Mass of hydrogen atom, ![m = 1.67*10^{-27}kg](https://tex.z-dn.net/?f=m%20%3D%201.67%2A10%5E%7B-27%7Dkg)
v = 440 m/s
Substituting
Wavelength ![\lambda = \frac{h}{mv} = \frac{6.63*10^{-34}}{1.67*10^{-27}*440} = 0.902 *10^{-9}m = 902 *10^{-12}m](https://tex.z-dn.net/?f=%5Clambda%20%3D%20%5Cfrac%7Bh%7D%7Bmv%7D%20%3D%20%5Cfrac%7B6.63%2A10%5E%7B-34%7D%7D%7B1.67%2A10%5E%7B-27%7D%2A440%7D%20%3D%200.902%20%2A10%5E%7B-9%7Dm%20%3D%20902%20%2A10%5E%7B-12%7Dm)
![1 pm = 10^{-12}m\\ \\ So , \lambda =902 pm](https://tex.z-dn.net/?f=1%20pm%20%3D%2010%5E%7B-12%7Dm%5C%5C%20%5C%5C%20So%20%2C%20%5Clambda%20%3D902%20pm)
So the de broglie wavelength (in picometers) of a hydrogen atom traveling at 440 m/s is 902 pm
Answer:
The deformation is 0.088289 m
The final height of the monument is 170-0.088289 = 169.911702 m
Explanation:
Thermal coefficient of marble varies between (5.5 - 14.1) ×10⁻⁶/K = α
So, let us take the average value
(5.5+14.1)/2 = 9.8×10⁻⁶ /K
Change in temperature = 35-(-18) = 53 K = ΔT
Original length = 170 m = L
Linear thermal expansion
![\frac{\Delta L}{L} = \alpha\Delta T\\\Rightarrow \Delta L=\frac{\alpha\Delta T}{L}\\\Rightarrow \Delta L=9.8\times 10^{-6}\times 53\times 170](https://tex.z-dn.net/?f=%5Cfrac%7B%5CDelta%20L%7D%7BL%7D%20%3D%20%5Calpha%5CDelta%20T%5C%5C%5CRightarrow%20%5CDelta%20L%3D%5Cfrac%7B%5Calpha%5CDelta%20T%7D%7BL%7D%5C%5C%5CRightarrow%20%5CDelta%20L%3D9.8%5Ctimes%2010%5E%7B-6%7D%5Ctimes%2053%5Ctimes%20170)
The deformation is 0.088289 m
The final height of the monument is 170-0.088289 = 169.911702 m (subtraction because of cooling)