Answer:
λ = 5.75 10⁻⁷ mm
Explanation:
This is a slit interference exercise, we analyze each wavelength separately
λ = 657 nm indicate that the third dark pattern
a sin θ = (m + ½) lam
a sin θ = (3 + ½) 657 10⁻⁹
a sin θ = 2299.5 10⁻⁹ nm
for the other wavelength in the same place we have m = 4 bright
a sin θ = m lam
we substitute
2299.5 10⁻⁹ = 4 λ
λ =
λ = 5.75 10⁻⁷ mm
Answer:
Move the small car so it appears on the left side of the lens.
Explanation:
Option B
Answer:
T_2= 234.37 K
Explanation:
According to Claperyon, we know that
![P_2-P_1= \frac{\Delta H_{fus}}{\Delta V}\times\frac{T_1}{T_2}](https://tex.z-dn.net/?f=P_2-P_1%3D%20%5Cfrac%7B%5CDelta%20H_%7Bfus%7D%7D%7B%5CDelta%20V%7D%5Ctimes%5Cfrac%7BT_1%7D%7BT_2%7D)
P_1= Atmospheric pressure 760 mm Hg
P_2 = pressure at the bottom of the column
= 10×10^3 mm of Hg+ 760 mm of Hg
= 10760 mm of Hg
now,
P_2-P_1= 10760-760= 10^4 mm
P_2-P_1 ( in pascals) = 10^4× 133.322= 1333220 mm
the enthalpy of fusion (ΔH-fus) of mercury is 2.292 KJ/mol
use the above equation to calculate ΔT as follows
![1333220= \frac{2292}{0.517\times10^{-6}}\times ln\frac{T_2}{234.3K}](https://tex.z-dn.net/?f=1333220%3D%20%5Cfrac%7B2292%7D%7B0.517%5Ctimes10%5E%7B-6%7D%7D%5Ctimes%20ln%5Cfrac%7BT_2%7D%7B234.3K%7D)
therefore, T_2= 234.37 K
Answer : <em>Her weight is lower on Venus because the acceleration due to gravity is lower.</em>
Explanation :
Venus is also called as Earth's twin. This is because both the mass and the size of Earth and Venus are almost same. The acceleration due to gravity on earth is
while on Venus is
.
So, when Shari measure her weight on Venus she found her weight is lower on Venus. This is because the acceleration due to gravity is lower on the surface of Venus as compared to the Earth.
Since, ![w=mg](https://tex.z-dn.net/?f=w%3Dmg)
i.e. weight depends on g.
<em>So, correct prediction is (b)</em>