Answer:
The opening must be placed in the lower parts of the wall.
Explanation:
The hot air is less dense than the cold air and therefore, in an environment that needs to be heated, the openings for the hot air outlet must be placed in the lower areas of the ground, allowing the incoming hot air to be able to go up, due to its low density, and warm the entire room in a balanced way. If the opening is placed too high, the hot air will rise further and will not heat the room.
The Northernmost Japanese island is Hokkaido, while the southernmost is Kyushu.
Answer:
9090.90 Km/s
Explanation:
Given:
hydrogen has a spectral line at = 165 nm
Line is observed at = 170 nm
Now, from the Hubble's law
Where,
v is the velocity
Δλ = Change in wavelength = 170 - 165 = 5 nm
λ = Actual wavelength
C is the speed of the light
on substituting the respective values, we get
or
v = 90.90909 × 10⁵ m/s
or
v = 9090.90 Km/s
I’m pretty sure the answer is B.