Answer:
4.2×10⁷ m/s
Explanation:
L = length observed by an observer
L₀ = Proper length
v = Velocity of the rocket ship
Length contraction formula
The speed of the ship would be 4.2×10⁷ m/s
Answer:
Pleural cavity
Explanation:
Pleural cavity is thin fluid filled space that surrounds the lungs and provide lubrication during the expansion and contraction. So if the bullet enters the left lung then it has been entered in the pleural cavity.
Pericardial cavity contains heart and other blood vessals so it is not the right option. Mediastinum is the area between the lungs that contains the heart parts so it not the right option too. Then comes the vertebral canal also known as spinal cord so it has nothing to do with the lungs. Hence the correct option is Pleural cavity.
Answer:
Star formation occurs most rapidly in the spiral arms, where the density of interstellar matter is highest.
Answer: C. Galactic disk
Explanation:
The part of the Milky Way which allows the determination of it rotational direction is known as the Galactic disk. This disc are shaped because they contain gases which are rich and dynamically young. It is also a part of a group of a galaxies disc is a component of disc galaxies, known as spiral galaxies and lenticular galaxies.
Answer:
7.81 moles of Neon.
Explanation:
From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ atoms. This simply means that 1 mole of Neon also contains 6.02×10²³ atoms.
From the above illustration, we can convert 4.7×10²⁴ atoms of Neon to moles. this is illustrated below:
6.02×10²³ atoms = 1 mole
Therefore,
4.7×10²⁴ atoms = (4.7×10²⁴ × 1)/6.02×10²³
4.7×10²⁴ atoms = 7.81 moles
Therefore, 4.7×10²⁴ atoms of Neon is equivalent to 7.81 moles of Neon.
