It doesn't. We do.
We rotate in such a way that the sun looks like it is rising and falling, but it really isn't.
Only B is correct.
The index of refraction is lower in the second medium than it was in the first ✓
According to the question : Which statement is true of light when it speeds <em>up</em> on entering another medium?
If the refractive index was greater than the 1st medium (like in answer A) light speed reduces.
But if the refractive index was lower, speed of light increases.
Weight = (mass) x (gravity).
It always acts downward.
On Earth, the acceleration of gravity is 9.807 m/s².
On the Moon, the acceleration of gravity is 1.623 m/s².
On Earth, the rocket's weight is (0.8kg) x (9.8 m/s²) = 7.84 newtons
On the Moon, the rocket's weight is (0.8kg) x (1.62 m/s²) = 1.3 newtons
The force of the rocket engine acts upward.
Its magnitude is 12 newtons. (From the burning chemicals.
Doesn't depend on local gravity. Same force everywhere.)
Now we have all the data we need to mash together and calculate the
answers to the question. You might choose a different method, but the
machine that I have selected to do the mashing with is Newton's 2nd law
of motion:
Net Force = (mass) x (acceleration).
Since the question is asking for acceleration, let's first solve Newton's law
for it. Divide each side by (mass) and we have
Acceleration = (net force) / (mass) .
On Earth, the forces on the rocket are
(weight of 7.84 N down) + (blast of 12 N up) = 4.16 newtons UP (net)
Acceleration = (4.16 newtons UP) / (0.8 kg) = 5.2 m/s² UP .
On the moon, the forces on the rocket are
(weight of 1.3 N down) + (blast of 12 N up) = 10.7 newtons UP (net)
Acceleration = (10.7 newtons UP) / (0.8 kg) = 13.375 m/s² UP
The s s -subshell has only one orbital while the p p -subshell has three orbitals. Thus, a total of four orbitals are present which can contain a maximum of 4×2 4 × 2 = 8 8 electrons. So eight electrons can have this quantum number.