Answer:
Unusually large moons form in giant impacts, which are relatively rare events
Explanation:
Solution:
- Finding large moons comparable in size to their planets result from impacts of two astro-bodies. The probability of such an event occurring is very rare.
- Even at the best luck, one moon can be made from the result of giant impact. While the probability of 6 planets having moons of comparable sizes is close to impossible. The transition from an undifferentiated cloud to a star system complete with planets and moons takes about 100 million years.
Answer:
The Moon itself does not generate light
Explanation:
The Moon itself does not generate light; it is lit up by the Sun. As the Moon orbits the Earth, the portion of illuminated Moon that we see changes – giving rise to the phases of the Moon. Starting at the New Moon phase, the Moon appears to expand in illumination.
Answer:
The critical angle is 
Explanation:
From the question we are told that
The refractive index of the core is 
The refractive index of the cladding is 
Generally according to Snell's law
Here for total internal reflection the refractive angle is 
and the critical angle is equal to the critical angle so 
substituting values
![\theta_c = sin^{-1} [\frac{1.21}{1.35} ]](https://tex.z-dn.net/?f=%5Ctheta_c%20%20%3D%20sin%5E%7B-1%7D%20%5B%5Cfrac%7B1.21%7D%7B1.35%7D%20%5D)
Answer: A streain with a velocity ... The rate at which particles are deposited by a stream is least affected ... (4) Particles lose potential energy during erosion and gain potential .
Explanation:
