if an object is moving at a constant speed in a changing direction, What is the acceleration of the object (zero or not zero)
1 answer:
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Answer:
a The diagram of the situation is shown on the first uploaded image
b the angle of incidence beam striking the water is
c the angle of refraction beam striking the water is
d The angle the refracted beam make with respect to the horizontal is
e The height of the target above sea level is
Explanation:
From the diagram we see that the angle of the beam striking the water is
According to Snell's law
Where is the refractive index of water = 1.333
is the angle of incidence
is the refractive index of air = 1
r is the angle of refraction
Substituting values accordingly
Making r the subject of the formula
looking at the diagram we can see that to obtain the angle the refraction beam makes with the horizontal by subtracting the angle refraction from 90°
i.e °
From the diagram we see that the height target above sea level can be obtained by this relation
Where h is the is the height
Answer: The hierarchical formation model suggests that galaxies may have been formed by subsequent mergers of smaller galaxies and that today each galaxy houses at least a supermassive black hole.
Explanation: During a fusion of galaxies, the stars that composes it suffer the tidal force, intensifying your action as the galaxies approaching. When two galaxies merges themselves, the astronomers believes that they loss a huge part of their mass, forming the supremassive black hole, that stays in the middle of the galaxie.
The supermassive black holes are originated from the evolution of high mass stars. They were formed by huge clouds of gas or clusters of millions of stars that collapsed on their own gravity when the universe was still much younger and denser.
