Radius of circle of spiral path = 6 m
Time period = 5 s
So the total length of the path = 
time taken by bird to cover the distance = 5 s
so the speed of the bird = distance / time
so the tangential speed in horizontal direction = 7.54 m/s
vertical velocity by which it is rising upwards = 3 m/s
so the angle with the horizontal for net speed is given as
so velocity vector will make 21.7 degree with the horizontal
The floating of ice helps keep the ocean warm because it keeps the ice at the top of the ocean in certain places. But it also helps aquatic life keep in there Necessary environmental conditions.
`1.Many galaxies exist.
3.Most galaxies are moving away from us.
4.Uniform background radiation is detected in every direction.
Explanation:
The Big bang theory is a theory explaining the formation of the universe from the early stages to today.According to the theory , the universe started as a hot ,small , & dense super-force with no singularity(atom, structure, form).The evidence of this theory include;
- systematical shifting of the galaxies away from us
- A radiation called cosmic microwave background radiation only explained by the theory
- Larger redshifts causing great drop off in the number of quasar
- Abundance of different elements in the universe such as hydrogen and lithium checked through spectra of oldest stars and gas clouds.
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Big bang theory:brainly.com/question/1581355
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Astronomer Cladius Ptolemy believed that the earth was the center of the solar system and all other planets rotated around it.
Approximately 500 years ago, another astronomer, Nicolaus Copernicus theorized that the planets’ orbits should be plotted with respect to the Sun.
Hence, the role of Earth changed to a planet status, however, all planets were proven to revolve around a fixed point being the Sun.
True because it is easier to manage fewer things so it will be more effective.
