Answer:
The fourth planet from the sun is Mars. There are 8 planets in our solar system. Its a source of debate of whether or not Pluto is a planet so there is 8 planets and not 9.
Explanation:
Answer:
A longitudinal study is a research design that involves repeated observations of the same variables over short or long periods of time. It is often a type of observational study, although they can also be structured as longitudinal randomized experiments.
Explanation:
The correct order of processes leading up to the formation of a main sequence star is : ( C ) Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.
<h3>What is a main sequence star ?</h3>
A main sequence star is a group of stars which forms a band of stellar types usually 90 percent when plotted on a graph ( spectrum vs luminosity) it also represents the life stages of a regular star in the galaxy.
In conclusion the correct order of the main sequence star is; Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.
Learn more about main sequence star : brainly.com/question/1966525
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Answer:
10⁶ or 1000000
Explanation:
<h2>formula: frequency = velocity/wavelength =
</h2><h2 /><h3>i'm not sure because the teacher probably wrote the question wrong.</h3>
i think that the answer is
D. inclined plane