The present motions of the planets were inherited from the rotation of the solar nebula

Indicate whether the statement is true or false


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Physics & Space Science

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Stellar and galactic crowding: The comparison of objects' sizes to the distance between them gives a sense of their relative density, i.e., how "crowded" they are. A typical human is about 1 meter across the shoulders

Compare the relative density of people in the case where they are standing on average 1 meter apart compared to a situation where they are on average 10 meters apart (hint: describe the separation in units of person-size). Now, compare the "crowding" of stars to that of galaxies. A typical star has a diameter of about 1 million km, while the average space between stars is about 5 light-years. A typical spiral galaxy in a cluster (such as the Milky Way) is 100,000 light-years across, and has another spiral galaxy within about 10 million light years.

Physics & Space Science

Why do we use fuses?

a. to eliminate shock hazards b. to prevent fires c. to save on the cost of electricity d. to store charge

Physics & Space Science

Relative to the age of the universe, how old is our solar system?

A) It is about 1% as old as the universe. B) It is about one-third the age of the universe. C) It is nearly the same age as the universe. D) It is between about 5% and 10% as old as the universe.

Physics & Space Science

An electron is in an infinite square well (a box) that is 2.0 nm wide

The electron makes a transition from the n = 8 to the n = 7 state, what is the wavelength of the emitted photon?(h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19) A) 880 nm B) 750 nm C) 610 nm D) 1000 nm E) 1100 nm

Physics & Space Science