In addition to asteroids, ________ impacts also provided the primitive Earth with water and organics

Fill in the blank(s) with correct word

comet

Physics & Space Science

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The wavelength of an electromagnetic wave is 600 nm. What is its frequency?

A) 200 × 1012 Hz B) 300 × 1012 Hz C) 400 × 1012 Hz D) 500 × 1012 Hz E) 600 × 1012 Hz

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How did Thomson measure the charge to mass ratio of the electron?

A. He shot helium nuclei into gold foil to measure the nuclei scattering against electrons within. B. He passed cathode rays through a magnetic field and measured the deflection. C. He suspended a drop of oil between electrodes to measure the electric field from the electrons. D. He measured very precisely a known quantity of hydrogen atoms and calculated the reduced mass ratio within each atom.

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In atomic absorption chromatography, the amount of light absorbed is ________ to the concentration of the element in the test sample.

A) is not related B) indirectly related C) directly related

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Physics & Space Science

How did dark matter behave differently from normal matter during the early stages of the big bang, and how is this important for the formation of stars and galaxies?

What will be an ideal response?

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Physics & Space Science