Though Titan has a small mass , it is able to retain an atmosphere because it

a. is very cold.
b. is very hot
c. has an iron surface.
d. attracts gas from the solar wind.


a

Physics & Space Science

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Which of the following is true of Mercury?

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An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state. Determine the wavelength of the emitted photon (in nm)

a. 1006 b. 209 c. 306 d. 103 e. 821

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Chemical energy is transformed into gravitational energy when

A) a leaf undergoes photosynthesis. B) a person walks uphill. C) water evaporates. D) a car accelerates. E) a block slides downhill.

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Addition by Components: A car travels 20 km west and then 20 km south. Use components to find the magnitude of its displacement vector?

A. 0 km B. 20 km C. 28 km D. 40 km

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