What do astronomers generally believe about the origin of Mars's moons?

a. They formed with the planet out of the protoplanetary material.
b. They formed elsewhere and were captured at a later time.
c. They were ejected from Mars during its formation.
d. They were once a single moon and a later catastrophic event broke them in two.


b

Physics & Space Science

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Which property does color best represent?

a. velocity b. thermal energy c. temperature d. heat

Physics & Space Science

Calorimetry: A 35-g block of ice at -14°C is dropped into a calorimeter (of negligible heat capacity) containing 400 g of water at 0°C. When the system reaches equilibrium, how much ice is left in the calorimeter? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg.

A. 32 g B. 33 g C. 35 g D. 38 g E. 41 g

Physics & Space Science

Which of statement below about black holes is not true?

A) A spaceship passing near a 10 solar-mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10 solar-mass main-sequence star. B) We have strong observational evidence that black holes really exist. C) If you watch someone else fall into a black hole, you will never see the person cross the event horizon; you'll only see the person fade from view as the light he or she reflects (or emits) becomes more and more redshifted. D) If you fell into a black hole, you would experience time to be running normally as you plunged rapidly across the event horizon.

Physics & Space Science

All four jovian planets are oblate, with larger polar than equatorial diameters

Indicate whether the statement is true or false

Physics & Space Science