Venus has a higher average surface temperature than Mercury. Why?

A) because it is closer to the Sun
B) because its surface is heated by an extreme greenhouse effect
C) because its surface is covered with hot lava from numerous active volcanoes
D) because its slow rotation gives it more time to heat up in sunlight


B

Physics & Space Science

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To reach the nearest known exoplanet using current technology would take:

A) a matter of months. B) 4.4 years. C) about a century. D) about 40,000 years. E) close to a million years.

Physics & Space Science

Some stars vary in brightness. What observing technique is best for observing the details of the changes in brightness?

A) Time-monitoring because we want to track how the brightness changes with time. B) Imaging because an image will show the star getting brighter and dimmer. C) Spectroscopy because changing brightness means changing temperature. D) All of the above are equally useful in detecting variation in brightness.

Physics & Space Science

The point in time when the expansion of the universe began is referred to the

A) big crunch B) cosmic detonation event C) big bang D) big blowup

Physics & Space Science

Energy and Mass: An alpha particle has a mass of 6.64 × 10-27 kg and a charge of 3.20 × 10-19 C, and it is traveling at 0.9650c. (c = 3.00 × 108 m/s), 1 eV = 1.60 × 10-19 J)(a) What is its rest energy (in GeV)?(b) What is its total energy (in GeV)?(c) What is its kinetic energy (in GeV)?

What will be an ideal response?

Physics & Space Science