Which of the following will allow you to learn something about a transiting planet's atmospheric composition?

A) Compare spectra obtained before and during an eclipse.
B) Look for slight variations in the time between transits.
C) Use the Doppler method to study the planet throughout a cycle from one transit to the next.
D) Calculate the planet's size, and then use size to infer what its atmospheric composition must be.


A) Compare spectra obtained before and during an eclipse.

Physics & Space Science

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Aluminum wire has resistivity of 0.286 x 10^-7 ohm-m where resistivity is defined as ohmarea/length. Determine the temperature distribution through an aluminum wire of ¼ inch diameter carrying 200 amperes of current if it is surrounded by air at 80ºF and with a convective heat transfer coefficient of 200 Btu/hr?ft^2?ºF.

What will be an ideal response?

Physics & Space Science

The deepest depression found on the surface of Mars is the:

A) Mariannas Trench.
B) Caloris basin.
C) Valles Marineris rift.
D) Hellas Basin of Mars.
E) Mare Crisium.

Physics & Space Science

If, with steady state heat flow established, you double the thickness of a wall built from solid uniform material, the rate of heat loss for a given temperature difference across the thickness will

A) become one-half its original value. B) also double. C) become one-fourth its original value. D) become 1/ of its original value. E) become four times its original value.

Physics & Space Science

As air rises, it

A) compresses and warms. B) compresses and cools. C) expands and warms. D) expands and cools.

Physics & Space Science