Most stars in the Milky Way's halo are ________

A) found inside molecular clouds B) very young
C) blue or white in color D) very old


D

Physics & Space Science

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A sunspot maximum occurred in the year 2015. If the solar cycle continues, the year of the sunspot maximum that immediately follows the 2015 cycle maximum will be _____

A) 2026 B) 2020 C) 2016 D) 2030

Physics & Space Science

The NASA SETI project canceled by Congress was renamed__________and completed using private funds

A) Project Phoenix B) Gemini Program C) Project Constellation D) Landsat program

Physics & Space Science

Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. They emit sound with a frequency of 514 Hz. A person is standing away from the wall, in front of one of the loudspeakers

What is the closest distance from the wall the person can stand and hear destructive interference? The speed of sound in air is 343 m/s. A) 0.34 m B) 1.2 m C) 0.73 m D) 0.37 m E) 1.6 m

Physics & Space Science

The most powerful agent of erosion is

A) stream flow. B) glacial action. C) action from waves and ocean currents. D) wind.

Physics & Space Science