The age of the whole Galaxy has been found from studies of its oldest stars in the ________ clusters that orbit in the Halo

Fill in the blank(s) with correct word


globular

Physics & Space Science

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A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?

a. 15 mm b. 12 mm c. 18 mm d. 24 mm e. 8.5 mm

Physics & Space Science

The outer core is thought to be molten because it

A) is denser than the inner core. B) will not transmit P-waves. C) is made of iron and nickel. D) will not transmit S-waves.

Physics & Space Science

Current statistical evidence suggests that Earth-sized planets orbiting in the habitable zone are

A) extremely rare. B) likely to exist around at least about 20% of all stars. C) found around virtually all stars.

Physics & Space Science

While many elemental spectral lines are visible, almost all molecular lines lie in the ________ portion of the spectrum, since they are at much lower energy

A) infrared B) radio C) X-ray D) ultraviolet E) visible light

Physics & Space Science