This graph shows data collected by a gamma ray telescope. What kind of event is it showing?

A) a gamma ray burst from a distant galaxy
B) a burst of gamma rays from a flare on a blue supergiant star
C) a burst of gamma rays from an explosion on the surface of a neutron star
D) the on and off gamma-ray light changes of a pulsar


A) a gamma ray burst from a distant galaxy

Physics & Space Science

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Maria are light-colored mountainous lunar highlands

Indicate whether the statement is true or false

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Compared to a chemical rocket, an ion engine has a

A) smaller thrust but can be operated for a longer time period B) smaller thrust and can only be operated for a shorter time period C) larger thrust and can be operated for a longer time period D) larger thrust but can only be operated for a shorter time period

Physics & Space Science

An amount of a monatomic ideal gas is taken around the process shown. The amount of heat extracted during process B-C is:

1.10 J 2.20 J 3.15 J 4.45 J 5.60 J 6.none of the above 7.cannot be determined

Physics & Space Science

The type of mirror that will allow you to see large areas normally hidden from your view is __________

Fill in the blank(s) with correct word

Physics & Space Science