M31 in Andromeda is a bigger version of our Galaxy, and the largest member of the Local Group

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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Which of the following stars has the hottest surface temperature?

A) the blue star B) the orange star C) the green star D) the red star E) the yellow star

Physics & Space Science

What event triggered the dramatic increase in atmospheric carbon dioxide concentration seen over the last couple of centuries?

A) the invention of CFCs B) the invention of the automobile C) the Tunguska meteoric impact D) the volcanic eruption in Iceland in 1783 E) the Industrial Revolution

Physics & Space Science

Which of these, all of the same length, has the greater electrical resistance?

A) a copper rod B) an iron rod C) a rubber rod D) all about the same E) none of the above

Physics & Space Science

Sodium hydroxide, NaOH, is a strong base, which means that it readily accepts hydrogen ions. What products are formed when sodium hydroxide accepts a hydrogen ion from a water molecule?

A) water and sodium hydroxide B) sodium hydroxide and hydronium ions C) sodium ions and hydronium ions D) sodium ions and water

Physics & Space Science