In which direction does a quarter Moon rise?

A) north
B) south
C) east
D) west
E) The Moon becomes a quarter Moon only after it has risen and changed phase.


C

Physics & Space Science

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A pn-junction in an electronic circuit functions as a(n) _________.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

What happens after a helium flash?

A) The core quickly heats up and expands. B) The star breaks apart in a violent explosion. C) The core suddenly contracts. D) The core stops fusing helium. E) The star starts to fuse helium in a shell outside the core.

Physics & Space Science

Consider the circuit below. Switch S is closed at t = 0

What is the voltage across the capacitor C long after the switch is closed?

1.0 2.1 V 3.2 V 4.3 V 5.4 V 6.5 V 7.6 V 8.9 V 9.None of the above 10.Impossible to determine

Physics & Space Science

A 30-year-old astronaut goes off on a long-term mission in a spacecraft that travels at speeds close to that of light. The mission lasts exactly 20 years as measured on Earth

Biologically speaking, at the end of the mission, the astronaut's age would be A) more than 50 years. B) exactly 50 years. C) less than 50 years. D) exactly 30 years. E) exactly 25 years.

Physics & Space Science