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7 Jan 2020
Which of the following cannot travel in a vacuum?
-
a light wave
-
a sound wave
-
a radio wave
-
all can
-
none can
Which of the following cannot travel in a vacuum?
-
a light wave
-
a sound wave
-
a radio wave
-
all can
-
none can
christopherc63Lv10
8 Nov 2022
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27 Apr 2022
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Tod ThielLv2
7 Jan 2020
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