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Sedbober [7]
3 years ago
13

What is in the boron family with 3 valence electrons

Physics
1 answer:
olganol [36]3 years ago
7 0
Boron, Aluminum, Gallium, Indium, Thallium
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Part complete Sound with frequency 1240 Hz leaves a room through a doorway with a width of 1.11 m . At what minimum angle relati
Sedbober [7]

Answer:

14.43° or 0.25184 rad

Explanation:

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The minimum angle relative to the center line perpendicular to the doorway will someone outside the room hear no sound is 14.43° or 0.25184 rad

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