Physics
stars which appear single to the naked eye but are double when seen through a telescope are

novas and supernovas
quasars
binaries
asteroids

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Physics
Air moves from the region where the air ________

Humidity is low to the region where the humidity is high
Pressure is low to the region where the pressure is high
Humidity is high to the region where the humidity is low
Pressure is high to the region where the pressure is low

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