Earth's gravity can boost spacecraft velocity, and the solar system moves around the galaxy. Tides and atmosphere aren't solely governed by gravity, and mass calculation isn't based on weight multiplied by gravity.
True: Earth's gravity can act as a slingshot to boost the velocity of nearby spacecraft. The Sun, along with the entire solar system, moves around the galaxy.
False: If it is high tide in one place on Earth, the place exactly opposite to it will not necessarily have a low tide. Without gravity, there would be no atmosphere surrounding Earth. To find the mass of an object, you would not multiply the weight of the object and gravity.
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