by Zee
What did Galileo believe about the speed of falling objects? - answers-All objects fall at the
same speed unless affected by air resistance or other forces.
What is gravity according to the Newtonian picture? - answers-Gravity is the attractive force
that exists between two objects, a property of space in the presence of mass.
What was Einstein's 'Happiest Thought'? - answers-If a person falls freely, they will not feel their
own weight, implying gravity can be canceled out by acceleration.
What does Einstein's 'Equivalence Principle' state? - answers-In any location, it is impossible to
distinguish between the effects of accelerated motion and those of a gravitational field.
How does matter affect spacetime? - answers-Matter distorts spacetime like weights on a taut
rubber sheet; greater mass causes greater distortion.
What does Einstein's theory of General Relativity say about spacetime? - answers-Space-time is
curved by the presence of mass, which explains the movement of matter.
How does mass affect the curvature of spacetime? - answers-A massive object distorts the
spacetime continuum more, causing spacetime to be 'stretched' near it.
What phenomenon explains the precession of Mercury's orbit? - answers-Einstein used general
relativity to explain the discrepancy in Mercury's orbit that Newton's law could not account for.
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