The first Apollo missions to the Moon found the maria to be plains of solid lava

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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Uniform Circular Motion: A runner runs on a circular path of radius 10 m. What is the magnitude of the displacement of the jogger if he runs(a) half-way around the track?(b) all the way around the track?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Which element has the lowest mass per nuclear particle and therefore cannot release energy by either fusion or fission?

A) hydrogen B) oxygen C) silicon D) iron E) uranium

Physics & Space Science

The total mechanical energy of a system

A) is equally divided between kinetic energy and potential energy. B) is either all kinetic energy or all potential energy, at any one instant. C) can never be negative. D) is constant, if only conservative forces act. E) is not uniquely determined for most naturally occurring systems.

Physics & Space Science

Which is smallest?

A) a galaxy B) a local group C) a Supercluster D) the observable universe

Physics & Space Science