A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table

(a) How far from the base of the table did it strike the floor?
(b) How long was it "in flight"?


(a) 75.0 cm
(b) 0.505 s

Physics & Space Science

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Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The quantity 1/2 mv2 is

a. the kinetic energy of the crate. b. the potential energy of the crate. c. the linear momentum of the crate. d. the work you do on the crate. e. the power you supply to the crate.

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What piece of evidence suggests that the Martian moons did NOT form with Mars?

A) Their composition is significantly different from Mars and the terrestrial planets. B) They have ages that are much younger than Mars. C) They have circular orbits above the Martian equator. D) They rotate synchronously, with one side tidally fixed toward Mars. E) They are both irregularly shaped and are heavily cratered.

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Why can't current theories describe what happened during the Planck era?

A) We do not yet have a theory that links quantum mechanics and general relativity. B) We do not know how hot or dense the universe was during that time. C) We do not understand the properties of antimatter. D) The Planck era was the time before the Big Bang, and we cannot describe what happened before that instant.

Physics & Space Science

Mars probably has a large solid core surrounded by a thin shell of liquid core material in which the _______________ is unable to generate a magnetic field

Fill in the blank(s) with correct word

Physics & Space Science