A freely-falling watermelon falls with constant

A) velocity.
B) speed.
C) acceleration.
D) distances each successive second.


Answer: C

Physics & Space Science

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A 10 kg bomb is moving NORTH with a velocity of 4.0 m/s. It explodes into three fragments: a 5.0 kg fragment moving WEST with a speed of 8.0 m/s, a 4.0 kg fragment moving EAST with a speed of 10 m/s, and a third 1.0 kg fragment. What is the velocity of the third fragment?

A. zero B. 40 m/s NORTH C. 40 m/s SOUTH D. none of these answers are correct

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Many astronomers now regard Pluto as just one of the largest of the thousands of Kuiper Belt bodies found beyond Neptune

Indicate whether the statement is true or false

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An x-ray tube accelerates electrons through a potential difference of 50.0 kV. If an electron in the beam suddenly give up its kinetic energy in a collision,

what is the shortest wavelength x-ray it could produce? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, e = 1.60 × 10-19 C)

Physics & Space Science