Conservation of Momentum: A 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it suddenly hits and couples with a stationary 10,000-kg boxcar. What is the speed of the cars just after the collision?

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


0.875 m/s

Physics & Space Science

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Good tracers of the spiral tracers are all I. very old. II. very young. III. very luminous. IV. moving with large radial velocities

a. I & III b. I & IV c. II & III d. II & IV e. I, III, & IV

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The fundamental frequency of a stringed instrument corresponds to a wavelength equal to one-half the length of the string

Indicate whether the statement is true or false

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You push on a wall, and the wall pushes back on you with the same force. This is an example of Newton's third law

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

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The free-stream flow outside a boundary layer is:

(A) Either laminar or turbulent, depending on the Reynolds number (B) A smooth flow free of disturbances (C) An irrotational flow (D) Neither laminar nor turbulent

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