If the speed of a wave on a violin string is 400 m/s, what will be the speed of the wave if the tension in the string is halved?

a. 100 m/s b. 200 m/s
c. 280 m/s d. 570 m/s


c

Physics & Space Science

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Two billiard balls having the same mass roll toward each other at the same speed. What is the net momentum of the two-ball system?

A) 0 kg?m/s B) 10 kg?m/s C) not enough information

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If the central engine for our Milky Way is a black hole of 3 million solar masses, then it has an event horizon about ________ kilometers across

Fill in the blank(s) with correct word

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A 0.40 H inductor has a current that rises from zero to 3.0 A in 6.0 s. What is the average power required to accomplish this?

A. 15 W B. 9.0 W C. 1.5 W D. 0.60 W E. 0.30 W

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The total kinetic energy of a baseball thrown with a spinning motion is a function of:

a. its linear speed but not rotational speed. c. both its linear and rotational speeds. b. its rotational speed but not linear speed. d. neither its linear nor rotational speed.

Physics & Space Science