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
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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
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
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
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.