Sound intensity is defined as
A) the loudness of a sound.
B) the sound energy passing through a unit of area.
C) the sound power per unit time.
D) the sound power per unit volume.
E) the sound energy passing through a unit of area per unit time.
E
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A. 0.73 A B. 1.4 A C. 2.0 A D. 15 A
When does hydrogen first begin to fuse into helium in the star formation process?
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In keeping with Newton's second law of motion, if the force acting on a moving object is doubled, then its ______________ is doubled
Fill in the blank(s) with correct word
A 1.7 kg model airplane is flying north at 12.5 m/s initially - and 25 seconds later is observed heading 30 degrees west of north at 25 m/s. What is the magnitude of the average net force on the airplane during this time interval?
A. 0.85 N B. 0.63 N C. 1.1 N D. 1.5 N