As you move farther away from a source emitting a pure tone, the __________ of the sound you hear decreases
Fill in the blank(s) with correct word
amplitude
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A pendulum has how many natural frequencies?
A proton with mass 1.67 × 10^-27 kg moves with a speed of 0.800c in an accelerator. What is its kinetic energy? (c = 3.00 × 10^8 m/s)
a. 7.52 × 10^-11 J c. 9.02 × 10^-11 J b. 1.00 × 10^-10 J d. 3.76 × 10^-11 J
A flatbed truck is carrying a load of timber which is not tied down. The mass of the timber is 800 kg. The maximum frictional force between the truck bed and the load is 2400 N
What is the highest acceleration that the truck can have without losing its load?
A 1.50 kg hollow steel ball is submerged in water. It weighs in water 10.75 N. The volume of the cavity inside the ball is (density of steel is 
A. 0.000139 
B. 0.000213
C. 0.000348
D. 0.000401
E. 0.000476