Higher-frequency sound waves are perceived as having
a. higher pitch
b. lower pitch
c. higher volume
d. lower volume
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Ответ:
Ответ:
Explanation:
Tension in the rope in upward direction = 30.2 N .
weight of bucket in downward direction = mg
net force in upward direction = 30.2 - mg
30.2 - 2.89 x 9.8
= 1.878 N
acceleration = net force / mass
= 1.878 / 2.89
= .65 m /s² .
= 65 cm /s²