Simple Harmonic Motion: A guitar string is set into vibration with a frequency of 512 Hz. How many oscillations does it undergo each minute?

A. 30,700
B. 8.53
C. 26.8
D. 1610
E. 512


Answer: A

Physics & Space Science

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Force F (see figure) is applied at C and is directed toward A. Its magnitude is F = 15 N. A unit vector along line CA is:

(A) -0.49i + 0.81j + 0.32k

(B) -0.5li + 0.73j + 0.39k

(C) 0.58i - 0.79j + 0.49k

(D) -0.65i + 0.22j + 0.43k

image

Physics & Space Science

The hole for a bolt in a brass plate has a diameter of 1.200 cm at 20°C. What is the diameter of the hole when the plate is heated to 220°C? The coefficient of linear thermal expansion for brass is 19 × 10-6/C°

(Express your answer to 4 significant figures.) A) 1.195 cm B) 1.125 cm C) 1.210 cm D) 1.200 cm E) 1.205 cm

Physics & Space Science

Stellar paralax proves that Earth is

a. rotating. b. revolving. c. precessing. d. an oblate spheroid.

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If the velocity of a bicycle rider decreases from 37.0 mi/h to 7.0 mi/h in 5.0 min, his average acceleration is

a) -6.0 mi/h/min b) -8.3 mi/h/min c) 1.7 mi/h/min d) -6.7 mi/h/min

Physics & Space Science