The lowest A on a piano has a frequency of 27.5 Hz. If the tension in the 2.00-m string is 308 N, and one-half wavelength occupies the string, what is the mass of the wire?

A. 0.025 kg
B. 0.049 kg
C. 0.051 kg
D. 0.081 kg
E. 0.037 kg


Answer: C

Physics & Space Science

You might also like to view...

A volume of air that is compressed with no heat entering or leaving becomes

A) cooler. B) remain unchanged. C) warmer. D) none of the above

Physics & Space Science

Single-Slit Diffraction: Light of wavelength 610 nm is incident on a slit 0.20 mm wide and the diffraction pattern is viewed on a screen that is 1.5 m from the slit. What is the width on the screen of the central maximum?

A. 0.34 cm B. 0.68 cm C. 0.92 cm D. 1.2 cm E. 1.5 cm

Physics & Space Science

Two flanged shafts are connected by eight 18-mm bolts. The diameter of the bolt circle is 240 mm. The allowable shear stress in the bolts is 90 MPa. Ignore friction between the flange plates. The maximum value of torque T0 is approximately:

(A) 19 kN?m
(B) 22 kN?m
(C) 29 kN?m
(D) 37 kN?m

Physics & Space Science

A rock attached to a string swings in a vertical circle. Which free-body diagram could correctly describe the force(s) on the rock when it is at the highest point, where

image is the normal force, image is weight, and image is tension?
 
a.
image

b.
image

c.
image

d.
image
 
e.
image

Physics & Space Science