A 2.00 m brass rod with a 1.00 mm diameter is used as a spring by stretching the rod. If the tensile modulus of brass is 
then the spring constant of the rod is
a. 
b. 
c. 
d. 
e. 
c.
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The point in the phase diagram where the vapor pressure curve ends is called the
A) critical point. B) triple point. C) melting point. D) boiling point. E) double point.
A _____ is an electronic device consisting of a large array of light-sensitive elements used to record very faint images
A) photometer B) charge-coupled device C) spectrograph D) photographic plate
A horizontal disk with a radius of 10 cm rotates about a vertical axis through its center. The disk starts from rest at t = 0 and has a constant angular acceleration of 2.1 rad/s2. At what value of t will the radial and tangential components of the linear acceleration of a point on the rim of the disk be equal in magnitude?
A. 0.55 s B. 0.63 s C. 0.69 s D. 0.59 s E. 0.47 s
If the size of the charge value is tripled for both of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor?
a. 9 b. 3 c. 1/3 d. 1/9 e. 1