A 2.00 kg pendulum bob on a string 1.50 m long, is released with a velocity of 4.00 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the velocity of the bob at the bottom of the swing?
A. 4.47 m/s
B. 4.02 m/s
C. 3.75 m/s
D. 3.50 m/s
E. 2.85 m/s
A. 4.47 m/s
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a. Cretaceous b. Devonian c. Jurassic d. Tertiary e. Cambrian
The current shown flowing through each coil must be 
A. increasing. B. decreasing. C. remaining constant. D. One needs more information to say how it is varying.
As a normal object’s thermal energy U goes to zero, the slope of a graph of its entropy S versus U
A. approaches infinity. B. approaches some positive value less than infinity. C. approaches zero. D. approaches some finite negative value. E. approaches negative infinity. F. depends entirely on the object’s properties.
What is the maximum length of steel cable that can hang vertically supported from one end of the cable?
The Young's modulus of this steel is 2.10 × 1011 N/m2, the tensile strength of this steel is 7.4 × 108 N/m2, and the density of this steel is 7.6 × 103 kg/m2. A) 9.93 km B) 4.22 km C) 456 m D) 1.75 km E) 24.8 km