Mass on a Spring: A 0.50-kg object is attached to an ideal spring of spring constant (force constant) 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. What are (a) the total energy and (b) the amplitude of vibration of the system?
What will be an ideal response?
(a) 0.56 J (b) 0.24 m
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Potential of Point-Charges: Point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. What is the potential difference VA - VB? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. +203 kV B. -203 kV C. -22.5 kV D. +22.5 kV E. 0.00 kV
Graphical Analysis: Which of the following graphs represent an object having zero acceleration?
A. only graph a B. only graph b C. graphs a and b D. graphs b and c E. graphs c and d
An ideal gas initially at 300 K and occupying a volume of 20 L is adiabatically compressed. If its final temperature is 400 K and ? = 1.30, what is its final volume?
A) 7.7 L B) 14 L C) 22 L D) 52 L
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