Which of the fundamental interactions governs the following decay? 
A. Strong nuclear
B. Electromagnetic
C. Gravitational
D. Weak nuclear
D. Weak nuclear
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Imagine placing two long wires parallel to each other. If conventional currents flow through them in the directions shown, will the wires attract each other, repel each other, or exert no net force on each other?
A. Attract each other
B. Repel each other
C. Exert no net force on each other
Olbers's paradox is solved in part by the fact that the universe is neither infinitely large nor infinitely old
Indicate whether the statement is true or false
What is the kinetic energy of a particle of mass m that has a total energy four times its rest energy?
A. 5 mc2 B. 4 mc2 C. 3 mc2 D. 2 mc2 E. 1 mc2
Force on a Wire: A rectangular coil, with corners labeled ABCD, has length L and width w. It is placed between the poles of a magnet, as shown in the figure If there is a current I flowing through this coil in the direction shown, what is the direction of the force acting on section BC of this coil?
A. perpendicular to and into the page B. perpendicular to and out of the page C. in the direction of the magnetic field D. in the opposite direction of the magnetic field E. The force is zero.