To pluck a nucleon from a nucleus requires
A) work.
B) kinetic energy.
C) potential energy.
D) none of the above
Answer: A
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A parallel-plate capacitor, with air between the plates, is connected across a voltage source. This source establishes a potential difference between the plates by placing charge of magnitude 4.15 × 10-6 C on each plate
The space between the plates is then filled with a dielectric material, with a dielectric constant of 7.74. What must the magnitude of the charge on each capacitor plate now be, to produce the same potential difference between the plates as before?
Wave Characteristics: For a certain electromagnetic wave in free space, at one instant the electric field vector points in the +z direction while the magnetic field vector points in the +x direction, as shown in the figure. In what direction is this wave traveling?
A. +x B. -x C. +y D. -y E. +z
An object of mass 20.0 kg is lifted vertically through 1.00 m by a 400 N force. How much work is done by the net force in lifting this object? Use g = 10.0 m/s2
A) 20.0 J B) 40.0 J C) 100 J D) 200 J E) 400 J
Which type of force would be the equal and opposite force to a gravitational force?
a. gravitational b. electromagnetic c. strong d. weak e. It could be any one of the above or some combination of them.