A person of mass 50 kg has a de Broglie wavelength of 4.4 × 10-36 m while jogging
How fast is she running? (h = 6.626 × 10-34 J ? s)
A) 2.0 m/s
B) 3.0 m/s
C) 4.0 m/s
D) 5.0 m/s
B
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What will be an ideal response?
In all cases the wire shown carries a current I. For which situation is the magnitude of the magnetic field maximum at the point P?
A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is negative. The sphere is
a. rotating clockwise and slowing down. b. rotating counterclockwise and slowing down. c. rotating clockwise and speeding up. d. rotating counterclockwise and speeding up. e. first rotating counterclockwise and then clockwise.