A quantum particle
a. can be localized in space.
b. can be represented by an infinitely long wave having a single frequency.
c. can be represented by a wave packet.
d. travels at the phase speed of the infinitely long wave having the highest frequency.
e. has the highest probability of being present in those regions of space where its component waves interfere destructively.
c
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The Earth's magnetosphere is a
A) sphere of magnetism found just outside the molten outer core of the Earth B) spherical magnetic field generated by magnetic rocks on the Earth's surface C) cavity carved out in the solar wind by the Earth's magnetic field D) sphere of magnetism caused by the motion of charged particles in the Earth's outer atmosphere
A steady horizontal force lasting for 2.1 s gives a 1.25 kg object an acceleration of 3.2 m/s2 on a frictionless table. What impulse does this force give to the object?
A) 11 kg ? m/s B) 26 kg ? m/s C) 2.6 kg ? m/s D) 8.4 kg ? m/s
A uniform 40-N board supports two children weighing 500 N and 350 N. If the support is at the center of the board and the 500-N child is 1.5 m from its center, how far is the 350-N child from the center?
A) 1.1 m B) 1.5 m C) 2.1 m D) 2.7 m
Free Fall: A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance?
A. 20 m B. 30 m C. 50 m D. 70 m