As a result of the ejection of planetesimals into the Oort Cloud, simulations indicate that Uranus and Neptune moved
A) closer to the Sun.
B) further from the Sun.
C) along their orbits at a different rate.
D) from the inner solar system to the outer solar system.
E) from the outer solar system to the inner solar system.
B
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Rotational Dynamics: The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right). If you release the hanging blocks simultaneously from rest,
A. the block at the left lands first. B. the block at the right lands first. C. both blocks land at the same time.
When did scientists first detect gravitational waves from mergers of compact objects (pairs of neutron stars or black holes)?
A) 2015 B) 1543 C) 1990 D) Gravitational waves have not yet been detected, though scientists hope to detect them soon.
If the velocity of a bicycle rider decreases from 37.0 mi/h to 7.0 mi/h in 5.0 min, his average acceleration is
a) -6.0 mi/h/min b) -8.3 mi/h/min c) 1.7 mi/h/min d) -6.7 mi/h/min
The Ritz combination principle states that the sum of the
A) frequencies of two lines in a spectrum often equal the frequency of a third line. B) energies associated with two lines in a spectrum often equal the energy associated with a third line. C) energy transitions of quantum jumps is consistent with the conservation of energy. D) all of the above E) none of the above