Suppose a "psychic" tells you that "At midnight tonight, everything will double in size." This statement is
A) a scientific prediction that is probably false because the experimental evidence will probably disprove it [based on past experience].
B) a nonscientific statement because no experiment can check it to determine whether it is true or false.
C) the greatest idea since sliced bread.
D) a nonscientific statement because it is based completely on guess-work.
E) a scientific prediction that is certainly false.
B
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Circular Motion of Charges: A charged particle is observed traveling in a circular path of radius R in a uniform magnetic field. If the particle were traveling twice as fast, the radius of the circular path would be
A. 2R. B. 4R. C. 8R. D. R/2. E. R/4.
The conditions required for a lunar eclipse are
A) (1) the phase of the Moon must be new; (2) the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. B) (1) the phase of the Moon must be full; (2) the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. C) (1) the phase of the Moon can be either new or full; (2) the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. D) (1) the phase of the Moon must be new; (2) the Moon must be located at the nearest point in its orbit around Earth. E) (1) the phase of the Moon must be full; (2) the Moon must be located at the nearest point in its orbit around Earth.
Which of the following best describes how galaxies are distributed on large scales in the universe?
A) Galaxies are uniformly distributed throughout space. B) Galaxies are randomly distributed throughout space. C) Galaxies are distributed in large, elongated chains radiating outward from a common center. D) Galaxies appear to be distributed in chains and sheets that surround great voids. E) Galaxies are distributed in a series of concentric spherical shells around a common center.
Describe the Cassini mission to Saturn in 2004-5
What will be an ideal response?