The direction of the force on a current-carrying wire in a magnetic field is described by which of the following?
A)
parallel to the current only
B)
parallel to the magnetic field only
C)
perpendicular to the current only
D)
perpendicular to the magnetic field only
E)
perpendicular to both the current and the magnetic field
E
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Astrobiology as a field of scientific research, includes contributions from
A) only astronomers and biologists B) biologists with an interest in astronomy C) astronomers with an interest in biology D) many different scientific disciplines
The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg b. 5.0 × 10^28 kg c. 5.5 × 10^28 kg d. 4.3 × 10^28 kg e. 3.7 × 10^28 kg
Lenz's Law: A bar magnet is oriented above a copper ring, as shown in the figure. If the magnet is kept fixed while the ring is dropped, what is the direction of the current induced in the ring, as viewed from below the ring?
A. There is no current in the ring. B. counterclockwise C. clockwise
List at least three things that make Earth unique among the terrestrial planets.
Fill in the blank(s) with the appropriate word(s).