Which of the following represents a biome?
a. An extended family of chimpanzees
b. A stand of bamboo
c. An orchid and the insects that feed on it
d. A tropical rain forest
Ans: d. A tropical rain forest
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An electron of mass 9.11 × 10^?31 kg moves with a speed of 0.660c. What is its kinetic energy? (c = 3.00 × 10^8 m/s)
a. 2.71E–14 J b. 1.09E–13 J c. 8.20E–14 J d. 1.79E–14 J e. 2.04E–14 J
A segment of wire of total length 2.0 m is formed into a circular loop having 5.0 turns. If the wire carries a 1.2-A current, determine the magnitude of the magnetic field at the center of the loop
a. 79 ?T b. 69 ?T c. 59 ?T d. 89 ?T e. 9.4 ?T
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. One surface is at 25 V and the other is at 33 V. The surfaces are 1.25 cm apart. What is the direction of the electric field midway between the surfaces?
A. the field is parallel to the surfaces B. the field is perpendicular to the surfaces going from the 25 V surface to the 33 V surface C. the field is perpendicular to the surfaces going from the 33 V surface to the 25 V surface D. the field makes clockwise circles viewed from the 33 V surface E. the field makes clockwise circles viewed from the 25 V surface
Process of Science: Name a testable hypothesis from nebular theory that was proven true in observations of extrasolar planets. Does this mean the theory is complete?
What will be an ideal response?