The Cenozoic era represents a period of
A) almost continuous tectonic activity.
B) relative tectonic stability.
C) worldwide tropical climates.
D) great diversification of fish species.
Answer: A
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If helium nuclei and protons are each accelerated from rest through the same potential difference V, which gets the greatest kinetic energy and by what factor is it greater?
A. the protons get twice as much kinetic energy B. the helium nuclei get twice as much kinetic energy C. they both get the same kinetic energy D. the protons get four times as much kinetic energy E. the helium nuclei get four times as much kinetic energy
Capacitors in Combination: A 9.00-µF and a 12.0-µF capacitor are connected together, and this combination is connected across a 25.0-V potential difference. How much electric energy is stored in the combination if they are connected (a) in parallel or (b) in series?
What will be an ideal response?
Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitude of the surface charge density on either of the facing surfaces is 2.0 nC/m2 . Determine the magnitude of the electric potential difference between the plates
a. 36 V b. 27 V c. 18 V d. 45 V e. 16 V
Two protons are released from rest, with only the electrostatic force exerted on them. Which of the following statements must be true about them as they move apart? (There could be more than one correct choice.)
A) Their electric potential energy keeps increasing. B) Their kinetic energy keeps increasing. C) Their electric potential energy keeps decreasing. D) Their kinetic energy keeps decreasing. E) Their acceleration keeps decreasing.