A charged particle (q = ?8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB?VA?
A. ?0.60 kV
B. +0.60 kV
C. +0.80 kV
D. ?0.80 kV
E. +0.48 kV
Answer: B
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a. it makes it easy to write big or small numbers. b. all astronomical distances are expressed in metric units. c. it makes conversions between units easy. d. all of the above
_________is when material is deposited onto an electrode in an electrochemical cell.
Fill in the blank(s) with the appropriate word(s).
A boat, whose speed in still water is 8.0 m/s, crosses a river with a current of 6.0 m/s. If the boat heads perpendicular to the current, what is the speed of the boat relative to an observer standing on the shore as it crosses the river?
A) 5.3 m/s B) 10.0 m/s C) 8.0 m/s D) 6.0 m/s
What is the binding energy of 12C? The mass of an atom of 12C is 12 u (exactly), of an atom of 1H is 1.007825 u, and of a neutron is 1.0086649 u.
A. 137 MeV B. 104 MeV C. 92.2 MeV D. 46.1 MeV E. 7.68 MeV