Which makes central use of the binary system?
A) phonograph records
B) DVDs
C) both of these
D) neither of these
Answer: B
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Matter flowing into a black hole cools until it is accelerated into a jet
a. True b. False Indicate whether the statement is true or false
A 20-cm length of wire is held along an east-west direction and moved horizontally to the north with a speed of 3.0 m/s in a region where the magnetic field of the earth is 60 ?T directed 30° below the horizontal. What is the magnitude of the potential difference between the ends of the wire?
A. 36 ?V B. 18 ?V C. 31 ?V D. 24 ?V E. 21 ?V
A beam of white light of a certain frequency is incident on a metal surface. If the work function of this surface is 2.20 eV, what frequency of light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface?
A) 2.05 × 1014 Hz B) 1.02 × 1014 Hz C) 2.50 × 1014 Hz D) 3.53 × 1014 Hz E) 5.92 × 1014 Hz
The sequence of interrelated events by which rocks are formed, altered, destroyed, and re-formed is known as the ______________
Fill in the blank(s) with correct word