UPC price scanners at supermarket checkouts use laser holography to read the bar codes because the packages are three dimensional
a. True
b. False
Indicate whether the statement is true or false
False
Physics & Space Science
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In the shell model, the second shell can hold up to _____ electrons
a. one b. two c. four d. six e. eight
Physics & Space Science
Standard time zones
a)contain 30° of latitude. b)contain 15° of longitude. c)are 12 in total number. d)are 7.5° wide.
Physics & Space Science
A fully charged capacitor (37. ?F) is discharged through a resistor (1000. ohms). If the voltage reduced to 7.6 volts after just 20. ms, what was the original potential on the capacitor?
A) 16. volts B) 9.0 volts C) 8.0 volts D) 13. volts E) 11. volts
Physics & Space Science
Spacetime is curved by
A) mass. B) the force of gravity. C) quantum fluctuations. D) the vacuum force.
Physics & Space Science