A _____ is an electronic device consisting of a large array of light-sensitive elements used to record very faint images
A) photometer
B) charge-coupled device
C) spectrograph
D) photographic plate
B
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All the following statements are true. Which one can be attributed to the exclusion principle?
A) If we know the location of an electron quite well, we will have little idea where it is going next. B) If an electron and antielectron meet, they will turn into energy through mutual annihilation. C) An electron has energy equal to its mass times the speed of light squared. D) Two electrons with the same spin cannot occupy the same energy level in an atom.
Which of the following best represents the energy transformations occurring in a coal-fired power plant?
A) thermal ? chemical ? electric B) gravitational ? thermal ? electric C) chemical ? electric ? thermal D) chemical ? thermal ? electric E) electric ? thermal ? chemical
A submarine can withstand an external pressure of 63 atm before collapsing. If seawater has a density of 1027 kg/m^3 how deep can the sub dive?
a. 7112 meter b. 9251 meter c. 6196 meter d. 8043 meter e. 11467 meter
The common unit of radiation absorbed dosage is the ______________
Fill in the blank(s) with correct word