Addition by 1. Components: The figure shows three vectors and their magnitudes and relative directions. The magnitude of the resultant of the three vectors is closest to 
A. 19.
B. 16.
C. 13.
D. 10.
E. 7.0.
Answer: C
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As shown in the figure, a container has a vertical tube, whose inner radius is 32.00 mm, connected to it at its side. An unknown liquid reaches level A in the container and level B in the tube level A being 5.0 cm higher than level B. The liquid supports a 20.0 cm high column of oil, between levels B and C, whose density is 460 kg.m-3. What is the density of the unknown liquid?
A. 1800 kg/m3
B. 1600 kg/m3
C. 1400 kg/m3
D. 2000 kg/m3
E. 1700 kg/m3
A rifle bullet shot horizontally has a vertical acceleration of ______________
Fill in the blank(s) with correct word
Which of the following is produced by the thermal vibrations of molecules?
A) shock waves B) visible C) pressure waves D) ultra-violet E) infra-red
The clouds that orbit around the earth is called ___________________.
Fill in the blank(s) with the appropriate word(s).