An earthquake S wave travels through
a. the inner core only.
b. the mantle only.
c. the outer core only.
d. all of these.
b
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In what way does a 30 meter telescope outperform a 10 meter telescope?
a) The images of the 30 meter are 9 times brighter than those of a 10meter. b) The images of the 30 meter are 3 times brighter than those of a 10meter. c) All objects observed by the 30 meter telescope will appear larger than those of the10 meter. d) The 30 meter can observe light with a wavelength 3 times longer than that of the 10meter. e) The images of the 30 meter are 1/3rd as large as those of a 10 meter.
No net force acts on a loop of wire in a magnetic field when
A) no current is in the loop. B) no magnetic field lines pass through the loop. C) both of these D) neither of these
How did ancient peoples of central Africa predict the weather?
What will be an ideal response?
Exhibit 7-1
Three 5.0-kg masses are located at points in the xy plane as shown in the figure.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 7-1. What is the magnitude of the resultant force (caused by the other two masses) on the mass at x = 0.40 m, y = 0?
A. 2.2 × 10?8 N B. 1.9 × 10?8 N C. 1.4 × 10?8 N D. 1.6 × 10?8 N E. 2.5 × 10?8 N