The Kepler and CoRoT missions use which technique to detect planet candidates?
A) radial velocity measurements
B) direct imaging
C) measurements of transverse motion
D) planetary transits
D
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Impedance is the total, or effective, opposition to current that takes into account both resistances and reactances
Indicate whether the statement is true or false
A wire (length = 2.0 m, diameter = 1.0 mm) has a resistance of 0.45W. What is the resistivity of the material used to make the wire?
a. 5.6 × 10^-7 W × m b. 1.2 × 10^-7 W × m c. 1.8 × 10^-7 W × m d. 2.3 × 10^-7 W × m e. 7.1 × 10^-7 W × m
The most common depositional shoreline feature is a
A) beach. B) wave-cut platform. C) barrier island. D) seamount.
This diagram represents a person's local sky. What does the red semicircle represent?
A) the horizon B) the meridian C) the zenith D) the celestial equator