How is proper motion measured?
What will be an ideal response?
It is the apparent motion of the star, in seconds of arc, over an interval of exactly one year, after the Earth returns to the same place in its orbit, and all parallax is negated.
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LC Circuits: What capacitance is needed in series with a 3.7-mH inductor so the circuit will oscillate at a frequency of 1000 Hz?
A. 0.15 mF B. 15 ?F C. 6.8 ?F D. 0.015 ?F
The polarity of the voltage in a circuit operating at 60 Hz reverses
A) 90 times per second. B) 30 times per second. C) 10? times per second. D) 120 times per second. E) 60 times per second.
The center of mass of an object does not have to be located within the object
Indicate whether the statement is true or false
1 If the person shown here on the ground is in an inertial reference system, his friends in the van moving by at constant velocity are also in an inertial reference system. True False
Indicate whether the statement is true or false