I am stationary in a reference system but if my reference system is not an inertial reference system, then, relative to me, a system that is an inertial reference system must
a. remain at rest.
b. move with constant velocity.
c. be accelerating.
d. be none of the above.
c
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The main reason for connecting two or more telescopes in an interferometer is to:
A) observe more objects in a shorter amount of time. B) improve resolving power. C) enhance seeing. D) increase diffraction fringes.
Star clusters are important to our study of stars because
a. all stars formed in star clusters. b. the sun was once a member of a globular cluster. c. they give us a method to test the our theories and models of stellar evolution. d. they are the only objects that contain Cepheid variables. e. all of the above
A 4.0-?C charge is situated at the origin of an xy-coordinate system. What is the potential difference between a point x1 = 2.0 m and another point x2 = 5.0 m because of this charge?
A) - 11 × 103 V B) 11 × 103 V C) - 33 × 103 V D) 33 × 103 V E) 0 V
Four resistors are connected in parallel: the resistance values are 4-ohms, 8-ohms,12-ohms, and 16-ohms: they are connected across a 120-volt DC supply: Find the total circuit resistance.