Overall, what is our most accurate technique for measuring the distance to a nearby star?
A) stellar parallax
B) radar ranging
C) Hubble's law
D) Cepheid variables
A) stellar parallax
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Faraday's Law: A flat square coil of wire with 15 turns and an area of 0.40 m2 is placed with the plane of its area parallel to a magnetic field of 0.75 T. The coil is flipped so its plane is perpendicular to the magnetic field in a time of 0.050 s. What is the magnitude of the average induced emf in the coil?
A. 6.0 V B. 36 V C. 45 V D. 90 V
A star with a declination of +60.0 degrees will be
A) north of the celestial equator. B) east of the vernal equinox. C) west of the vernal equinox. D) south of the celestial equator. E) None of these answers is correct.
Three 3.0-W resistors are connected in parallel to a 12.0-V battery. What is the current in any one of the resistors?
a. 0.75 A c. 4.0 A b. 12 A d. 1.3 A
Most of the world's water is in
A) icecaps. B) glaciers. C) rivers and lakes. D) the oceans.