Of the eight known planets in our solar system, the innermost is Mercury. When compared to the other planets in the system, Mercury has the:
a. greatest centripetal acceleration.
b. greatest period of revolution.
c. smallest angular velocity.
d. smallest tangential velocity.
a
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The Tully-Fisher relation exists between the galaxy's luminosity and its
A) age. B) mass. C) size. D) rotation. E) color.
A conducting bar rests on two parallel horizontal rails 50 cm apart forming a square area. The resistance of the bar and the rails is assumed to be constant and equal to 0.05 ?
A uniform magnetic field 0.5 T is perpendicular to the plane of the rails. The value of the field is uniformly reduced to zero in a time of 0.1 s. What is the maximum value of the force acting on the bar during that time? A) 6.25 N B) 4.12 N C) 2.05 N D) 5.75 N E) 1.00 N
Which of the following is an essential agent of the Bergeron process?
a. Wind b. Carbon dioxide c. Mixing d. Rain
A cylindrical capacitor is made of two concentric cylinders. The inner cylinder has radius r1 = 4 mm, and the outer one a radius r2 = 8 mm. The common length of the cylinders is L = 150 m
What is the potential energy stored in this capacitor when a potential difference V = 4 V is applied between the inner and outer cylinder? A) 9.6 × 10-8 J B) 1.3 × 10-8 J C) 6.3 × 10-8 J D) 0.34 × 10-8 J E) 4.6 × 10-8 J