AC Generator: A circular coil with 600 turns has a radius of 15 cm. The coil is rotating about an axis perpendicular to a magnetic field of 0.020 T. If the maximum induced emf in the coil is 1.6 V, at what angular frequency is the coil rotating?
A. 0.30 rad/s
B. 0.60 rad/s
C. 0.90 rad/s
D. 1.4 rad/sec
E. 1.9 rad/s
Answer: E
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Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of 2.70 × 1030 W and has a surface temperature of 3000 K
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Which of these is NOT a consequence of dust in the interstellar medium?
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At an instant when a particle of mass 50 g has an acceleration of 80 m/s2 in the positive x direction, a 75-g particle has an acceleration of 40 m/s2 in the positive y direction. What is the magnitude of the acceleration of the center of mass of this two-particle system at this instant?
A. 60 m/s2 B. 56 m/s2 C. 40 m/s2 D. 50 m/s2 E. 46 m/s2