For a standing wave in a rope or string, the points that remain stationary are called ______________
Fill in the blank(s) with correct word
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What condition or conditions is/are necessary for rotational equilibrium?
A) ?Fy = 0 B) ?Fx = 0, ?Fy = 0 C) ?? = 0 D) ?Fx = 0 E) ?Fx = 0, ?Fy = 0, ?? = 0
Nearly all the elements found in nature were formed inside stars, EXCEPT for
A) carbon and silicon. B) hydrogen and helium. C) helium and carbon. D) silver and technetium. E) uranium and radium.
In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km?
A) 79 m/s B) 310 m/s C) 260 m/s D) 160 m/s E) 510 m/s
A flat circular coil has 200 identical loops of very thin wire. Each loop has an area of 0.12 m2 and carries 0.50 A of current. This coil is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop
What is the magnitude of the magnetic torque on the coil? A) 0.25 N ? m B) 0.52 N ? m C) 2.5 N ? m D) 5.2 N ? m