A mass is attached to a fixed point by means of an ideal spring with zero unstretched length and is free to move in two dimensions
What would be the equivalent statement of Kepler's third law for this situation in the case of circular orbits around the fixed point?
The period of the orbits is independent of the radius.
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Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed for a satellite about the Moon would be
A) less than 8 km/s. B) greater than 8 km/s. C) about 8 km/s.
A galvanometer can be converted to an ammeter by the addition of a
A) small resistance in parallel. B) large resistance in parallel. C) small resistance in series. D) large resistance in series.
Three terrestrial-sized planets in orbits of a fraction of an AU have been found near
A) a white dwarf. B) a millisecond pulsar. C) Supernova 1987A. D) Cygnus X-1. E) a magnetar.
A 30.0 cm wrench is used to generate a torque at a bolt. A force of 50.0 N is applied at the end of the wrench at an angle of 70.0 degrees. The torque generated at the bolt is
A. 10.4 N•m. B. 14.1 N•m. C. 19.7 N•m. D. 21.5 N•m. E. 26.2 N•m.