Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 x 1012 m. What is the orbital period of Saturn?
A) 304 y
B) 121 y
C) 109 h
D) 88.6 y
E) 29.4 y
E
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Explain the geometry of an ellipse, which Kepler used to describe a planet's orbits
What will be an ideal response?
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, this second lens having a focal length of 8.0 cm. The final image
A) is virtual and upright. B) is real and upright. C) is virtual and inverted. D) is real and inverted. E) cannot be determined with the information given.
Two-Source Interference of Sound: Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. They emit sound with a frequency of 514 Hz. A person is standing away from the wall, in front of one of the loudspeakers. What is the closest nonzero distance from the wall the person can stand and hear constructive interference? The speed of sound in air is 343 m/s.
A. 0.34 m B. 0.73 m C. 1.2 m D. 1.6 m
What does Hubble's law tell us?
A) The more distant a galaxy, the faster it is moving away from us. B) The faster a spiral galaxy's rotation speed, the more luminous it is. C) The longer the period of a Cepheid variable, the greater its luminosity. D) For every force, there is an equal and opposite reaction force.