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Chapter 13: Q. 4 (page 353)
What is the force of attraction between a woman and a man sitting apart?
The force of attraction between the man and woman is
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What is the ratio of the sun’s gravitational force on the moon to
the earth’s gravitational force on the moon?
What are the speed and altitude of a geosynchronous satellite orbiting Mars? Mars rotates on its axis once every
A new planet is discovered orbiting the star Vega in a circular orbit. The planet takes earth years to complete one orbit around the star. Vega’s mass is times the sun’s mass. What is the radius of the planet’s orbit? Give your answer as a multiple of the radius of the earth’s orbit.
Comets move around the sun in very elliptical orbits. At its closet approach, in 1986, Comet Halley was 8.79 x 107 km from the sun and moving with a speed of 54.6 km/s. What was the comet’s speed when it crossed Neptune’s orbit in 2006?
While visiting Planet Physics, you toss a rock straight up at 11 m/s and catch it 2.5 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet’s radius every 230 min. What are the (a) mass and (b) radius of Planet Physics?
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