The unexplored planet Alpha Centauri III has a radius of 7.0 ×10^6 m. A visiting astronaut drops a rock, from rest, into a 180-m-deep crevasse. She records that it takes 6.0 s for the rock to reach the bottom. What is the mass of Alpha Centauri III?
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The unexplored planet Alpha Centauri III has a radius of 7.0 ×10^6 m. A visiting astronaut drops a rock, from rest, into a 180-m-deep crevasse. She records that it takes 6.0 s for the rock to reach the bottom. What is the mass of Alpha Centauri III?
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- A cube of tin with sides of length 2.8 m is transported to the surface of Mars. What is the weight of this cube on Mars? Express this quantity in units of lbf. The specific gravity of tin is 7.28. Gravitational acceleration on Mars is 0.38 GThe mean diameters of X and Y, two planets in the same solar system, are 6.5 x 10³ km and 1.2 x 104 km, respectively. The mass of x is 0.21 times the mass of Y. The value of g on Y is 8.1 m/s². (a) What is the ratio of the mean density of X to that of Y (Px / Py)? (b) What is the value of g on X? m/s² (c) The mass of Y is 4.372 x 1024 kg. What is the escape speed on X? m/sA glass ball of radius 1.65 cm sits at the bottom of a container of milk that has a density of 1.03 g/cm3. The normal force on the ball from the container's lower surface has magnitude 8.03 × 10-2 N. What is the mass of the ball?
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