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anonymous

  • 4 years ago

A probe sent to the surface of Mars uncovers a pure platinum disc inscribed with the message, "We'll be right back" (in Martian, of course!). The disc is inches thick and meters in diameter. The density of platinum is 21,450 . What is the mass of the platinum disc in pounds ()?

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  1. TuringTest
    • 4 years ago
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    the volume of a cylinder (a disk is like a wide, short cylinder) is\[V=\pi r^2\ell\]where r is the radius and mass is density times volume\[m=\rho V=\rho\pi r^2\ell\]

  2. anonymous
    • 4 years ago
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    The Martian acceleration due to gravity is 3.61 while Earth's gravitational constant is 32.2 . What is the Earth weight of the disc in Newtons?

  3. TuringTest
    • 4 years ago
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    Weight is the force of gravity on an object.\[F_g=mg\]where g is the acceleration of gravity in that region.

  4. anonymous
    • 4 years ago
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    If gas costs $ per gallon at a local service station and 1 gallon= 231 cubic inches.how many cubic feet of gas can a customer buy with $ ? I got that as 2529.45 ft^3. how far can the customer drive if the car gets miles per cubic foot of gas?

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