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 3 inches thick and 0.5 meters in diameter. The density of platinum is 21,450 kg/m3. What is the mass of the platinum disc in pounds (lbm)?

lbm

The Martian acceleration due to gravity is 3.61 m/s2 while Earth's gravitational constant is 32.2 ft/s2. What is the Earth weight of the disc in Newtons?

N

Question

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 3 inches thick and 0.5 meters in diameter. The density of platinum is 21,450 kg/m3. What is the mass of the platinum disc in pounds (lbm)?

 lbm 

The Martian acceleration due to gravity is 3.61 m/s2 while Earth's gravitational constant is 32.2 ft/s2. What is the Earth weight of the disc in Newtons? 

 N