In the figure, a small disk of radius r-3.00 cm has been glued to the edge of a larger disk of radius R-6.00 cm so that the disks lie in the same plane. The disks can be rotated around a perpendicular axis through point O at the center of the larger disk. The disks both have a uniform density (mass per unit volume) of 1.40 x 10 kg/m³ and a uniform thickness of 6.00 mm. What is the rotational inertia of the two-disk assembly about the rotation axis through O?

Please help. This problem involves finding the radius and volume of a platinum atom using its density. Thank you.

One cubic centimeter of a typical cumulus cloud contains 350 water drops, which have a typical radius of 10 μm. (a) How many cubic meters of water are in a cylindrical cumulus cloud of height 3.0 km and radius 1.0 km? (b) How many 1-liter pop bottles would that water fill? (c) Water has a density of 1000 kg/m3. How much mass does the water in the cloud have?

A box containing basketball equipment is sitting on a shipping pallet. The box plus the contents weighs 40.0 newtons [N], and the pallet weighs 155 newtons [N]. The box can be modeled as a rectangular parallelepiped and has the following dimensions: 3 inches [in] by 15 inches [in] by 20 inches [in]. Assume the pallet is also a rectangle and has the following dimensions: 4 feet [ft] by 3.5 feet [ft] by 0.25 feet [ft]. The box is sitting on the pallet in the configuration shown below. What is the pressure exerted by the box onto the pallet in units of pound-force per square inch [psi]? | Click the icon to view the conversion table. 20 in 3 in 0.25 ft [( 15 in 3.5 ft 4 ft The pressure is psi. (Round your answer to four decimal places.)