Also, I need the answer in like 5 mins. This is kinda hard for me can someone help me. It's about the solar system.

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Drag each item into the proper state of matter category.

Positrons are spontaneously emitted from the nuclei of