A pi is a subatomic particle called a Pion that is positively charged. It has a mean lifetime of about 26 ns (26x10-9 s) as measured in the lion's frame of reference. Suppose a pion is created in the atmosphere and is moving at 0.507c relative to a stationary observer on Earth. How long does the pion "live" in ns according to the Earth bound observer

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

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?