5. After 58 days, a sample of a radioactive isotope contains only 6.25% of its original material. What is the half life of the isotope?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat