cobalt-60, an isotope that emits gamma rays is used to treat cancer and had a half life of 5.27 years. After 15.81 years,, how much of an original sample of cobalt-60 remains?

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

What occurs when a cell engulfs large food particals