Pleas need answer asap can someone explain how snow forms

The activity of the modern sample is 1.10 bq . how long does that measurement take?

Isotopes of the same element have differ in their

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?