Which element has an ion that is smaller than an ion of calcium?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

The energy equivalent of the rest mass of an electron is

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?