An electron has a kinetic energy that is twice its rest energy. Determine its speed. Group of answer choices

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

Given the data calculated in parts a, b, c, and d, determine the initial rate for a reaction that starts with 0.85 m of reagent a and 0.70 m of reagents b and c?