Chernobyl has a core made of Uranium-235. It had 1659 fuel rods containing 0.069 kg per rod, so a total of 114.7 kg of U-235. The average Golden Retriever dog is around 28 kg. How many half lives until about 28 kg of U-235 is left?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.