Two protons are a distance 4. 10-9 m apart. What is the electric potential energy of the system consisting of the two protons? (J) 2. A proton and an electron are a distance 4. 10-9 m apart. What is the electric potential energy of the system consisting of the proton and the electron?(J) Which of the following statements are true? If any two charged particles are released from rest, they will spontaneously move in the direction in which the potential energy of the system will be decreased. In some situations charged particles released from rest would move in a direction that increases electric potential energy, but not in other situations. If released from rest two protons would move closer together, increasing the potential energy of the system. (can be more than one!) please help me due tonight!

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.