题目

Many years ago, when I was fresh out of school and working in Denver, I was driving to my parents’ home in Missouri for Christmas. I stopped at a gas station(加油站) about 50 miles from Oklahoma City, where I was planning to stop and visit a friend. While I was standing in line at the cash register(收款台), I said hello to an older couple who were also paying for gas. I took off, but had gone only a few miles when black smoke poured from the back of my car. I stopped and wondered what I should do. A car pulled up behind me. It was the couple I had spoken to at the gas station. They sai太阳的能量来自下面的反应：四个质子(氢核)聚变成一个α粒子，同时发射两个正电子和两个中微子(符号ve).已知α粒子的质量为mα，质子的质量为mp，电子的质量为me，中微子的质量可忽略不计，用N表示阿伏伽德罗常数，用c表示光速，求出太阳上1 kg的氢核聚变成α粒子释放的能量.