The result was a remarkably accurate estimate of a parameter called the gravitational constant, and from that Cavendish was able to calculate the density and mass of the earth.
测量结果惊人的准确，他测出了万有引力恒量的参数，在此基础上卡文迪许计算地球的密度和质量。
2
The method of small parameter and setting up model of dumbbells are used to calculate the gravitational radiation of Double Satellite, and the expression of quadrupole radiation power is obtained.