参考资料库
物理公式速查表
单位、压力、力、电路、波和运动的快速非认证公式。
Ohm law
参考： Voltage equals current times resistance.
V = I * RPower
参考： Electrical power from voltage and current.
P = V * IWave
参考： Wavelength from speed of light and frequency.
lambda = c / fKinematics
参考： Constant-acceleration velocity relationship.
v = u + a * t