- Uncertainty budget..help me?

Discover Questions

What would our life be like if we time traveled 10 years until the past? Tan2x=2tanx/1+tan^2x... my math teacher gave me this but I thought the double-angle identity was with a denominator 1-tan^2x? In the future will trains transform into planes? What is the kinetic energy of the Earth relative to space? If two runners on a curved track move at different speed but same angular velocity is the one moving faster experiences big Time dilation?