For rogue waves to form so often, they must follow a non-linear system, instead of the linear constructive interference system scientists once thought was to explain these waves. What is does it mean to be a non-linear equation?

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?