Atoy airplane on the end of a 5m long string flies in a horizontal circle at 7m/s. if the tension in the string is 2.45 n, how massive is the airplane.?

Awalk up the phase change graph worksheet

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.