A mass on a spring has a time period of 0.2 seconds. What is the frequency?

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

Which lists the organs in the correct order as food passes from the mouth to anus?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.