Reading and memorizing ...... and understanding the concept
By velocity, you are referring to the speed of sound. It can be modelled by the equation:
V = 331m/s + (0.6m/s/C) x T (where T stands for temperature and V stands for Velocity).
Plug in the numbers and you'll get 343m/s
Transfer of heat when the two obejects are touching
New york, new york // los angeles, california // chicago illinois (just did the US)