, 08.11.2019 01:31 lesgumball

# What is the difference between the velocity and the speed of an object? question 1 options: velocity is the change in distance over time, while speed is the change in velocity over time. velocity has a direction associated with it, while speed has no specific direction. velocity has no direction associated with it, while speed has a specific direction. velocity is the change in speed over time, while speed is the change in distance over time.

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Aprocess depressurizes nitrogen adiabatically from an unknown pressure to 1 bar. the temperature of nitrogen is initially 300 k and after depressurizing it is 200 k. assuming nitrogen is an ideal gas, and that gas heat capacity of nitrogen is given by: cigp=31.1−0.0135t+2.68×10^−5t^2−1.17×10^−8t^3jmol^−1k^−1 a) calculate the initial pressure of nitrogen. b) calculate the entropy change of nitrogen due to this process.