Find speed of sound at temperature of 40 Celsius?

Why is alchemy not considered to be a science ?

What is the speed of an object at a given moment?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system