In Viscosity experiment, If the radius of the sphere is 0.175 cm, and the velocity of ball is 1.3 cm/sec, what is the value of viscosity coefficient? ( sphere density = 7.86 gm/cm3 , liquid density = 1.26 gm/ cm3 , g=980 cm/sec2 ).

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