A cylinder-piston system contains an ideal gas at a pressure of 1.0 x 10m^5 Pa. The piston is pushed in, compressing the gas from a initial volume of 0.0005 m^3 to a final volume of 0.0003m^3 . The system absorbs 25J of heat during this process. What is the change in internal energy?

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward