The Goodyear airship contains 5 400 m³ of helium having a density of 0.179 kg/m³. The solid parts of the airship have a weight of 5.10x10⁴ N. How much extra weight can the airship carry in equilibrium if the density of air is 1.29 kg/m³?

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

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.