Apiece of wood that measures 3.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0 grams. what is the density of the wood? would it float in water?

What property of an object determines its inertia?

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?