The planet mars has a mass of 6.42e23 kg and a radius (from its centre to the surface) of 3.38e6 m. a) determine gravity on mars. b) Determine the weight of 60.0kg person on mars

What is work? how much work is done to move an object 0 meters?

The material that keeps its new shape after it is stretched is called?

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